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ladybird/Userland/Libraries/LibJS/AST.cpp

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LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
/*
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
* Copyright (c) 2020-2023, Andreas Kling <kling@serenityos.org>
LibJS: Unify Symbol::description() and raw_description() Let callers take care of handling the empty optional case (undefined in the spec).
2023-02-11 16:02:14 +00:00
* Copyright (c) 2020-2023, Linus Groh <linusg@serenityos.org>
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
* Copyright (c) 2021-2022, David Tuin <davidot@serenityos.org>
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
2021-04-22 01:24:48 -07:00
* SPDX-License-Identifier: BSD-2-Clause
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
*/
LibJS: Replace ASTNode::class_name() with RTTI This is only used for debugging anyway, so performance doesn't matter too much.
2021-01-17 09:21:15 +01:00
#include <AK/Demangle.h>
LibJS: Allow functions to take arguments (#1405)
2020-03-12 19:22:13 +08:00
#include <AK/HashMap.h>
LibJS: Do not revisit already visited values in update_function_name() Fixes #3471, adds a test.
2020-09-18 18:00:57 +04:30
#include <AK/HashTable.h>
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
#include <AK/QuickSort.h>
LibJS: Clean up the anonymous wrapper block in "for" using ScopeGuard This ensures that we don't forget to pop the wrapper off of the scope stack when returning early due to an exception or some such. :^)
2020-04-05 00:24:32 +02:00
#include <AK/ScopeGuard.h>
LibJS: Allow functions to take arguments (#1405)
2020-03-12 19:22:13 +08:00
#include <AK/StringBuilder.h>
LibJS: Add basic support for "with" statements with statements evaluate an expression and put the result of it at the "front" of the scope chain. This is implemented by creating a WithScope object and placing it in front of the VM's current call frame's scope.
2020-11-28 16:14:26 +01:00
#include <AK/TemporaryChange.h>
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
#include <LibCrypto/BigInt/SignedBigInteger.h>
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
#include <LibJS/AST.h>
LibJS: Replace uses of MarkedValueList with MarkedVector<Value> This is effectively a drop-in replacement.
2022-02-09 10:06:40 +00:00
#include <LibJS/Heap/MarkedVector.h>
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
#include <LibJS/Interpreter.h>
LibJS: Implement the NewObjectEnvironment() abstract operation
2021-06-22 01:14:27 +02:00
#include <LibJS/Runtime/AbstractOperations.h>
LibJS: Add object literal getter/setter shorthand Adds support for the following syntax: let foo = { get x() { // ... }, set x(value) { // ... } }
2020-05-21 17:28:28 -07:00
#include <LibJS/Runtime/Accessor.h>
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
#include <LibJS/Runtime/Array.h>
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
#include <LibJS/Runtime/BigInt.h>
LibJS: Rename OrdinaryFunctionObject to ECMAScriptFunctionObject The old name is the result of the perhaps somewhat confusingly named abstract operation OrdinaryFunctionCreate(), which creates an "ordinary object" (https://tc39.es/ecma262/#ordinary-object) in contrast to an "exotic object" (https://tc39.es/ecma262/#exotic-object). However, the term "Ordinary Function" is not used anywhere in the spec, instead the created object is referred to as an "ECMAScript Function Object" (https://tc39.es/ecma262/#sec-ecmascript-function-objects), so let's call it that. The "ordinary" vs. "exotic" distinction is important because there are also "Built-in Function Objects", which can be either implemented as ordinary ECMAScript function objects, or as exotic objects (our NativeFunction). More work needs to be done to move a lot of infrastructure to ECMAScriptFunctionObject in order to make FunctionObject nothing more than an interface for objects that implement [[Call]] and optionally [[Construct]].
2021-09-24 22:40:38 +02:00
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
#include <LibJS/Runtime/Error.h>
LibJS: Drop "Record" suffix from all the *Environment record classes "Records" in the spec are basically C++ classes, so let's drop this mouthful of a suffix.
2021-07-01 12:24:46 +02:00
#include <LibJS/Runtime/FunctionEnvironment.h>
LibJS: Add "constructor" property to constructor prototypes
2020-04-08 11:05:38 +02:00
#include <LibJS/Runtime/GlobalObject.h>
LibJS: Integrate iterator protocol into language features Finally use Symbol.iterator protocol in language features :) currently only used in for-of loops and spread expressions, but will have more uses later (Maps, Sets, Array.from, etc).
2020-07-13 08:27:20 -07:00
#include <LibJS/Runtime/IteratorOperations.h>
LibJS: Implement constructor/non-constructor function calls This adds Function::construct() for constructor function calls via `new` keyword. NativeFunction doesn't have constructor behaviour by default, ScriptFunction simply calls call() in construct()
2020-04-01 18:31:24 +01:00
#include <LibJS/Runtime/NativeFunction.h>
LibJS: Drop "Record" suffix from all the *Environment record classes "Records" in the spec are basically C++ classes, so let's drop this mouthful of a suffix.
2021-07-01 12:24:46 +02:00
#include <LibJS/Runtime/ObjectEnvironment.h>
LibJS: Add "Heap" and "Runtime" subdirectories Let's try to keep LibJS tidy as it expands. :^)
2020-03-16 14:20:30 +01:00
#include <LibJS/Runtime/PrimitiveString.h>
LibJS: Move PromiseCapability into its own cpp/h file This is not strictly connected to PromiseReaction in any way. Preparation before doing some actual work on it :^)
2022-10-02 10:59:22 +01:00
#include <LibJS/Runtime/PromiseCapability.h>
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
#include <LibJS/Runtime/PromiseConstructor.h>
LibJS: Add Reference class to represent a base.property reference Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
2020-04-27 12:10:16 +02:00
#include <LibJS/Runtime/Reference.h>
LibJS: Lex and parse regex literals, add RegExp objects This adds regex parsing/lexing, as well as a relatively empty RegExpObject. The purpose of this patch is to allow the engine to not get hung up on parsing regexes. This will aid in finding new syntax errors (say, from google or twitter) without having to replace all of their regexes first!
2020-06-03 16:05:49 -07:00
#include <LibJS/Runtime/RegExpObject.h>
LibJS: Add spreading in object literals Supports spreading strings, arrays, and other objects within object literals.
2020-04-27 21:52:47 -07:00
#include <LibJS/Runtime/Shape.h>
LibJS: Include <typeinfo> in AST.cpp again Linus points out that oss-fuzz wants this to be there.
2021-02-10 12:21:14 +01:00
#include <typeinfo>
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
namespace JS {
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
class InterpreterNodeScope {
AK_MAKE_NONCOPYABLE(InterpreterNodeScope);
AK_MAKE_NONMOVABLE(InterpreterNodeScope);
public:
LibJS: Switch AST.{h,cpp} to east const
2021-06-11 02:13:06 +04:30
InterpreterNodeScope(Interpreter& interpreter, ASTNode const& node)
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
: m_interpreter(interpreter)
LibJS: Don't track executing AST nodes in a Vector Instead just link together the InterpreterNodeScopes in a linked list. This was surprisingly hot on CanvasCycle.
2021-03-21 17:38:42 +01:00
, m_chain_node { nullptr, node }
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
{
LibJS: Rename CallFrame => ExecutionContext This struct represents what the ECMAScript specification calls an "execution context" so let's use the same terminology. :^)
2021-06-24 19:17:45 +02:00
m_interpreter.vm().running_execution_context().current_node = &node;
Userland: Silence or resolve new GCC 13 warnings GCC 13 produces the following true positive warnings: - `-Wredundant-move` when trying to move `result->tooltip()`, which is a const reference in `Assistant/main.cpp` - `-Wuse-after-free` when freeing an environment variable before removing it from `s_malloced_environment_variables` - `-Wdangling-pointer` when storing an AST node's `this` pointer to the interpreter's node stack in LibJS. This is not actually an issue, as it is popped when the scope ends, but GCC has no way of telling this.
2023-05-11 11:04:30 +02:00
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdangling-pointer"
// The node pointer is popped from the interpreter in the destructor.
LibJS: Don't track executing AST nodes in a Vector Instead just link together the InterpreterNodeScopes in a linked list. This was surprisingly hot on CanvasCycle.
2021-03-21 17:38:42 +01:00
m_interpreter.push_ast_node(m_chain_node);
Userland: Silence or resolve new GCC 13 warnings GCC 13 produces the following true positive warnings: - `-Wredundant-move` when trying to move `result->tooltip()`, which is a const reference in `Assistant/main.cpp` - `-Wuse-after-free` when freeing an environment variable before removing it from `s_malloced_environment_variables` - `-Wdangling-pointer` when storing an AST node's `this` pointer to the interpreter's node stack in LibJS. This is not actually an issue, as it is popped when the scope ends, but GCC has no way of telling this.
2023-05-11 11:04:30 +02:00
#pragma GCC diagnostic push
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
}
~InterpreterNodeScope()
{
LibJS: Don't track executing AST nodes in a Vector Instead just link together the InterpreterNodeScopes in a linked list. This was surprisingly hot on CanvasCycle.
2021-03-21 17:38:42 +01:00
m_interpreter.pop_ast_node();
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
}
private:
Interpreter& m_interpreter;
LibJS: Don't track executing AST nodes in a Vector Instead just link together the InterpreterNodeScopes in a linked list. This was surprisingly hot on CanvasCycle.
2021-03-21 17:38:42 +01:00
ExecutingASTNodeChain m_chain_node;
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
};
LibJS: Reduce AST memory usage by shrink-wrapping source range info Before this change, each AST node had a 64-byte SourceRange member. This SourceRange had the following layout: filename: StringView (16 bytes) start: Position (24 bytes) end: Position (24 bytes) The Position structs have { line, column, offset }, all members size_t. To reduce memory consumption, AST nodes now only store the following: source_code: NonnullRefPtr<SourceCode> (8 bytes) start_offset: u32 (4 bytes) end_offset: u32 (4 bytes) SourceCode is a new ref-counted data structure that keeps the filename and original parsed source code in a single location, and all AST nodes have a pointer to it. The start_offset and end_offset can be turned into (line, column) when necessary by calling SourceCode::range_from_offsets(). This will walk the source code string and compute line/column numbers on the fly, so it's not necessarily fast, but it should be rare since this information is primarily used for diagnostics and exception stack traces. With this, ASTNode shrinks from 80 bytes to 32 bytes. This gives us a ~23% reduction in memory usage when loading twitter.com/awesomekling (330 MiB before, 253 MiB after!) :^)
2022-11-21 17:37:38 +01:00
ASTNode::ASTNode(SourceRange source_range)
LibJS: Rearrange ASTNode members so there's a padding hole at the end ASTNode inherits from RefCounted, which has a single 32-bit member. This means that there's a 32-bit padding hole after RefCounted, where we are free to put something (or it will go to waste!) This patch moves ASTNode::m_start_offset into that padding hole, and we now have a 32-bit padding hole at the end of ASTNode instead. This will allow ASTNode subclasses to put things in the ASTNode hole by moving them to the head of the member list.
2022-11-26 19:01:55 +01:00
: m_start_offset(source_range.start.offset)
, m_source_code(source_range.code)
LibJS: Reduce AST memory usage by shrink-wrapping source range info Before this change, each AST node had a 64-byte SourceRange member. This SourceRange had the following layout: filename: StringView (16 bytes) start: Position (24 bytes) end: Position (24 bytes) The Position structs have { line, column, offset }, all members size_t. To reduce memory consumption, AST nodes now only store the following: source_code: NonnullRefPtr<SourceCode> (8 bytes) start_offset: u32 (4 bytes) end_offset: u32 (4 bytes) SourceCode is a new ref-counted data structure that keeps the filename and original parsed source code in a single location, and all AST nodes have a pointer to it. The start_offset and end_offset can be turned into (line, column) when necessary by calling SourceCode::range_from_offsets(). This will walk the source code string and compute line/column numbers on the fly, so it's not necessarily fast, but it should be rare since this information is primarily used for diagnostics and exception stack traces. With this, ASTNode shrinks from 80 bytes to 32 bytes. This gives us a ~23% reduction in memory usage when loading twitter.com/awesomekling (330 MiB before, 253 MiB after!) :^)
2022-11-21 17:37:38 +01:00
, m_end_offset(source_range.end.offset)
{
}
SourceRange ASTNode::source_range() const
{
return m_source_code->range_from_offsets(m_start_offset, m_end_offset);
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
DeprecatedString ASTNode::class_name() const
LibJS: Replace ASTNode::class_name() with RTTI This is only used for debugging anyway, so performance doesn't matter too much.
2021-01-17 09:21:15 +01:00
{
// NOTE: We strip the "JS::" prefix.
Everywhere: Explicitly specify the size in StringView constructors This commit moves the length calculations out to be directly on the StringView users. This is an important step towards the goal of removing StringView(char const*), as it moves the responsibility of calculating the size of the string to the user of the StringView (which will prevent naive uses causing OOB access).
2022-07-11 19:53:29 +00:00
auto const* typename_ptr = typeid(*this).name();
return demangle({ typename_ptr, strlen(typename_ptr) }).substring(4);
LibJS: Replace ASTNode::class_name() with RTTI This is only used for debugging anyway, so performance doesn't matter too much.
2021-01-17 09:21:15 +01:00
}
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
static void print_indent(int indent)
{
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
out("{}", DeprecatedString::repeated(' ', indent * 2));
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static void update_function_name(Value value, DeprecatedFlyString const& name)
LibJS: Do not revisit already visited values in update_function_name() Fixes #3471, adds a test.
2020-09-18 18:00:57 +04:30
{
LibJS: Only update anonymous function names when necessary Previously we would generate function names for anonymous functions on every AssignmentExpression, even if we weren't assigning a function. We were also setting names of anonymous functions in arrays, which is apparently a SpiderMonkey specific behavior not supported by V8, JSC or required by ECMA262. This patch removes that behavior. This is a huge performance improvement on the CanvasCycle demo! :^)
2021-03-21 17:14:20 +01:00
if (!value.is_function())
return;
auto& function = value.as_function();
LibJS: Rename OrdinaryFunctionObject to ECMAScriptFunctionObject The old name is the result of the perhaps somewhat confusingly named abstract operation OrdinaryFunctionCreate(), which creates an "ordinary object" (https://tc39.es/ecma262/#ordinary-object) in contrast to an "exotic object" (https://tc39.es/ecma262/#exotic-object). However, the term "Ordinary Function" is not used anywhere in the spec, instead the created object is referred to as an "ECMAScript Function Object" (https://tc39.es/ecma262/#sec-ecmascript-function-objects), so let's call it that. The "ordinary" vs. "exotic" distinction is important because there are also "Built-in Function Objects", which can be either implemented as ordinary ECMAScript function objects, or as exotic objects (our NativeFunction). More work needs to be done to move a lot of infrastructure to ECMAScriptFunctionObject in order to make FunctionObject nothing more than an interface for objects that implement [[Call]] and optionally [[Construct]].
2021-09-24 22:40:38 +02:00
if (is<ECMAScriptFunctionObject>(function) && function.name().is_empty())
static_cast<ECMAScriptFunctionObject&>(function).set_name(name);
LibJS: Do not revisit already visited values in update_function_name() Fixes #3471, adds a test.
2020-09-18 18:00:57 +04:30
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
static ThrowCompletionOr<DeprecatedString> get_function_property_name(PropertyKey key)
LibJS: Integrate Symbols into objects as valid keys This allows objects properties to be created for symbol keys in addition to just plain strings/numbers
2020-07-07 21:38:46 -07:00
{
LibJS: Ensure we only call toString on computed properties once
2022-02-17 15:09:39 -08:00
if (key.is_symbol())
LibJS: Port Symbol to String This includes the VM's global_symbol_registry HashMap, which can now store String keys.
2023-02-11 16:14:41 +00:00
return DeprecatedString::formatted("[{}]", key.as_symbol()->description().value_or(String {}));
LibJS: Ensure we only call toString on computed properties once
2022-02-17 15:09:39 -08:00
return key.to_string();
LibJS: Integrate Symbols into objects as valid keys This allows objects properties to be created for symbol keys in addition to just plain strings/numbers
2020-07-07 21:38:46 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.2.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-block-runtime-semantics-evaluation
// StatementList : StatementList StatementListItem
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ScopeNode::evaluate_statements(Interpreter& interpreter) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
auto completion = normal_completion({});
for (auto const& node : children()) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
completion = node->execute(interpreter).update_empty(completion.value());
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (completion.is_abrupt())
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
break;
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return completion;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
// 14.13.4 Runtime Semantics: LabelledEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-labelledevaluation
// BreakableStatement : IterationStatement
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static Completion labelled_evaluation(Interpreter& interpreter, IterationStatement const& statement, Vector<DeprecatedFlyString> const& label_set)
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
{
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Let stmtResult be Completion(LoopEvaluation of IterationStatement with argument labelSet).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = statement.loop_evaluation(interpreter, label_set);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
// 2. If stmtResult.[[Type]] is break, then
if (result.type() == Completion::Type::Break) {
// a. If stmtResult.[[Target]] is empty, then
if (!result.target().has_value()) {
// i. If stmtResult.[[Value]] is empty, set stmtResult to NormalCompletion(undefined).
// ii. Else, set stmtResult to NormalCompletion(stmtResult.[[Value]]).
result = normal_completion(result.value().value_or(js_undefined()));
}
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Return ? stmtResult.
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
return result;
}
// 14.13.4 Runtime Semantics: LabelledEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-labelledevaluation
// BreakableStatement : SwitchStatement
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static Completion labelled_evaluation(Interpreter& interpreter, SwitchStatement const& statement, Vector<DeprecatedFlyString> const&)
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
{
// 1. Let stmtResult be the result of evaluating SwitchStatement.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = statement.execute_impl(interpreter);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
// 2. If stmtResult.[[Type]] is break, then
if (result.type() == Completion::Type::Break) {
// a. If stmtResult.[[Target]] is empty, then
if (!result.target().has_value()) {
// i. If stmtResult.[[Value]] is empty, set stmtResult to NormalCompletion(undefined).
// ii. Else, set stmtResult to NormalCompletion(stmtResult.[[Value]]).
result = normal_completion(result.value().value_or(js_undefined()));
}
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Return ? stmtResult.
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
return result;
}
// 14.13.4 Runtime Semantics: LabelledEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-labelledevaluation
// LabelledStatement : LabelIdentifier : LabelledItem
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static Completion labelled_evaluation(Interpreter& interpreter, LabelledStatement const& statement, Vector<DeprecatedFlyString> const& label_set)
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
{
auto const& labelled_item = *statement.labelled_item();
// 1. Let label be the StringValue of LabelIdentifier.
auto const& label = statement.label();
// 2. Let newLabelSet be the list-concatenation of labelSet and « label ».
// Optimization: Avoid vector copy if possible.
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Optional<Vector<DeprecatedFlyString>> new_label_set;
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
if (is<IterationStatement>(labelled_item) || is<SwitchStatement>(labelled_item) || is<LabelledStatement>(labelled_item)) {
new_label_set = label_set;
new_label_set->append(label);
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let stmtResult be Completion(LabelledEvaluation of LabelledItem with argument newLabelSet).
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
Completion result;
if (is<IterationStatement>(labelled_item))
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
result = labelled_evaluation(interpreter, static_cast<IterationStatement const&>(labelled_item), *new_label_set);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
else if (is<SwitchStatement>(labelled_item))
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
result = labelled_evaluation(interpreter, static_cast<SwitchStatement const&>(labelled_item), *new_label_set);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
else if (is<LabelledStatement>(labelled_item))
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
result = labelled_evaluation(interpreter, static_cast<LabelledStatement const&>(labelled_item), *new_label_set);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
else
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
result = labelled_item.execute(interpreter);
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
// 4. If stmtResult.[[Type]] is break and SameValue(stmtResult.[[Target]], label) is true, then
if (result.type() == Completion::Type::Break && result.target() == label) {
// a. Set stmtResult to NormalCompletion(stmtResult.[[Value]]).
result = normal_completion(result.value());
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return ? stmtResult.
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
return result;
}
// 14.13.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-labelled-statements-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion LabelledStatement::execute(Interpreter& interpreter) const
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Use more consistent wording for creating empty lists This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/0bf22a9
2022-05-03 21:20:21 +02:00
// 1. Return ? LabelledEvaluation of this LabelledStatement with argument « ».
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Implement LabelledStatement & LabelledEvaluation semantics Instead of slapping 0..N labels on a statement like the current LabelableStatement does, we need the spec's LabelledStatement for a proper implementation of control flow using only completions - it always has one label and one labelled statement - what appears to be 'multiple labels' on the same statement is actually nested LabelledStatements. Note that this is unused yet and will fully replace LabelableStatement in the next commit.
2022-01-05 18:54:25 +01:00
}
void LabelledStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("(Label)");
print_indent(indent + 2);
outln("\"{}\"", m_label);
print_indent(indent + 1);
outln("(Labelled item)");
m_labelled_item->dump(indent + 2);
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 10.2.1.3 Runtime Semantics: EvaluateBody, https://tc39.es/ecma262/#sec-runtime-semantics-evaluatebody
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion FunctionBody::execute(Interpreter& interpreter) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Fix two typos in comments in AST.cpp
2022-01-02 21:44:19 +01:00
// Note: Scoping should have already been set up by whoever is calling this FunctionBody.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 1. Return ? EvaluateFunctionBody of FunctionBody with arguments functionObject and argumentsList.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return evaluate_statements(interpreter);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
// 14.2.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-block-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion BlockStatement::execute(Interpreter& interpreter) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
LibJS: Skip declarative env in block statement without lexical decls The idea here is simple: If the block statement doesn't contain any lexical declarations, we don't need to allocate, initialize and eventually garbage collect a new declarative environment. This even makes lookups across nested blocks slightly faster as we don't have to traverse a chain of empty environments anymore - instead, the execution context just stores the outermost non-empty one. This doesn't speed up test-js considerably, but has a noticeable effect on test262 and real-world web content :^)
2021-10-05 12:59:04 +01:00
Environment* old_environment { nullptr };
// Optimization: We only need a new lexical environment if there are any lexical declarations. :^)
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
if (!has_lexical_declarations())
return evaluate_statements(interpreter);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
old_environment = vm.running_execution_context().lexical_environment;
auto block_environment = new_declarative_environment(*old_environment);
LibJS: Make BlockDeclarationInstantiation take a VM& There's no need for this to require an AST Interpreter.
2023-06-16 16:12:11 +02:00
block_declaration_instantiation(vm, block_environment);
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
vm.running_execution_context().lexical_environment = block_environment;
// 5. Let blockValue be the result of evaluating StatementList.
auto block_value = evaluate_statements(interpreter);
// 6. Set blockValue to DisposeResources(blockEnv, blockValue).
block_value = dispose_resources(vm, block_environment, block_value);
vm.running_execution_context().lexical_environment = old_environment;
return block_value;
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion Program::execute(Interpreter& interpreter) const
LibJS: Strict mode is now handled by Functions and Programs, not Blocks Since blocks can't be strict by themselves, it makes no sense for them to store whether or not they are strict. Strict-ness is now stored in the Program and FunctionNode ASTNodes. Fixes issue #3641
2020-10-03 17:02:43 -07:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return evaluate_statements(interpreter);
LibJS: Strict mode is now handled by Functions and Programs, not Blocks Since blocks can't be strict by themselves, it makes no sense for them to store whether or not they are strict. Strict-ness is now stored in the Program and FunctionNode ASTNodes. Fixes issue #3641
2020-10-03 17:02:43 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 15.2.6 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-function-definitions-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion FunctionDeclaration::execute(Interpreter& interpreter) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto& vm = interpreter.vm();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (m_is_hoisted) {
// Perform special annexB steps see step 3 of: https://tc39.es/ecma262/#sec-web-compat-functiondeclarationinstantiation
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// i. Let genv be the running execution context's VariableEnvironment.
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto variable_environment = interpreter.vm().running_execution_context().variable_environment;
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// ii. Let benv be the running execution context's LexicalEnvironment.
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto lexical_environment = interpreter.vm().running_execution_context().lexical_environment;
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// iii. Let fobj be ! benv.GetBindingValue(F, false).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto function_object = MUST(lexical_environment->get_binding_value(vm, name(), false));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// iv. Perform ? genv.SetMutableBinding(F, fobj, false).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
TRY(variable_environment->set_mutable_binding(vm, name(), function_object, false));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// v. Return unused.
return Optional<Value> {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return unused.
return Optional<Value> {};
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 15.2.6 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-function-definitions-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion FunctionExpression::execute(Interpreter& interpreter) const
LibJS: Add FunctionExpression AST node Most of the code is shared with FunctionDeclaration, so the shared bits are moved up into a common base called FunctionNode.
2020-03-19 11:12:08 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return InstantiateOrdinaryFunctionExpression of FunctionExpression.
LibJS/Bytecode: Add codegen for "named evaluation if anonymous function" This gives anonymous functions the name from the LHS they are being assigned to. 171 new passes on test262. :^)
2023-06-23 14:27:42 +02:00
return instantiate_ordinary_function_expression(interpreter.vm(), name());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
// 15.2.5 Runtime Semantics: InstantiateOrdinaryFunctionExpression, https://tc39.es/ecma262/#sec-runtime-semantics-instantiateordinaryfunctionexpression
LibJS/Bytecode: Add codegen for "named evaluation if anonymous function" This gives anonymous functions the name from the LHS they are being assigned to. 171 new passes on test262. :^)
2023-06-23 14:27:42 +02:00
Value FunctionExpression::instantiate_ordinary_function_expression(VM& vm, DeprecatedFlyString given_name) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (given_name.is_empty())
given_name = "";
auto has_own_name = !name().is_empty();
LibJS: Make FunctionExpression more spec-compliant
2021-07-07 22:53:32 +02:00
LibJS: Use Identifier to represent name of FunctionNode
2023-07-02 00:35:51 +03:00
auto const used_name = has_own_name ? name() : given_name.view();
LibJS/Bytecode: Add codegen for "named evaluation if anonymous function" This gives anonymous functions the name from the LHS they are being assigned to. 171 new passes on test262. :^)
2023-06-23 14:27:42 +02:00
auto environment = NonnullGCPtr { *vm.running_execution_context().lexical_environment };
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (has_own_name) {
LibJS: Rename scope to environment This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/3246553
2022-05-01 01:10:05 +02:00
VERIFY(environment);
environment = new_declarative_environment(*environment);
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(environment->create_immutable_binding(vm, name(), false));
LibJS: Make FunctionExpression more spec-compliant
2021-07-07 22:53:32 +02:00
}
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto private_environment = vm.running_execution_context().private_environment;
LibJS: Add PrivateEnvironment
2021-10-11 20:29:31 +02:00
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
auto closure = ECMAScriptFunctionObject::create(realm, used_name, source_text(), body(), parameters(), function_length(), environment, private_environment, kind(), is_strict_mode(), might_need_arguments_object(), contains_direct_call_to_eval(), is_arrow_function());
LibJS: Make FunctionExpression more spec-compliant
2021-07-07 22:53:32 +02:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// FIXME: 6. Perform SetFunctionName(closure, name).
// FIXME: 7. Perform MakeConstructor(closure).
if (has_own_name)
LibJS: Add an initialize binding hint to all initialize_binding methods This will allow us to specify things like SyncDispose and perhaps AsyncDispose in the future.
2022-12-14 13:26:10 +01:00
MUST(environment->initialize_binding(vm, name(), closure, Environment::InitializeBindingHint::Normal));
LibJS: Make FunctionExpression more spec-compliant
2021-07-07 22:53:32 +02:00
return closure;
LibJS: Add FunctionExpression AST node Most of the code is shared with FunctionDeclaration, so the shared bits are moved up into a common base called FunctionNode.
2020-03-19 11:12:08 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.4.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-empty-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion EmptyStatement::execute(Interpreter&) const
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
{
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return empty.
return Optional<Value> {};
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.5.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-expression-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ExpressionStatement::execute(Interpreter& interpreter) const
LibJS: Add Javascript lexer and parser This adds a basic Javascript lexer and parser. It can parse the currently existing demo programs. More work needs to be done to turn it into a complete parser than can parse arbitrary JS Code. The lexer outputs tokens with preceeding whitespace and comments in the trivia member. This should allow us to generate the exact source code by concatenating the generated tokens. The parser is written in a way that it always returns a complete syntax tree. Error conditions are represented as nodes in the tree. This simplifies the code and allows it to be used as an early stage parser, e.g for parsing JS documents in an IDE while editing the source code.:
2020-03-11 19:27:43 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let exprRef be the result of evaluating Expression.
// 2. Return ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_expression->execute(interpreter);
LibJS: Add Javascript lexer and parser This adds a basic Javascript lexer and parser. It can parse the currently existing demo programs. More work needs to be done to turn it into a complete parser than can parse arbitrary JS Code. The lexer outputs tokens with preceeding whitespace and comments in the trivia member. This should allow us to generate the exact source code by concatenating the generated tokens. The parser is written in a way that it always returns a complete syntax tree. Error conditions are represented as nodes in the tree. This simplifies the code and allows it to be used as an early stage parser, e.g for parsing JS documents in an IDE while editing the source code.:
2020-03-11 19:27:43 +01:00
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
// TODO: This shouldn't exist. Refactor into EvaluateCall.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<CallExpression::ThisAndCallee> CallExpression::compute_this_and_callee(Interpreter& interpreter, Reference const& callee_reference) const
LibJS: Reorganize computing of |this| for CallExpressions This avoids executing the LHS of the object expression twice when doing a call on the result of an object expression.
2020-04-01 18:51:27 +02:00
{
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto& vm = interpreter.vm();
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
if (callee_reference.is_property_reference()) {
auto this_value = callee_reference.get_this_value();
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto callee = TRY(callee_reference.get_value(vm));
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return ThisAndCallee { this_value, callee };
LibJS: Reorganize computing of |this| for CallExpressions This avoids executing the LHS of the object expression twice when doing a call on the result of an object expression.
2020-04-01 18:51:27 +02:00
}
LibJS: Fix functions binding this to global object in strict mode This fixes an issue where this would be bound to the global object by default when operating in strict mode. According to the specification, the expected value for |this| when no binding is provided is undefined.
2021-06-04 11:52:20 +01:00
LibJS: Resolve the correct this value for calls in with statements
2022-08-17 22:51:42 +02:00
Value this_value = js_undefined();
if (callee_reference.is_environment_reference()) {
if (Object* base_object = callee_reference.base_environment().with_base_object(); base_object != nullptr)
this_value = base_object;
}
LibJS: Follow the spec more closely when determining the this value Co-authored-by: davidot <david.tuin@gmail.com>
2021-07-12 01:37:51 +02:00
// [[Call]] will handle that in non-strict mode the this value becomes the global object
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return ThisAndCallee {
LibJS: Resolve the correct this value for calls in with statements
2022-08-17 22:51:42 +02:00
this_value,
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
callee_reference.is_unresolvable()
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
? TRY(m_callee->execute(interpreter)).release_value()
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
: TRY(callee_reference.get_value(vm))
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
};
LibJS: Reorganize computing of |this| for CallExpressions This avoids executing the LHS of the object expression twice when doing a call on the result of an object expression.
2020-04-01 18:51:27 +02:00
}
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
// 13.3.8.1 Runtime Semantics: ArgumentListEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-argumentlistevaluation
Everywhere: Use ReadonlySpan<T> instead of Span<T const>
2023-02-05 19:02:54 +00:00
static ThrowCompletionOr<void> argument_list_evaluation(Interpreter& interpreter, ReadonlySpan<CallExpression::Argument> const arguments, MarkedVector<Value>& list)
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
{
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto& vm = interpreter.vm();
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
list.ensure_capacity(arguments.size());
for (auto& argument : arguments) {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(argument.value->execute(interpreter)).release_value();
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
if (argument.is_spread) {
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
TRY(get_iterator_values(vm, value, [&](Value iterator_value) -> Optional<Completion> {
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
list.append(iterator_value);
LibJS: Convert get_iterator_values helper to ThrowCompletionOr This one is a bit unusual, so to clarify: Previously, callers of get_iterator_values() would supply a callback that would return an IterationDecision, and an enum to indicate whether iterator_close() should be invoked upon IterationDecision::Break. Now, use of both those enums is removed, and callers must return an Optional<Completion>. If a Completion is provided, the iterator will be closed, and that completion will be returned from get_iterator_values. Otherwise, once the iterator is exhausted, a default-initialized Completion will be returned.
2021-10-20 12:10:23 -04:00
return {};
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
}));
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
} else {
list.append(value);
}
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return {};
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
}
LibJS: Evaluate NewExpression arguments before checking constructor type Exactly like in 99f9609, which fixed the same issue in CallExpression, the spec tells us to *first* evaluate the arguments, if any, and *then* check if the provided value is a constructor function.
2021-12-30 01:01:28 +01:00
// 13.3.5.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-new-operator-runtime-semantics-evaluation
// 13.3.5.1.1 EvaluateNew ( constructExpr, arguments ), https://tc39.es/ecma262/#sec-evaluatenew
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion NewExpression::execute(Interpreter& interpreter) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Tidy up CallExpression::execute() a little bit
2020-10-13 19:00:37 +02:00
auto& vm = interpreter.vm();
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
LibJS: Evaluate NewExpression arguments before checking constructor type Exactly like in 99f9609, which fixed the same issue in CallExpression, the spec tells us to *first* evaluate the arguments, if any, and *then* check if the provided value is a constructor function.
2021-12-30 01:01:28 +01:00
// 1. Let ref be the result of evaluating constructExpr.
// 2. Let constructor be ? GetValue(ref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto constructor = TRY(m_callee->execute(interpreter)).release_value();
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
LibJS: Evaluate NewExpression arguments before checking constructor type Exactly like in 99f9609, which fixed the same issue in CallExpression, the spec tells us to *first* evaluate the arguments, if any, and *then* check if the provided value is a constructor function.
2021-12-30 01:01:28 +01:00
// 3. If arguments is empty, let argList be a new empty List.
// 4. Else,
// a. Let argList be ? ArgumentListEvaluation of arguments.
LibJS: Replace uses of MarkedValueList with MarkedVector<Value> This is effectively a drop-in replacement.
2022-02-09 10:06:40 +00:00
MarkedVector<Value> arg_list(vm.heap());
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
TRY(argument_list_evaluation(interpreter, arguments(), arg_list));
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
LibJS: Evaluate NewExpression arguments before checking constructor type Exactly like in 99f9609, which fixed the same issue in CallExpression, the spec tells us to *first* evaluate the arguments, if any, and *then* check if the provided value is a constructor function.
2021-12-30 01:01:28 +01:00
// 5. If IsConstructor(constructor) is false, throw a TypeError exception.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!constructor.is_constructor())
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return throw_type_error_for_callee(interpreter, constructor, "constructor"sv);
LibJS: Evaluate NewExpression arguments before checking constructor type Exactly like in 99f9609, which fixed the same issue in CallExpression, the spec tells us to *first* evaluate the arguments, if any, and *then* check if the provided value is a constructor function.
2021-12-30 01:01:28 +01:00
// 6. Return ? Construct(constructor, argList).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
return Value { TRY(construct(vm, constructor.as_function(), move(arg_list))) };
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
Optional<DeprecatedString> CallExpression::expression_string() const
LibJS: Forward a string aproximation of the CallExpression to Call Ops This gives us better debug output when analysing calls to `undefined` and also fixes multiple test-js cases expecting an `(evaluated from $Expression)` in the error message. This also refactors out the generation of that string, to avoid code duplication with the AST interpreter.
2022-10-01 01:36:06 +02:00
{
if (is<Identifier>(*m_callee))
return static_cast<Identifier const&>(*m_callee).string();
if (is<MemberExpression>(*m_callee))
return static_cast<MemberExpression const&>(*m_callee).to_string_approximation();
return {};
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion CallExpression::throw_type_error_for_callee(Interpreter& interpreter, Value callee_value, StringView call_type) const
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
{
auto& vm = interpreter.vm();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
LibJS: Forward a string aproximation of the CallExpression to Call Ops This gives us better debug output when analysing calls to `undefined` and also fixes multiple test-js cases expecting an `(evaluated from $Expression)` in the error message. This also refactors out the generation of that string, to avoid code duplication with the AST interpreter.
2022-10-01 01:36:06 +02:00
if (auto expression_string = this->expression_string(); expression_string.has_value())
LbJS: Convert exception-related usages of Value::TDSWOSE to String TDSWOSE being to_deprecated_string_without_side_effects.
2023-02-12 21:26:14 -05:00
return vm.throw_completion<TypeError>(ErrorType::IsNotAEvaluatedFrom, TRY_OR_THROW_OOM(vm, callee_value.to_string_without_side_effects()), call_type, expression_string.release_value());
LibJS: Forward a string aproximation of the CallExpression to Call Ops This gives us better debug output when analysing calls to `undefined` and also fixes multiple test-js cases expecting an `(evaluated from $Expression)` in the error message. This also refactors out the generation of that string, to avoid code duplication with the AST interpreter.
2022-10-01 01:36:06 +02:00
LbJS: Convert exception-related usages of Value::TDSWOSE to String TDSWOSE being to_deprecated_string_without_side_effects.
2023-02-12 21:26:14 -05:00
return vm.throw_completion<TypeError>(ErrorType::IsNotA, TRY_OR_THROW_OOM(vm, callee_value.to_string_without_side_effects()), call_type);
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
}
LibJS: Implement constructor/non-constructor function calls This adds Function::construct() for constructor function calls via `new` keyword. NativeFunction doesn't have constructor behaviour by default, ScriptFunction simply calls call() in construct()
2020-04-01 18:31:24 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.6.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-function-calls-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion CallExpression::execute(Interpreter& interpreter) const
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto callee_reference = TRY(m_callee->to_reference(interpreter));
auto [this_value, callee] = TRY(compute_this_and_callee(interpreter, callee_reference));
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
VERIFY(!callee.is_empty());
LibJS: Replace uses of MarkedValueList with MarkedVector<Value> This is effectively a drop-in replacement.
2022-02-09 10:06:40 +00:00
MarkedVector<Value> arg_list(vm.heap());
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
TRY(argument_list_evaluation(interpreter, arguments(), arg_list));
LibJS: Allow functions to take arguments (#1405)
2020-03-12 19:22:13 +08:00
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!callee.is_function())
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return throw_type_error_for_callee(interpreter, callee, "function"sv);
LibJS: Evaluate function arguments before checking callee type In the spec, this happens in the EvaluateCall abstract operation (https://tc39.es/ecma262/#sec-evaluatecall), and the order is defined as: 3. Let argList be ? ArgumentListEvaluation of arguments. 4. If Type(func) is not Object, throw a TypeError exception. 5. If IsCallable(func) is false, throw a TypeError exception. In LibJS this is handled by CallExpression::execute(), which had the callee function check first and would therefore never evaluate the arguments for a non-function callee.
2021-09-13 17:44:08 +01:00
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
auto& function = callee.as_function();
LibJS: Move intrinsics to the realm Intrinsics, i.e. mostly constructor and prototype objects, but also things like empty and new object shape now live on a new heap-allocated JS::Intrinsics object, thus completing the long journey of taking all the magic away from the global object. This represents the Realm's [[Intrinsics]] slot in the spec and matches its existing [[GlobalObject]] / [[GlobalEnv]] slots in terms of architecture. In the majority of cases it should now be possibly to fully allocate a regular object without the global object existing, and in fact that's what we do now - the realm is allocated before the global object, and the intrinsics between both :^)
2022-08-27 00:54:55 +01:00
if (&function == realm.intrinsics().eval_function()
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
&& callee_reference.is_environment_reference()
&& callee_reference.name().is_string()
&& callee_reference.name().as_string() == vm.names.eval.as_string()) {
LibJS: Break out ArgumentListEvaluation AO from CallExpression
2021-07-02 14:24:50 +02:00
auto script_value = arg_list.size() == 0 ? js_undefined() : arg_list[0];
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
return perform_eval(vm, script_value, vm.in_strict_mode() ? CallerMode::Strict : CallerMode::NonStrict, EvalMode::Direct);
LibJS: Correct behaviour of direct vs. indirect eval eval only has direct access to the local scope when accessed through the name eval. This includes locals named eval, because of course it does.
2021-06-19 20:13:53 -07:00
}
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
return call(vm, function, this_value, move(arg_list));
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
}
// 13.3.7.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-super-keyword-runtime-semantics-evaluation
// SuperCall : super Arguments
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SuperCall::execute(Interpreter& interpreter) const
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
// 1. Let newTarget be GetNewTarget().
auto new_target = vm.get_new_target();
// 2. Assert: Type(newTarget) is Object.
VERIFY(new_target.is_function());
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let func be GetSuperConstructor().
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
auto* func = get_super_constructor(interpreter.vm());
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 4. Let argList be ? ArgumentListEvaluation of Arguments.
LibJS: Replace uses of MarkedValueList with MarkedVector<Value> This is effectively a drop-in replacement.
2022-02-09 10:06:40 +00:00
MarkedVector<Value> arg_list(vm.heap());
LibJS: Use a synthetic constructor if class with parent doesn't have one We already did this but it called the @@iterator method of %Array.prototype% visible to the user for example by overriding that method. This should not be visible so we use a special version of SuperCall now.
2022-08-20 17:27:02 +02:00
if (m_is_synthetic == IsPartOfSyntheticConstructor::Yes) {
// NOTE: This is the case where we have a fake constructor(...args) { super(...args); } which
// shouldn't call @@iterator of %Array.prototype%.
VERIFY(m_arguments.size() == 1);
VERIFY(m_arguments[0].is_spread);
auto const& argument = m_arguments[0];
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = MUST(argument.value->execute(interpreter)).release_value();
LibJS: Use a synthetic constructor if class with parent doesn't have one We already did this but it called the @@iterator method of %Array.prototype% visible to the user for example by overriding that method. This should not be visible so we use a special version of SuperCall now.
2022-08-20 17:27:02 +02:00
VERIFY(value.is_object() && is<Array>(value.as_object()));
auto& array_value = static_cast<Array const&>(value.as_object());
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto length = MUST(length_of_array_like(vm, array_value));
LibJS: Use a synthetic constructor if class with parent doesn't have one We already did this but it called the @@iterator method of %Array.prototype% visible to the user for example by overriding that method. This should not be visible so we use a special version of SuperCall now.
2022-08-20 17:27:02 +02:00
for (size_t i = 0; i < length; ++i)
arg_list.append(array_value.get_without_side_effects(PropertyKey { i }));
} else {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
TRY(argument_list_evaluation(interpreter, m_arguments, arg_list));
LibJS: Use a synthetic constructor if class with parent doesn't have one We already did this but it called the @@iterator method of %Array.prototype% visible to the user for example by overriding that method. This should not be visible so we use a special version of SuperCall now.
2022-08-20 17:27:02 +02:00
}
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 5. If IsConstructor(func) is false, throw a TypeError exception.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!func || !Value(func).is_constructor())
LibJS: Remove GlobalObject from VM::throw_completion() This is a continuation of the previous five commits. A first big step into the direction of no longer having to pass a realm (or currently, a global object) trough layers upon layers of AOs! Unlike the create() APIs we can safely assume that this is only ever called when a running execution context and therefore current realm exists. If not, you can always manually allocate the Error and put it in a Completion :^) In the spec, throw exceptions implicitly use the current realm's intrinsics as well: https://tc39.es/ecma262/#sec-throw-an-exception
2022-08-16 20:33:17 +01:00
return vm.throw_completion<TypeError>(ErrorType::NotAConstructor, "Super constructor");
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 6. Let result be ? Construct(func, argList, newTarget).
LibJS: Convert standalone construct() to NonnullGCPtr
2022-12-14 19:35:49 +00:00
auto result = TRY(construct(vm, static_cast<FunctionObject&>(*func), move(arg_list), &new_target.as_function()));
LibJS: Split out NewExpression evaluation from CallExpression This patch adds an override for NewExpression::execute() in the AST interpreter to separate the logic from CallExpression. As a result, both evaluation functions are simplified. Both expressions are still largely non-conforming, but this makes it easier to work on improving that since we can now deal with them separately. :^)
2021-07-02 18:25:32 +02:00
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 7. Let thisER be GetThisEnvironment().
LibJS: Convert get_this_environment() to NonnullGCPtr
2022-12-15 20:07:13 +00:00
auto& this_er = verify_cast<FunctionEnvironment>(*get_this_environment(vm));
LibJS: Add basic prototype support Object will now traverse up the prototype chain when doing a get(). When a function is called on an object, that object will now also be the "this" value inside the function. This stuff is probably not very correct, but we will improve things as we go! :^)
2020-03-15 15:01:10 +01:00
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 8. Perform ? thisER.BindThisValue(result).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
TRY(this_er.bind_this_value(vm, result));
LibJS: Support array holes, encoded as empty JS::Value This patch adds a new kind of JS::Value, the empty value. It's what you get when you do JSValue() (or most commonly, {} in C++.) An empty Value signifies the absence of a value, and should never be visible to JavaScript itself. As of right now, it's used for array holes and as a return value when an exception has been thrown and we just want to unwind. This patch is a bit of a mess as I had to fix a whole bunch of code that was relying on JSValue() being undefined, etc.
2020-04-06 20:24:45 +02:00
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 9. Let F be thisER.[[FunctionObject]].
LibJS: Move additional notes to spec comments onto their own line Having all spec comments verbatim on their own line with no additions made by us will make it easier to automate comparing said comments to their current spec counterparts.
2022-04-11 21:32:37 +01:00
// 10. Assert: F is an ECMAScript function object.
// NOTE: This is implied by the strong C++ type.
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
[[maybe_unused]] auto& f = this_er.function_object();
// 11. Perform ? InitializeInstanceElements(result, F).
LibJS: Move initialize_instance_elements() from VM to Object This makes more sense as an Object method rather than living within the VM class for no good reason. Most of the other 7.3.xx AOs already work the same way. Also add spec comments while we're here.
2022-12-07 00:22:23 +00:00
TRY(result->initialize_instance_elements(f));
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// 12. Return result.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return Value { result };
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 15.5.5 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-generator-function-definitions-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion YieldExpression::execute(Interpreter&) const
LibJS: Implement generator functions (only in bytecode mode)
2021-06-11 01:38:30 +04:30
{
// This should be transformed to a return.
VERIFY_NOT_REACHED();
}
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
// 15.8.5 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-async-function-definitions-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion AwaitExpression::execute(Interpreter& interpreter) const
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
auto& vm = interpreter.vm();
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
// 1. Let exprRef be the result of evaluating UnaryExpression.
// 2. Let value be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(m_argument->execute(interpreter)).release_value();
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
// 3. Return ? Await(value).
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
return await(vm, value);
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.10.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-return-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ReturnStatement::execute(Interpreter& interpreter) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// ReturnStatement : return ;
if (!m_argument) {
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 1. Return Completion Record { [[Type]]: return, [[Value]]: undefined, [[Target]]: empty }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Return, js_undefined(), {} };
}
// ReturnStatement : return Expression ;
// 1. Let exprRef be the result of evaluating Expression.
// 2. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(m_argument->execute(interpreter));
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// NOTE: Generators are not supported in the AST interpreter
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. If GetGeneratorKind() is async, set exprValue to ? Await(exprValue).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 4. Return Completion Record { [[Type]]: return, [[Value]]: exprValue, [[Target]]: empty }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Return, value, {} };
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
// 14.6.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-if-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion IfStatement::execute(Interpreter& interpreter) const
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
// IfStatement : if ( Expression ) Statement else Statement
// 1. Let exprRef be the result of evaluating Expression.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Let exprValue be ToBoolean(? GetValue(exprRef)).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto predicate_result = TRY(m_predicate->execute(interpreter)).release_value();
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
// 3. If exprValue is true, then
if (predicate_result.to_boolean()) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let stmtCompletion be the result of evaluating the first Statement.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return ? UpdateEmpty(stmtCompletion, undefined).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_consequent->execute(interpreter).update_empty(js_undefined());
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
}
LibJS: Parse "if" statements This patch implements basic parsing of "if" statements. We don't yet support parsing "else", so I added a FIXME about that.
2020-03-21 18:40:17 +01:00
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
// 4. Else,
if (m_alternate) {
// a. Let stmtCompletion be the result of evaluating the second Statement.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return ? UpdateEmpty(stmtCompletion, undefined).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_alternate->execute(interpreter).update_empty(js_undefined());
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
}
LibJS: Parse "if" statements This patch implements basic parsing of "if" statements. We don't yet support parsing "else", so I added a FIXME about that.
2020-03-21 18:40:17 +01:00
LibJS: Add missing undefined fallback to IfStatement completions Also add spec comments.
2021-12-31 15:38:38 +01:00
// IfStatement : if ( Expression ) Statement
// 3. If exprValue is false, then
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Return undefined.
return js_undefined();
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
}
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 14.11.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-with-statement-runtime-semantics-evaluation
// WithStatement : with ( Expression ) Statement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion WithStatement::execute(Interpreter& interpreter) const
LibJS: Parse "with" statements :^)
2020-11-28 15:05:57 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 1. Let value be the result of evaluating Expression.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(m_object->execute(interpreter)).release_value();
LibJS: Add basic support for "with" statements with statements evaluate an expression and put the result of it at the "front" of the scope chain. This is implemented by creating a WithScope object and placing it in front of the VM's current call frame's scope.
2020-11-28 16:14:26 +01:00
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 2. Let obj be ? ToObject(? GetValue(value)).
LibJS: Port Value::to_object() to NonnullGCPtr
2023-04-13 15:26:41 +02:00
auto object = TRY(value.to_object(vm));
LibJS: Add basic support for "with" statements with statements evaluate an expression and put the result of it at the "front" of the scope chain. This is implemented by creating a WithScope object and placing it in front of the VM's current call frame's scope.
2020-11-28 16:14:26 +01:00
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 3. Let oldEnv be the running execution context's LexicalEnvironment.
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto old_environment = vm.running_execution_context().lexical_environment;
LibJS: Add basic support for "with" statements with statements evaluate an expression and put the result of it at the "front" of the scope chain. This is implemented by creating a WithScope object and placing it in front of the VM's current call frame's scope.
2020-11-28 16:14:26 +01:00
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 4. Let newEnv be NewObjectEnvironment(obj, true, oldEnv).
LibJS: Port Value::to_object() to NonnullGCPtr
2023-04-13 15:26:41 +02:00
auto new_environment = new_object_environment(object, true, old_environment);
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 5. Set the running execution context's LexicalEnvironment to newEnv.
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
vm.running_execution_context().lexical_environment = new_environment;
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 6. Let C be the result of evaluating Statement.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = m_body->execute(interpreter);
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
// 7. Set the running execution context's LexicalEnvironment to oldEnv.
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Make the `with` statement evaluation follow the spec even more This was almost entirely up-to-spec already, just missing exception checks, and we now leave the lexical environment in the modified state if an exception occurs during statement evaluation.
2021-07-04 17:22:27 +02:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 8. Return ? UpdateEmpty(C, undefined).
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return result.update_empty(js_undefined());
LibJS: Parse "with" statements :^)
2020-11-28 15:05:57 +01:00
}
LibJS: Implement the LoopContinues AO
2022-01-05 19:00:36 +01:00
// 14.7.1.1 LoopContinues ( completion, labelSet ), https://tc39.es/ecma262/#sec-loopcontinues
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static bool loop_continues(Completion const& completion, Vector<DeprecatedFlyString> const& label_set)
LibJS: Implement the LoopContinues AO
2022-01-05 19:00:36 +01:00
{
// 1. If completion.[[Type]] is normal, return true.
if (completion.type() == Completion::Type::Normal)
return true;
// 2. If completion.[[Type]] is not continue, return false.
if (completion.type() != Completion::Type::Continue)
return false;
// 3. If completion.[[Target]] is empty, return true.
if (!completion.target().has_value())
return true;
// 4. If completion.[[Target]] is an element of labelSet, return true.
if (label_set.contains_slow(*completion.target()))
return true;
// 5. Return false.
return false;
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion WhileStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.3.2 Runtime Semantics: WhileLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-whileloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion WhileStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Implement While statements
2020-03-09 03:22:21 +08:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let V be undefined.
LibJS: Implement non-value-producing statements properly For various statements the spec states: Return NormalCompletion(empty). In those cases we have been returning undefined so far, which is incorrect. In other cases it states: Return Completion(UpdateEmpty(stmtCompletion, undefined)). Which essentially means a statement is evaluated and its completion value returned if non-empty, and undefined otherwise. While not actually noticeable in normal scripts as the VM's "last value" can't be accessed from JS code directly (with the exception of eval(), see below), it provided an inconsistent experience in the REPL: > if (true) 42; 42 > if (true) { 42; } undefined This also fixes the case where eval() would return undefined if the last executed statement is not a value-producing one: eval("1;;;;;") eval("1;{}") eval("1;var a;") As a consequence of the changes outlined above, these now all correctly return 1. See https://tc39.es/ecma262/#sec-block-runtime-semantics-evaluation, "NOTE 2". Fixes #3609.
2021-03-16 09:12:34 +01:00
auto last_value = js_undefined();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Repeat,
LibJS: Check for exception after executing (do)while test expression Otherwise we crash the interpreter when an exception is thrown during evaluation of the while or do/while test expression - which is easily caused by a ReferenceError - e.g.: while (someUndefinedVariable) { // ... }
2020-10-23 00:40:14 +01:00
for (;;) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let exprRef be the result of evaluating Expression.
// b. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto test_result = TRY(m_test->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// c. If ToBoolean(exprValue) is false, return V.
LibJS: Check for exception after executing (do)while test expression Otherwise we crash the interpreter when an exception is thrown during evaluation of the while or do/while test expression - which is easily caused by a ReferenceError - e.g.: while (someUndefinedVariable) { // ... }
2020-10-23 00:40:14 +01:00
if (!test_result.to_boolean())
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
return last_value;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// d. Let stmtResult be the result of evaluating Statement.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto body_result = m_body->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// e. If LoopContinues(stmtResult, labelSet) is false, return ? UpdateEmpty(stmtResult, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (!loop_continues(body_result, label_set))
return body_result.update_empty(last_value);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// f. If stmtResult.[[Value]] is not empty, set V to stmtResult.[[Value]].
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (body_result.value().has_value())
last_value = *body_result.value();
LibJS: Implement While statements
2020-03-09 03:22:21 +08:00
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
VERIFY_NOT_REACHED();
LibJS: Implement While statements
2020-03-09 03:22:21 +08:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion DoWhileStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.2.2 Runtime Semantics: DoWhileLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-dowhileloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion DoWhileStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Add support for do..while statements
2020-04-04 21:29:23 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let V be undefined.
LibJS: Implement non-value-producing statements properly For various statements the spec states: Return NormalCompletion(empty). In those cases we have been returning undefined so far, which is incorrect. In other cases it states: Return Completion(UpdateEmpty(stmtCompletion, undefined)). Which essentially means a statement is evaluated and its completion value returned if non-empty, and undefined otherwise. While not actually noticeable in normal scripts as the VM's "last value" can't be accessed from JS code directly (with the exception of eval(), see below), it provided an inconsistent experience in the REPL: > if (true) 42; 42 > if (true) { 42; } undefined This also fixes the case where eval() would return undefined if the last executed statement is not a value-producing one: eval("1;;;;;") eval("1;{}") eval("1;var a;") As a consequence of the changes outlined above, these now all correctly return 1. See https://tc39.es/ecma262/#sec-block-runtime-semantics-evaluation, "NOTE 2". Fixes #3609.
2021-03-16 09:12:34 +01:00
auto last_value = js_undefined();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Repeat,
LibJS: Check for exception after executing (do)while test expression Otherwise we crash the interpreter when an exception is thrown during evaluation of the while or do/while test expression - which is easily caused by a ReferenceError - e.g.: while (someUndefinedVariable) { // ... }
2020-10-23 00:40:14 +01:00
for (;;) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let stmtResult be the result of evaluating Statement.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto body_result = m_body->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// b. If LoopContinues(stmtResult, labelSet) is false, return ? UpdateEmpty(stmtResult, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (!loop_continues(body_result, label_set))
return body_result.update_empty(last_value);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// c. If stmtResult.[[Value]] is not empty, set V to stmtResult.[[Value]].
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (body_result.value().has_value())
last_value = *body_result.value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// d. Let exprRef be the result of evaluating Expression.
// e. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto test_result = TRY(m_test->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// f. If ToBoolean(exprValue) is false, return V.
LibJS: Check for exception after executing (do)while test expression Otherwise we crash the interpreter when an exception is thrown during evaluation of the while or do/while test expression - which is easily caused by a ReferenceError - e.g.: while (someUndefinedVariable) { // ... }
2020-10-23 00:40:14 +01:00
if (!test_result.to_boolean())
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
return last_value;
LibJS: Check for exception after executing (do)while test expression Otherwise we crash the interpreter when an exception is thrown during evaluation of the while or do/while test expression - which is easily caused by a ReferenceError - e.g.: while (someUndefinedVariable) { // ... }
2020-10-23 00:40:14 +01:00
}
LibJS: Add support for do..while statements
2020-04-04 21:29:23 +02:00
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
VERIFY_NOT_REACHED();
LibJS: Add support for do..while statements
2020-04-04 21:29:23 +02:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ForStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.4.2 Runtime Semantics: ForLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-forloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion ForStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Implement for statement
2020-03-12 23:12:12 +11:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// Note we don't always set a new environment but to use RAII we must do this here.
auto* old_environment = interpreter.lexical_environment();
LibJS: Evaluate for statements in their own scope if necessary We now evaluate for loops in their own scope if their init statement is a lexical declaration. Evaluating for loops in their own scope allow us to obtain expected behaviour, which means for example, that the block-scoped variables declared in a for statement will be limited to the scope of the for loop's body and statement and not to that of the current scope (i.e the one where the for statement was made)
2020-03-14 13:56:49 +02:00
LibJS: Add a fast path for creating per-iteration DeclarativeEnvironment The steps for creating a DeclarativeEnvironment for each iteration of a for-loop can be done equivalently to the spec without following the spec directly. For each binding creating in the loop's init expression, we: 1. Create a new binding in the new environment. 2. Grab the current value of the binding in the old environment. 3. Set the value in the new environment to the old value. This can be replaced by initializing the bindings vector in the new environment directly with the bindings in the old environment (but only copying the bindings of the init statement).
2022-03-09 15:37:10 -05:00
size_t per_iteration_bindings_size = 0;
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
GCPtr<DeclarativeEnvironment> loop_env;
LibJS: Clean up the anonymous wrapper block in "for" using ScopeGuard This ensures that we don't forget to pop the wrapper off of the scope stack when returning early due to an exception or some such. :^)
2020-04-05 00:24:32 +02:00
LibJS: Check for exceptions in a lot more places
2020-03-27 15:35:35 +01:00
if (m_init) {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
Declaration const* declaration = nullptr;
if (is<VariableDeclaration>(*m_init) && static_cast<VariableDeclaration const&>(*m_init).declaration_kind() != DeclarationKind::Var)
declaration = static_cast<VariableDeclaration const*>(m_init.ptr());
else if (is<UsingDeclaration>(*m_init))
declaration = static_cast<UsingDeclaration const*>(m_init.ptr());
if (declaration) {
loop_env = new_declarative_environment(*old_environment);
auto is_const = declaration->is_constant_declaration();
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_immutable_binding` and `create_mutable_binding` below,
// an exception should not result from `for_each_bound_name`.
MUST(declaration->for_each_bound_name([&](auto const& name) {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (is_const) {
MUST(loop_env->create_immutable_binding(vm, name, true));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
} else {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
MUST(loop_env->create_mutable_binding(vm, name, false));
LibJS: Add a fast path for creating per-iteration DeclarativeEnvironment The steps for creating a DeclarativeEnvironment for each iteration of a for-loop can be done equivalently to the spec without following the spec directly. For each binding creating in the loop's init expression, we: 1. Create a new binding in the new environment. 2. Grab the current value of the binding in the old environment. 3. Set the value in the new environment to the old value. This can be replaced by initializing the bindings vector in the new environment directly with the bindings in the old environment (but only copying the bindings of the init statement).
2022-03-09 15:37:10 -05:00
++per_iteration_bindings_size;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
interpreter.vm().running_execution_context().lexical_environment = loop_env;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
(void)TRY(m_init->execute(interpreter));
LibJS: Check for exceptions in a lot more places
2020-03-27 15:35:35 +01:00
}
LibJS: Implement for statement
2020-03-12 23:12:12 +11:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// 10. Let bodyResult be Completion(ForBodyEvaluation(the first Expression, the second Expression, Statement, perIterationLets, labelSet)).
auto body_result = for_body_evaluation(interpreter, label_set, per_iteration_bindings_size);
// 11. Set bodyResult to DisposeResources(loopEnv, bodyResult).
if (loop_env)
body_result = dispose_resources(vm, loop_env.ptr(), body_result);
// 12. Set the running execution context's LexicalEnvironment to oldEnv.
interpreter.vm().running_execution_context().lexical_environment = old_environment;
// 13. Return ? bodyResult.
return body_result;
}
// 14.7.4.3 ForBodyEvaluation ( test, increment, stmt, perIterationBindings, labelSet ), https://tc39.es/ecma262/#sec-forbodyevaluation
// 6.3.1.2 ForBodyEvaluation ( test, increment, stmt, perIterationBindings, labelSet ), https://tc39.es/proposal-explicit-resource-management/#sec-forbodyevaluation
Completion ForStatement::for_body_evaluation(JS::Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set, size_t per_iteration_bindings_size) const
{
auto& vm = interpreter.vm();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// 14.7.4.4 CreatePerIterationEnvironment ( perIterationBindings ), https://tc39.es/ecma262/#sec-createperiterationenvironment
LibJS: Use known binding indices when creating new for-loop environments When the initialization statement of a for-loop uses 'let', we must create a new environment for each iteration of the for loop. The bindings of the initialization statement are copied over to the new environment. Since the bindings are created in the same order each time, we can use that order to directly initialize the bindings and avoid any O(n) lookups in this hot loop.
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// NOTE: Our implementation of this AO is heavily dependent on DeclarativeEnvironment using a Vector with constant indices.
// For performance, we can take advantage of the fact that the declarations of the initialization statement are created
// in the same order each time CreatePerIterationEnvironment is invoked.
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
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auto create_per_iteration_environment = [&]() -> GCPtr<DeclarativeEnvironment> {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. If perIterationBindings has any elements, then
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (per_iteration_bindings_size == 0) {
// 2. Return unused.
return nullptr;
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let lastIterationEnv be the running execution context's LexicalEnvironment.
LibJS: Use known binding indices when creating new for-loop environments When the initialization statement of a for-loop uses 'let', we must create a new environment for each iteration of the for loop. The bindings of the initialization statement are copied over to the new environment. Since the bindings are created in the same order each time, we can use that order to directly initialize the bindings and avoid any O(n) lookups in this hot loop.
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auto* last_iteration_env = verify_cast<DeclarativeEnvironment>(interpreter.lexical_environment());
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// b. Let outer be lastIterationEnv.[[OuterEnv]].
// c. Assert: outer is not null.
LibJS: Add a fast path for creating per-iteration DeclarativeEnvironment The steps for creating a DeclarativeEnvironment for each iteration of a for-loop can be done equivalently to the spec without following the spec directly. For each binding creating in the loop's init expression, we: 1. Create a new binding in the new environment. 2. Grab the current value of the binding in the old environment. 3. Set the value in the new environment to the old value. This can be replaced by initializing the bindings vector in the new environment directly with the bindings in the old environment (but only copying the bindings of the init statement).
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VERIFY(last_iteration_env->outer_environment());
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// d. Let thisIterationEnv be NewDeclarativeEnvironment(outer).
LibJS: Add a fast path for creating per-iteration DeclarativeEnvironment The steps for creating a DeclarativeEnvironment for each iteration of a for-loop can be done equivalently to the spec without following the spec directly. For each binding creating in the loop's init expression, we: 1. Create a new binding in the new environment. 2. Grab the current value of the binding in the old environment. 3. Set the value in the new environment to the old value. This can be replaced by initializing the bindings vector in the new environment directly with the bindings in the old environment (but only copying the bindings of the init statement).
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auto this_iteration_env = DeclarativeEnvironment::create_for_per_iteration_bindings({}, *last_iteration_env, per_iteration_bindings_size);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// e. For each element bn of perIterationBindings, do
LibJS: Add a fast path for creating per-iteration DeclarativeEnvironment The steps for creating a DeclarativeEnvironment for each iteration of a for-loop can be done equivalently to the spec without following the spec directly. For each binding creating in the loop's init expression, we: 1. Create a new binding in the new environment. 2. Grab the current value of the binding in the old environment. 3. Set the value in the new environment to the old value. This can be replaced by initializing the bindings vector in the new environment directly with the bindings in the old environment (but only copying the bindings of the init statement).
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// i. Perform ! thisIterationEnv.CreateMutableBinding(bn, false).
// ii. Let lastValue be ? lastIterationEnv.GetBindingValue(bn, true).
// iii. Perform ! thisIterationEnv.InitializeBinding(bn, lastValue).
//
// NOTE: This is handled by DeclarativeEnvironment::create_for_per_iteration_bindings. Step e.ii indicates it may throw,
// but that is not possible. The potential for throwing was added to accommodate support for do-expressions in the
// initialization statement, but that idea was dropped: https://github.com/tc39/ecma262/issues/299#issuecomment-172950045
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// f. Set the running execution context's LexicalEnvironment to thisIterationEnv.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
interpreter.vm().running_execution_context().lexical_environment = this_iteration_env;
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// g. Return thisIterationEnv.
return this_iteration_env;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
};
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let V be undefined.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
auto last_value = js_undefined();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// 2. Let thisIterationEnv be ? CreatePerIterationEnvironment(perIterationBindings).
auto this_iteration_env = create_per_iteration_environment();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Repeat,
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
while (true) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. If test is not [empty], then
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (m_test) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// i. Let testRef be the result of evaluating test.
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// ii. Let testValue be Completion(GetValue(testRef)).
auto test_value = m_test->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// iii. If testValue is an abrupt completion, then
if (test_value.is_abrupt()) {
// 1. Return ? DisposeResources(thisIterationEnv, testValue).
return TRY(dispose_resources(vm, this_iteration_env, test_value));
}
// iv. Else,
// 1. Set testValue to testValue.[[Value]].
VERIFY(test_value.value().has_value());
// iii. If ToBoolean(testValue) is false, return ? DisposeResources(thisIterationEnv, Completion(V)).
if (!test_value.release_value().value().to_boolean())
return TRY(dispose_resources(vm, this_iteration_env, test_value));
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// b. Let result be the result of evaluating stmt.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = m_body->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// c. Perform ? DisposeResources(thisIterationEnv, result).
TRY(dispose_resources(vm, this_iteration_env, result));
// d. If LoopContinues(result, labelSet) is false, return ? UpdateEmpty(result, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (!loop_continues(result, label_set))
return result.update_empty(last_value);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// e. If result.[[Value]] is not empty, set V to result.[[Value]].
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (result.value().has_value())
last_value = *result.value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// f. Set thisIterationEnv to ? CreatePerIterationEnvironment(perIterationBindings).
this_iteration_env = create_per_iteration_environment();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// g. If increment is not [empty], then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (m_update) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// i. Let incRef be the result of evaluating increment.
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// ii. Let incrResult be Completion(GetValue(incrRef)).
auto inc_ref = m_update->execute(interpreter);
// ii. If incrResult is an abrupt completion, then
if (inc_ref.is_abrupt()) {
// 1. Return ? DisposeResources(thisIterationEnv, incrResult).
return TRY(dispose_resources(vm, this_iteration_env, inc_ref));
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
VERIFY_NOT_REACHED();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
struct ForInOfHeadState {
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
explicit ForInOfHeadState(Variant<NonnullRefPtr<ASTNode const>, NonnullRefPtr<BindingPattern const>> lhs)
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
lhs.visit(
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<ASTNode const>& ast_node) {
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
expression_lhs = ast_node.ptr();
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const>& pattern) {
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
pattern_lhs = pattern.ptr();
destructuring = true;
lhs_kind = Assignment;
});
}
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
ASTNode const* expression_lhs = nullptr;
BindingPattern const* pattern_lhs = nullptr;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
enum LhsKind {
Assignment,
VarBinding,
LexicalBinding
};
LhsKind lhs_kind = Assignment;
bool destructuring = false;
Value rhs_value;
// 14.7.5.7 ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] ), https://tc39.es/ecma262/#sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset
// Note: This is only steps 6.g through 6.j of the method because we currently implement for-in without an iterator so to prevent duplicated code we do this part here.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<void> execute_head(Interpreter& interpreter, Value next_value) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
VERIFY(!next_value.is_empty());
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto& vm = interpreter.vm();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Optional<Reference> lhs_reference;
LibJS: Convert new_declarative_environment() to NonnullGCPtr
2022-12-15 19:59:47 +00:00
GCPtr<Environment> iteration_environment;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// g. If lhsKind is either assignment or varBinding, then
if (lhs_kind == Assignment || lhs_kind == VarBinding) {
if (!destructuring) {
VERIFY(expression_lhs);
if (is<VariableDeclaration>(*expression_lhs)) {
auto& declaration = static_cast<VariableDeclaration const&>(*expression_lhs);
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(declaration.declarations().first()->target().has<NonnullRefPtr<Identifier const>>());
lhs_reference = TRY(declaration.declarations().first()->target().get<NonnullRefPtr<Identifier const>>()->to_reference(interpreter));
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
} else if (is<UsingDeclaration>(*expression_lhs)) {
auto& declaration = static_cast<UsingDeclaration const&>(*expression_lhs);
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(declaration.declarations().first()->target().has<NonnullRefPtr<Identifier const>>());
lhs_reference = TRY(declaration.declarations().first()->target().get<NonnullRefPtr<Identifier const>>()->to_reference(interpreter));
LibJS: Add support for "continue" inside "for" statements :^)
2020-04-05 00:22:42 +02:00
} else {
LibJS: Allow CallExpression as left hand side of for-of/for-in loops Although this will fail with a ReferenceError it should pass the parser and only fail if actually assigned to.
2022-02-17 01:23:10 +01:00
VERIFY(is<Identifier>(*expression_lhs) || is<MemberExpression>(*expression_lhs) || is<CallExpression>(*expression_lhs));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto& expression = static_cast<Expression const&>(*expression_lhs);
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
lhs_reference = TRY(expression.to_reference(interpreter));
LibJS: Add support for "continue" inside "for" statements :^)
2020-04-05 00:22:42 +02:00
}
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
// h. Else,
else {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
VERIFY(expression_lhs && (is<VariableDeclaration>(*expression_lhs) || is<UsingDeclaration>(*expression_lhs)));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
iteration_environment = new_declarative_environment(*interpreter.lexical_environment());
LibJS: Fix that constant declaration in for loop was mutable in body
2022-11-30 01:45:35 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
auto& for_declaration = static_cast<Declaration const&>(*expression_lhs);
DeprecatedFlyString first_name;
LibJS: Fix that constant declaration in for loop was mutable in body
2022-11-30 01:45:35 +01:00
// 14.7.5.4 Runtime Semantics: ForDeclarationBindingInstantiation, https://tc39.es/ecma262/#sec-runtime-semantics-fordeclarationbindinginstantiation
// 1. For each element name of the BoundNames of ForBinding, do
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_immutable_binding` and `create_mutable_binding` below,
// an exception should not result from `for_each_bound_name`.
MUST(for_declaration.for_each_bound_name([&](auto const& name) {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (first_name.is_empty())
first_name = name;
LibJS: Fix that constant declaration in for loop was mutable in body
2022-11-30 01:45:35 +01:00
// a. If IsConstantDeclaration of LetOrConst is true, then
if (for_declaration.is_constant_declaration()) {
// i. Perform ! environment.CreateImmutableBinding(name, true).
MUST(iteration_environment->create_immutable_binding(vm, name, true));
}
// b. Else,
else {
// i. Perform ! environment.CreateMutableBinding(name, false).
MUST(iteration_environment->create_mutable_binding(vm, name, false));
}
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
interpreter.vm().running_execution_context().lexical_environment = iteration_environment;
if (!destructuring) {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
VERIFY(!first_name.is_empty());
lhs_reference = MUST(interpreter.vm().resolve_binding(first_name));
LibJS: Check for exceptions in a lot more places
2020-03-27 15:35:35 +01:00
}
LibJS: Implement for statement
2020-03-12 23:12:12 +11:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// i. If destructuring is false, then
if (!destructuring) {
VERIFY(lhs_reference.has_value());
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (lhs_kind == LexicalBinding) {
// 2. If IsUsingDeclaration of lhs is true, then
if (is<UsingDeclaration>(expression_lhs)) {
// a. Let status be Completion(InitializeReferencedBinding(lhsRef, nextValue, sync-dispose)).
return lhs_reference->initialize_referenced_binding(vm, next_value, Environment::InitializeBindingHint::SyncDispose);
}
// 3. Else,
else {
// a. Let status be Completion(InitializeReferencedBinding(lhsRef, nextValue, normal)).
return lhs_reference->initialize_referenced_binding(vm, next_value, Environment::InitializeBindingHint::Normal);
}
} else {
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return lhs_reference->put_value(vm, next_value);
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
// j. Else,
if (lhs_kind == Assignment) {
VERIFY(pattern_lhs);
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
return interpreter.vm().destructuring_assignment_evaluation(*pattern_lhs, next_value);
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(expression_lhs && is<VariableDeclaration>(*expression_lhs));
auto& for_declaration = static_cast<VariableDeclaration const&>(*expression_lhs);
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto& binding_pattern = for_declaration.declarations().first()->target().get<NonnullRefPtr<BindingPattern const>>();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(lhs_kind == VarBinding || iteration_environment);
// At this point iteration_environment is undefined if lhs_kind == VarBinding which means this does both
// branch j.ii and j.iii because ForBindingInitialization is just a forwarding call to BindingInitialization.
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
return interpreter.vm().binding_initialization(binding_pattern, next_value, iteration_environment);
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
};
// 14.7.5.5 Runtime Semantics: ForInOfLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-forinofloopevaluation
// 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind ), https://tc39.es/ecma262/#sec-runtime-semantics-forinofheadevaluation
// This method combines ForInOfLoopEvaluation and ForIn/OfHeadEvaluation for similar reason as ForIn/OfBodyEvaluation, to prevent code duplication.
// For the same reason we also skip step 6 and 7 of ForIn/OfHeadEvaluation as this is done by the appropriate for loop type.
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
static ThrowCompletionOr<ForInOfHeadState> for_in_of_head_execute(Interpreter& interpreter, Variant<NonnullRefPtr<ASTNode const>, NonnullRefPtr<BindingPattern const>> lhs, Expression const& rhs)
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto& vm = interpreter.vm();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
ForInOfHeadState state(lhs);
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (auto* ast_ptr = lhs.get_pointer<NonnullRefPtr<ASTNode const>>(); ast_ptr && is<Declaration>(ast_ptr->ptr())) {
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// Runtime Semantics: ForInOfLoopEvaluation, for any of:
// ForInOfStatement : for ( var ForBinding in Expression ) Statement
// ForInOfStatement : for ( ForDeclaration in Expression ) Statement
// ForInOfStatement : for ( var ForBinding of AssignmentExpression ) Statement
// ForInOfStatement : for ( ForDeclaration of AssignmentExpression ) Statement
// 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind ), https://tc39.es/ecma262/#sec-runtime-semantics-forinofheadevaluation
Environment* new_environment = nullptr;
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (is<VariableDeclaration>(ast_ptr->ptr())) {
auto& variable_declaration = static_cast<VariableDeclaration const&>(*(*ast_ptr));
VERIFY(variable_declaration.declarations().size() == 1);
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
state.destructuring = variable_declaration.declarations().first()->target().has<NonnullRefPtr<BindingPattern const>>();
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (variable_declaration.declaration_kind() == DeclarationKind::Var) {
state.lhs_kind = ForInOfHeadState::VarBinding;
auto& variable = variable_declaration.declarations().first();
// B.3.5 Initializers in ForIn Statement Heads, https://tc39.es/ecma262/#sec-initializers-in-forin-statement-heads
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (variable->init()) {
VERIFY(variable->target().has<NonnullRefPtr<Identifier const>>());
auto& binding_id = variable->target().get<NonnullRefPtr<Identifier const>>()->string();
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
auto reference = TRY(interpreter.vm().resolve_binding(binding_id));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto result = TRY(interpreter.vm().named_evaluation_if_anonymous_function(*variable->init(), binding_id));
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
TRY(reference.put_value(vm, result));
}
} else {
state.lhs_kind = ForInOfHeadState::LexicalBinding;
new_environment = new_declarative_environment(*interpreter.lexical_environment());
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_mutable_binding` below, an exception should not result from `for_each_bound_name`.
MUST(variable_declaration.for_each_bound_name([&](auto const& name) {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
MUST(new_environment->create_mutable_binding(vm, name, false));
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
} else {
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
VERIFY(is<UsingDeclaration>(ast_ptr->ptr()));
auto& declaration = static_cast<UsingDeclaration const&>(*(*ast_ptr));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
state.lhs_kind = ForInOfHeadState::LexicalBinding;
new_environment = new_declarative_environment(*interpreter.lexical_environment());
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_mutable_binding` below, an exception should not result from `for_each_bound_name`.
MUST(declaration.for_each_bound_name([&](auto const& name) {
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(new_environment->create_mutable_binding(vm, name, false));
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
if (new_environment) {
// 2.d Set the running execution context's LexicalEnvironment to newEnv.
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
TemporaryChange<GCPtr<Environment>> scope_change(interpreter.vm().running_execution_context().lexical_environment, new_environment);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// 3. Let exprRef be the result of evaluating expr.
// 5. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
state.rhs_value = TRY(rhs.execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Fix two typos in comments in AST.cpp
2022-01-02 21:44:19 +01:00
// Note that since a reference stores its environment it doesn't matter we only reset
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// this after step 5. (Also we have no way of separating these steps at this point)
// 4. Set the running execution context's LexicalEnvironment to oldEnv.
} else {
// 3. Let exprRef be the result of evaluating expr.
// 5. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
state.rhs_value = TRY(rhs.execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
return state;
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// Runtime Semantics: ForInOfLoopEvaluation, for any of:
// ForInOfStatement : for ( LeftHandSideExpression in Expression ) Statement
// ForInOfStatement : for ( LeftHandSideExpression of AssignmentExpression ) Statement
// 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind ), https://tc39.es/ecma262/#sec-runtime-semantics-forinofheadevaluation
// We can skip step 1, 2 and 4 here (on top of already skipping step 6 and 7).
// 3. Let exprRef be the result of evaluating expr.
// 5. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
state.rhs_value = TRY(rhs.execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return state;
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ForInStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.5.5 Runtime Semantics: ForInOfLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-forinofloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion ForInStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto for_in_head_state = TRY(for_in_of_head_execute(interpreter, m_lhs, *m_rhs));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto rhs_result = for_in_head_state.rhs_value;
// 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind ), https://tc39.es/ecma262/#sec-runtime-semantics-forinofheadevaluation
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. If exprValue is undefined or null, then
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (rhs_result.is_nullish()) {
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// i. Return Completion Record { [[Type]]: break, [[Value]]: empty, [[Target]]: empty }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Break, {}, {} };
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// b. Let obj be ! ToObject(exprValue).
LibJS: Port Value::to_object() to NonnullGCPtr
2023-04-13 15:26:41 +02:00
auto object = MUST(rhs_result.to_object(vm));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// 14.7.5.7 ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] ), https://tc39.es/ecma262/#sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Let oldEnv be the running execution context's LexicalEnvironment.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Environment* old_environment = interpreter.lexical_environment();
auto restore_scope = ScopeGuard([&] {
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
});
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Let V be undefined.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto last_value = js_undefined();
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
auto result = object->enumerate_object_properties([&](auto value) -> Optional<Completion> {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
TRY(for_in_head_state.execute_head(interpreter, value));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
// l. Let result be the result of evaluating stmt.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = m_body->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// NOTE: Because of optimizations we only create a new lexical environment if there are bindings
// so we should only dispose if that is the case.
if (vm.running_execution_context().lexical_environment != old_environment) {
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
VERIFY(is<DeclarativeEnvironment>(*vm.running_execution_context().lexical_environment));
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// m. Set result to DisposeResources(iterationEnv, result).
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
result = dispose_resources(vm, static_cast<DeclarativeEnvironment*>(vm.running_execution_context().lexical_environment.ptr()), result);
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
}
// n. Set the running execution context's LexicalEnvironment to oldEnv.
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// o. If LoopContinues(result, labelSet) is false, then
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
if (!loop_continues(result, label_set)) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return UpdateEmpty(result, V).
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
return result.update_empty(last_value);
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
// p. If result.[[Value]] is not empty, set V to result.[[Value]].
LibJS: Bring ForIn body evaluation closer to the specification This fixes 2 bugs in our current implementation: * Properties deleted during iteration were still being iterated * Properties with the same name in both the object and it's prototype were iterated twice
2022-03-29 00:18:39 +03:00
if (result.value().has_value())
last_value = *result.value();
return {};
});
return result.value_or(last_value);
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ForOfStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.5.5 Runtime Semantics: ForInOfLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-forinofloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion ForOfStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto for_of_head_state = TRY(for_in_of_head_execute(interpreter, m_lhs, m_rhs));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto rhs_result = for_of_head_state.rhs_value;
// 14.7.5.7 ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] ), https://tc39.es/ecma262/#sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset
// We use get_iterator_values which behaves like ForIn/OfBodyEvaluation with iteratorKind iterate.
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Let oldEnv be the running execution context's LexicalEnvironment.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Environment* old_environment = interpreter.lexical_environment();
auto restore_scope = ScopeGuard([&] {
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
});
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Let V be undefined.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
auto last_value = js_undefined();
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
Optional<Completion> status;
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
(void)TRY(get_iterator_values(vm, rhs_result, [&](Value value) -> Optional<Completion> {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
TRY(for_of_head_state.execute_head(interpreter, value));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// l. Let result be the result of evaluating stmt.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = m_body->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
if (vm.running_execution_context().lexical_environment != old_environment) {
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
VERIFY(is<DeclarativeEnvironment>(*vm.running_execution_context().lexical_environment));
result = dispose_resources(vm, static_cast<DeclarativeEnvironment*>(vm.running_execution_context().lexical_environment.ptr()), result);
LibJS: Add using declaration support in for and for of loops The using declarations have kind of special behavior in for loops so this is seperated.
2022-12-23 01:45:29 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// m. Set the running execution context's LexicalEnvironment to oldEnv.
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// n. If LoopContinues(result, labelSet) is false, then
if (!loop_continues(result, label_set)) {
// 2. Set status to UpdateEmpty(result, V).
status = result.update_empty(last_value);
// 4. Return ? IteratorClose(iteratorRecord, status).
// NOTE: This is done by returning a completion from the callback.
return status;
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// o. If result.[[Value]] is not empty, set V to result.[[Value]].
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (result.value().has_value())
last_value = *result.value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Integrate iterator protocol into language features Finally use Symbol.iterator protocol in language features :) currently only used in for-of loops and spread expressions, but will have more uses later (Maps, Sets, Array.from, etc).
2020-07-13 08:27:20 -07:00
return {};
LibJS: Convert get_iterator_values helper to ThrowCompletionOr This one is a bit unusual, so to clarify: Previously, callers of get_iterator_values() would supply a callback that would return an IterationDecision, and an enum to indicate whether iterator_close() should be invoked upon IterationDecision::Break. Now, use of both those enums is removed, and callers must return an Optional<Completion>. If a Completion is provided, the iterator will be closed, and that completion will be returned from get_iterator_values. Otherwise, once the iterator is exhausted, a default-initialized Completion will be returned.
2021-10-20 12:10:23 -04:00
}));
LibJS: Integrate iterator protocol into language features Finally use Symbol.iterator protocol in language features :) currently only used in for-of loops and spread expressions, but will have more uses later (Maps, Sets, Array.from, etc).
2020-07-13 08:27:20 -07:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// Return `status` set during step n.2. in the callback, or...
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// e. If done is true, return V.
return status.value_or(last_value);
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : IterationStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ForAwaitOfStatement::execute(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
// 14.7.5.5 Runtime Semantics: ForInOfLoopEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-forinofloopevaluation
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Completion ForAwaitOfStatement::loop_evaluation(Interpreter& interpreter, Vector<DeprecatedFlyString> const& label_set) const
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto& vm = interpreter.vm();
LibJS: Implement parsing and executing for-await-of loops
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// 14.7.5.6 ForIn/OfHeadEvaluation ( uninitializedBoundNames, expr, iterationKind ), https://tc39.es/ecma262/#sec-runtime-semantics-forinofheadevaluation
// Note: Performs only steps 1 through 5.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto for_of_head_state = TRY(for_in_of_head_execute(interpreter, m_lhs, m_rhs));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
auto rhs_result = for_of_head_state.rhs_value;
// NOTE: Perform step 7 from ForIn/OfHeadEvaluation. And since this is always async we only have to do step 7.d.
// d. Return ? GetIterator(exprValue, iteratorHint).
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto iterator = TRY(get_iterator(vm, rhs_result, IteratorHint::Async));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// 14.7.5.7 ForIn/OfBodyEvaluation ( lhs, stmt, iteratorRecord, iterationKind, lhsKind, labelSet [ , iteratorKind ] ), https://tc39.es/ecma262/#sec-runtime-semantics-forin-div-ofbodyevaluation-lhs-stmt-iterator-lhskind-labelset
// NOTE: Here iteratorKind is always async.
// 2. Let oldEnv be the running execution context's LexicalEnvironment.
Environment* old_environment = interpreter.lexical_environment();
auto restore_scope = ScopeGuard([&] {
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Implement parsing and executing for-await-of loops
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});
// 3. Let V be undefined.
auto last_value = js_undefined();
// NOTE: Step 4 and 5 are just extracting properties from the head which is done already in for_in_of_head_execute.
// And these are only used in step 6.g through 6.k which is done with for_of_head_state.execute_head.
// 6. Repeat,
while (true) {
// a. Let nextResult be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto next_result = TRY(call(vm, iterator.next_method, iterator.iterator));
LibJS: Implement proper Iterator records Instead of using plain objects as Iterator records, causes confusion about the object itself actually being its [[Iterator]] slot, and requires non-standard type conversion shenanigans fpr the [[NextValue]] and [[Done]] internal slots, implement a proper Iterator record struct and use it throughout. Also annotate the remaining Iterator AOs with spec comments while we're here.
2022-01-09 19:12:24 +01:00
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// b. If iteratorKind is async, set nextResult to ? Await(nextResult).
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
next_result = TRY(await(vm, next_result));
LibJS: Implement proper Iterator records Instead of using plain objects as Iterator records, causes confusion about the object itself actually being its [[Iterator]] slot, and requires non-standard type conversion shenanigans fpr the [[NextValue]] and [[Done]] internal slots, implement a proper Iterator record struct and use it throughout. Also annotate the remaining Iterator AOs with spec comments while we're here.
2022-01-09 19:12:24 +01:00
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// c. If Type(nextResult) is not Object, throw a TypeError exception.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!next_result.is_object())
LibJS: Remove GlobalObject from VM::throw_completion() This is a continuation of the previous five commits. A first big step into the direction of no longer having to pass a realm (or currently, a global object) trough layers upon layers of AOs! Unlike the create() APIs we can safely assume that this is only ever called when a running execution context and therefore current realm exists. If not, you can always manually allocate the Error and put it in a Completion :^) In the spec, throw exceptions implicitly use the current realm's intrinsics as well: https://tc39.es/ecma262/#sec-throw-an-exception
2022-08-16 20:33:17 +01:00
return vm.throw_completion<TypeError>(ErrorType::IterableNextBadReturn);
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// d. Let done be ? IteratorComplete(nextResult).
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto done = TRY(iterator_complete(vm, next_result.as_object()));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// e. If done is true, return V.
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
if (done)
return last_value;
// f. Let nextValue be ? IteratorValue(nextResult).
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto next_value = TRY(iterator_value(vm, next_result.as_object()));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// NOTE: This performs steps g. through to k.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
TRY(for_of_head_state.execute_head(interpreter, next_value));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// l. Let result be the result of evaluating stmt.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = m_body->execute(interpreter);
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// m. Set the running execution context's LexicalEnvironment to oldEnv.
interpreter.vm().running_execution_context().lexical_environment = old_environment;
// n. If LoopContinues(result, labelSet) is false, then
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (!loop_continues(result, label_set)) {
// 2. Set status to UpdateEmpty(result, V).
auto status = result.update_empty(last_value);
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
// 3. If iteratorKind is async, return ? AsyncIteratorClose(iteratorRecord, status).
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
return async_iterator_close(vm, iterator, move(status));
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
}
// o. If result.[[Value]] is not empty, set V to result.[[Value]].
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (result.value().has_value())
last_value = *result.value();
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
}
VERIFY_NOT_REACHED();
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.6.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-exp-operator-runtime-semantics-evaluation
// 13.7.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-multiplicative-operators-runtime-semantics-evaluation
// 13.8.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-addition-operator-plus-runtime-semantics-evaluation
// 13.8.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-subtraction-operator-minus-runtime-semantics-evaluation
// 13.9.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-left-shift-operator-runtime-semantics-evaluation
// 13.9.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-signed-right-shift-operator-runtime-semantics-evaluation
// 13.9.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-unsigned-right-shift-operator-runtime-semantics-evaluation
// 13.10.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-relational-operators-runtime-semantics-evaluation
// 13.11.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-equality-operators-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion BinaryExpression::execute(Interpreter& interpreter) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add support for the '#privateName in obj' expression
2021-10-14 02:05:24 +02:00
// Special case in which we cannot execute the lhs. RelationalExpression : PrivateIdentifier in ShiftExpression
// RelationalExpression : PrivateIdentifier in ShiftExpression, https://tc39.es/ecma262/#sec-relational-operators-runtime-semantics-evaluation
if (m_op == BinaryOp::In && is<PrivateIdentifier>(*m_lhs)) {
auto& private_identifier = static_cast<PrivateIdentifier const&>(*m_lhs).string();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!rhs_result.is_object())
LibJS: Remove GlobalObject from VM::throw_completion() This is a continuation of the previous five commits. A first big step into the direction of no longer having to pass a realm (or currently, a global object) trough layers upon layers of AOs! Unlike the create() APIs we can safely assume that this is only ever called when a running execution context and therefore current realm exists. If not, you can always manually allocate the Error and put it in a Completion :^) In the spec, throw exceptions implicitly use the current realm's intrinsics as well: https://tc39.es/ecma262/#sec-throw-an-exception
2022-08-16 20:33:17 +01:00
return interpreter.vm().throw_completion<TypeError>(ErrorType::InOperatorWithObject);
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto private_environment = interpreter.vm().running_execution_context().private_environment;
LibJS: Add support for the '#privateName in obj' expression
2021-10-14 02:05:24 +02:00
VERIFY(private_environment);
auto private_name = private_environment->resolve_private_identifier(private_identifier);
return Value(rhs_result.as_object().private_element_find(private_name) != nullptr);
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto lhs_result = TRY(m_lhs->execute(interpreter)).release_value();
auto rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
switch (m_op) {
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Addition:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(add(vm, lhs_result, rhs_result));
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Subtraction:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(sub(vm, lhs_result, rhs_result));
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Multiplication:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(mul(vm, lhs_result, rhs_result));
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Division:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(div(vm, lhs_result, rhs_result));
LibJS: Add basic support for modulo (%) in binary expressions
2020-04-04 21:17:34 +02:00
case BinaryOp::Modulo:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(mod(vm, lhs_result, rhs_result));
LibJS: Implement exponentiation (** operator)
2020-04-05 13:40:00 +01:00
case BinaryOp::Exponentiation:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(exp(vm, lhs_result, rhs_result));
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::StrictlyEquals:
LibJS: Rename strict_eq() to is_strictly_equal() This got turned into a proper AO with a new name recently. See: https://github.com/tc39/ecma262/commit/19d7ca4
2021-09-23 23:43:28 +02:00
return Value(is_strictly_equal(lhs_result, rhs_result));
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::StrictlyInequals:
LibJS: Rename strict_eq() to is_strictly_equal() This got turned into a proper AO with a new name recently. See: https://github.com/tc39/ecma262/commit/19d7ca4
2021-09-23 23:43:28 +02:00
return Value(!is_strictly_equal(lhs_result, rhs_result));
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::LooselyEquals:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return Value(TRY(is_loosely_equal(vm, lhs_result, rhs_result)));
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::LooselyInequals:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return Value(!TRY(is_loosely_equal(vm, lhs_result, rhs_result)));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::GreaterThan:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(greater_than(vm, lhs_result, rhs_result));
LibJS: Implement <= and >= binary operators
2020-03-12 23:07:08 +11:00
case BinaryOp::GreaterThanEquals:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(greater_than_equals(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::LessThan:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(less_than(vm, lhs_result, rhs_result));
LibJS: Implement <= and >= binary operators
2020-03-12 23:07:08 +11:00
case BinaryOp::LessThanEquals:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(less_than_equals(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseAnd:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(bitwise_and(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseOr:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(bitwise_or(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseXor:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(bitwise_xor(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::LeftShift:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(left_shift(vm, lhs_result, rhs_result));
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::RightShift:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(right_shift(vm, lhs_result, rhs_result));
LibJS: Implement bitwise unsigned right shift operator (>>>)
2020-04-23 15:43:10 +01:00
case BinaryOp::UnsignedRightShift:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(unsigned_right_shift(vm, lhs_result, rhs_result));
LibJS: Implement 'in' operator
2020-04-23 16:06:01 +01:00
case BinaryOp::In:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(in(vm, lhs_result, rhs_result));
LibJS: Implement the "instanceof" operator This operator walks the prototype chain of the RHS value and looks for a "prototype" property with the same value as the prototype of the LHS. This is pretty cool. :^)
2020-03-28 16:56:54 +01:00
case BinaryOp::InstanceOf:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(instance_of(vm, lhs_result, rhs_result));
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
}
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
}
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.13.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-binary-logical-operators-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion LogicalExpression::execute(Interpreter& interpreter) const
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let lref be the result of evaluating <Expression>.
// 2. Let lval be ? GetValue(lref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto lhs_result = TRY(m_lhs->execute(interpreter)).release_value();
LibJS: Add short circuit logical evaluation When evaluating logical binop expressions, the rhs must not be evaluated if the lhs leads to the whole expression not being truthy.
2020-04-03 19:11:31 +02:00
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
switch (m_op) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// LogicalANDExpression : LogicalANDExpression && BitwiseORExpression
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
case LogicalOp::And:
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let lbool be ToBoolean(lval).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. If lbool is false, return lval.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
if (!lhs_result.to_boolean())
return lhs_result;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. Let rref be the result of evaluating BitwiseORExpression.
// 6. Return ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_rhs->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// LogicalORExpression : LogicalORExpression || LogicalANDExpression
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
case LogicalOp::Or:
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let lbool be ToBoolean(lval).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. If lbool is true, return lval.
LibJS: Fix logical expressions The current implementation of logical AND (&&) and logical OR (||) always returns a boolean - this is not correct.
2020-04-03 14:33:28 +01:00
if (lhs_result.to_boolean())
LibJS: Implement nullish coalescing operator (??)
2020-04-18 00:49:11 +01:00
return lhs_result;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. Let rref be the result of evaluating LogicalANDExpression.
// 6. Return ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_rhs->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// CoalesceExpression : CoalesceExpressionHead ?? BitwiseORExpression
LibJS: Implement nullish coalescing operator (??)
2020-04-18 00:49:11 +01:00
case LogicalOp::NullishCoalescing:
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. If lval is undefined or null, then
if (lhs_result.is_nullish()) {
// a. Let rref be the result of evaluating BitwiseORExpression.
// b. Return ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_rhs->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 4. Otherwise, return lval.
LibJS: Implement nullish coalescing operator (??)
2020-04-18 00:49:11 +01:00
return lhs_result;
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<Reference> Expression::to_reference(Interpreter&) const
LibJS: Add Reference class to represent a base.property reference Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
2020-04-27 12:10:16 +02:00
{
LibJS: Convert to_reference() to ThrowCompletionOr
2021-12-30 23:29:56 +01:00
return Reference {};
LibJS: Add Reference class to represent a base.property reference Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
2020-04-27 12:10:16 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<Reference> Identifier::to_reference(Interpreter& interpreter) const
LibJS: Allow "delete someGlobalVariable" This is solved by allowing Identifier nodes to produce a Reference with the global object as base.
2020-04-27 12:37:27 +02:00
{
LibJS: Shrink Identifier's environment coordinate cache This patch does two things: - We now use u32 instead of size_t for the hops and index fields in EnvironmentCoordinate. This means we're limited to an environment nesting level and variable count of 4Gs respectively. - Instead of wrapping it in an Optional, EnvironmentCoordinate now has a custom valid/invalid state using a magic marker value. These two changes reduce the size of Identifier by 16 bytes. :^)
2022-11-21 18:01:22 +01:00
if (m_cached_environment_coordinate.is_valid()) {
LibJS: Cache access to bindings in the global environment This patch adds a special EnvironmentCoordinate::global_marker value that signifies that a binding lookup ended up searching the global environment. It doesn't matter if we find it there or not, the global marker is always returned. This allows us to bypass other environments on subsequent access, going directly to the global environment.
2022-11-10 20:55:03 +01:00
Environment* environment = nullptr;
LibJS: Invalidate cached environment coordinate after delete in global Fixes the bug in interpreter when cached environment coordinate is not invalidated after `delete` operator usage on global `this`.
2023-06-24 15:24:19 +03:00
bool coordinate_screwed_by_delete_in_global_environment = false;
LibJS: Shrink Identifier's environment coordinate cache This patch does two things: - We now use u32 instead of size_t for the hops and index fields in EnvironmentCoordinate. This means we're limited to an environment nesting level and variable count of 4Gs respectively. - Instead of wrapping it in an Optional, EnvironmentCoordinate now has a custom valid/invalid state using a magic marker value. These two changes reduce the size of Identifier by 16 bytes. :^)
2022-11-21 18:01:22 +01:00
if (m_cached_environment_coordinate.index == EnvironmentCoordinate::global_marker) {
LibJS: Cache access to bindings in the global environment This patch adds a special EnvironmentCoordinate::global_marker value that signifies that a binding lookup ended up searching the global environment. It doesn't matter if we find it there or not, the global marker is always returned. This allows us to bypass other environments on subsequent access, going directly to the global environment.
2022-11-10 20:55:03 +01:00
environment = &interpreter.vm().current_realm()->global_environment();
LibJS: Invalidate cached environment coordinate after delete in global Fixes the bug in interpreter when cached environment coordinate is not invalidated after `delete` operator usage on global `this`.
2023-06-24 15:24:19 +03:00
coordinate_screwed_by_delete_in_global_environment = !TRY(environment->has_binding(string()));
LibJS: Cache access to bindings in the global environment This patch adds a special EnvironmentCoordinate::global_marker value that signifies that a binding lookup ended up searching the global environment. It doesn't matter if we find it there or not, the global marker is always returned. This allows us to bypass other environments on subsequent access, going directly to the global environment.
2022-11-10 20:55:03 +01:00
} else {
environment = interpreter.vm().running_execution_context().lexical_environment;
LibJS: Shrink Identifier's environment coordinate cache This patch does two things: - We now use u32 instead of size_t for the hops and index fields in EnvironmentCoordinate. This means we're limited to an environment nesting level and variable count of 4Gs respectively. - Instead of wrapping it in an Optional, EnvironmentCoordinate now has a custom valid/invalid state using a magic marker value. These two changes reduce the size of Identifier by 16 bytes. :^)
2022-11-21 18:01:22 +01:00
for (size_t i = 0; i < m_cached_environment_coordinate.hops; ++i)
LibJS: Cache access to bindings in the global environment This patch adds a special EnvironmentCoordinate::global_marker value that signifies that a binding lookup ended up searching the global environment. It doesn't matter if we find it there or not, the global marker is always returned. This allows us to bypass other environments on subsequent access, going directly to the global environment.
2022-11-10 20:55:03 +01:00
environment = environment->outer_environment();
VERIFY(environment);
VERIFY(environment->is_declarative_environment());
}
LibJS: Invalidate cached environment coordinate after delete in global Fixes the bug in interpreter when cached environment coordinate is not invalidated after `delete` operator usage on global `this`.
2023-06-24 15:24:19 +03:00
if (!coordinate_screwed_by_delete_in_global_environment && !environment->is_permanently_screwed_by_eval()) {
LibJS: Fast non-local variable access :^) This patch introduces the "environment coordinate" concept, which encodes the distance from a variable access to the binding it ends up resolving to. EnvironmentCoordinate has two fields: - hops: The number of hops up the lexical environment chain we have to make before getting to the resolved binding. - index: The index of the resolved binding within its declarative environment record. Whenever a variable lookup resolves somewhere inside a declarative environment, we now cache the coordinates and reuse them in subsequent lookups. This is achieved via a coordinate cache in JS::Identifier. Note that non-strict direct eval() breaks this optimization and so it will not be performed if the resolved environment has been permanently screwed by eval(). This makes variable access *significantly* faster. :^)
2021-10-07 01:06:21 +02:00
return Reference { *environment, string(), interpreter.vm().in_strict_mode(), m_cached_environment_coordinate };
LibJS: Make accessing the current function's arguments cheaper Instead of going through an environment record, make arguments of the currently executing function generate references via the argument index, which can later be resolved directly through the ExecutionContext.
2021-10-07 20:13:22 +03:30
}
LibJS: Fast non-local variable access :^) This patch introduces the "environment coordinate" concept, which encodes the distance from a variable access to the binding it ends up resolving to. EnvironmentCoordinate has two fields: - hops: The number of hops up the lexical environment chain we have to make before getting to the resolved binding. - index: The index of the resolved binding within its declarative environment record. Whenever a variable lookup resolves somewhere inside a declarative environment, we now cache the coordinates and reuse them in subsequent lookups. This is achieved via a coordinate cache in JS::Identifier. Note that non-strict direct eval() breaks this optimization and so it will not be performed if the resolved environment has been permanently screwed by eval(). This makes variable access *significantly* faster. :^)
2021-10-07 01:06:21 +02:00
m_cached_environment_coordinate = {};
}
LibJS: Make accessing the current function's arguments cheaper Instead of going through an environment record, make arguments of the currently executing function generate references via the argument index, which can later be resolved directly through the ExecutionContext.
2021-10-07 20:13:22 +03:30
LibJS: Convert to_reference() to ThrowCompletionOr
2021-12-30 23:29:56 +01:00
auto reference = TRY(interpreter.vm().resolve_binding(string()));
LibJS: Fast non-local variable access :^) This patch introduces the "environment coordinate" concept, which encodes the distance from a variable access to the binding it ends up resolving to. EnvironmentCoordinate has two fields: - hops: The number of hops up the lexical environment chain we have to make before getting to the resolved binding. - index: The index of the resolved binding within its declarative environment record. Whenever a variable lookup resolves somewhere inside a declarative environment, we now cache the coordinates and reuse them in subsequent lookups. This is achieved via a coordinate cache in JS::Identifier. Note that non-strict direct eval() breaks this optimization and so it will not be performed if the resolved environment has been permanently screwed by eval(). This makes variable access *significantly* faster. :^)
2021-10-07 01:06:21 +02:00
if (reference.environment_coordinate().has_value())
LibJS: Shrink Identifier's environment coordinate cache This patch does two things: - We now use u32 instead of size_t for the hops and index fields in EnvironmentCoordinate. This means we're limited to an environment nesting level and variable count of 4Gs respectively. - Instead of wrapping it in an Optional, EnvironmentCoordinate now has a custom valid/invalid state using a magic marker value. These two changes reduce the size of Identifier by 16 bytes. :^)
2022-11-21 18:01:22 +01:00
m_cached_environment_coordinate = reference.environment_coordinate().value();
LibJS: Fast non-local variable access :^) This patch introduces the "environment coordinate" concept, which encodes the distance from a variable access to the binding it ends up resolving to. EnvironmentCoordinate has two fields: - hops: The number of hops up the lexical environment chain we have to make before getting to the resolved binding. - index: The index of the resolved binding within its declarative environment record. Whenever a variable lookup resolves somewhere inside a declarative environment, we now cache the coordinates and reuse them in subsequent lookups. This is achieved via a coordinate cache in JS::Identifier. Note that non-strict direct eval() breaks this optimization and so it will not be performed if the resolved environment has been permanently screwed by eval(). This makes variable access *significantly* faster. :^)
2021-10-07 01:06:21 +02:00
return reference;
LibJS: Allow "delete someGlobalVariable" This is solved by allowing Identifier nodes to produce a Reference with the global object as base.
2020-04-27 12:37:27 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<Reference> MemberExpression::to_reference(Interpreter& interpreter) const
LibJS: Add Reference class to represent a base.property reference Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
2020-04-27 12:10:16 +02:00
{
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
// 13.3.7.1 Runtime Semantics: Evaluation
// SuperProperty : super [ Expression ]
// SuperProperty : super . IdentifierName
// https://tc39.es/ecma262/#sec-super-keyword-runtime-semantics-evaluation
if (is<SuperExpression>(object())) {
// 1. Let env be GetThisEnvironment().
LibJS: Convert get_this_environment() to NonnullGCPtr
2022-12-15 20:07:13 +00:00
auto environment = get_this_environment(vm);
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
// 2. Let actualThis be ? env.GetThisBinding().
LibJS: Convert get_this_environment() to NonnullGCPtr
2022-12-15 20:07:13 +00:00
auto actual_this = TRY(environment->get_this_binding(vm));
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
LibJS: Use PropertyKey in MemberExpression::to_reference()
2021-10-24 16:06:07 +02:00
PropertyKey property_key;
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
if (is_computed()) {
// SuperProperty : super [ Expression ]
// 3. Let propertyNameReference be the result of evaluating Expression.
// 4. Let propertyNameValue be ? GetValue(propertyNameReference).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto property_name_value = TRY(m_property->execute(interpreter)).release_value();
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
// 5. Let propertyKey be ? ToPropertyKey(propertyNameValue).
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
property_key = TRY(property_name_value.to_property_key(vm));
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
} else {
// SuperProperty : super . IdentifierName
// 3. Let propertyKey be StringValue of IdentifierName.
VERIFY(is<Identifier>(property()));
property_key = static_cast<Identifier const&>(property()).string();
}
LibJS: Update a couple of outdated spec comments These are editorial changes in the ECMA-262 spec. See: - https://github.com/tc39/ecma262/commit/e080a7f - https://github.com/tc39/ecma262/commit/c5a9094 - https://github.com/tc39/ecma262/commit/5091520 - https://github.com/tc39/ecma262/commit/1c6564b - https://github.com/tc39/ecma262/commit/e06c80c
2022-04-30 22:22:52 +02:00
// 6. If the source text matched by this SuperProperty is strict mode code, let strict be true; else let strict be false.
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
bool strict = interpreter.vm().in_strict_mode();
// 7. Return ? MakeSuperPropertyReference(actualThis, propertyKey, strict).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
return TRY(make_super_property_reference(vm, actual_this, property_key, strict));
LibJS: Bring the `super` keyword in line with the spec This patch implements spec-compliant runtime semantics for the following constructs: - super.property - super[property] The MakeSuperPropertyReference AO is added to support this. :^)
2021-07-03 00:20:52 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto base_reference = TRY(m_object->to_reference(interpreter));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Value base_value;
if (base_reference.is_valid_reference())
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
base_value = TRY(base_reference.get_value(vm));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
else
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
base_value = TRY(m_object->execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(!base_value.is_empty());
LibJS: Bring Reference records a bit closer to the ECMAScript spec Our Reference class now has the same fields as the spec: - Base (a non-nullish value, an environment record, or `unresolvable`) - Referenced Name (the name of the binding) - Strict (whether the reference originated in strict mode code) - ThisValue (if non-empty, the reference represents a `super` keyword) The main difference from before is that we now resolve the environment record that a reference interacts with. Previously we simply resolved to either "local variable" or "global variable". The associated abstract operations are still largely non-conforming, since we don't yet implement proper variable bindings. But this patch should at least fix a handful of test262 cases. :^) There's one minor regression: some TypeError message strings get a little worse due to doing a RequireObjectCoercible earlier in the evaluation of MemberExpression.
2021-06-25 16:27:59 +02:00
LibJS: Rewrite most of Object for spec compliance :^) This is a huge patch, I know. In hindsight this perhaps could've been done slightly more incremental, but I started and then fixed everything until it worked, and here we are. I tried splitting of some completely unrelated changes into separate commits, however. Anyway. This is a rewrite of most of Object, and by extension large parts of Array, Proxy, Reflect, String, TypedArray, and some other things. What we already had worked fine for about 90% of things, but getting the last 10% right proved to be increasingly difficult with the current code that sort of grew organically and is only very loosely based on the spec - this became especially obvious when we started fixing a large number of test262 failures. Key changes include: - 1:1 matching function names and parameters of all object-related functions, to avoid ambiguity. Previously we had things like put(), which the spec doesn't have - as a result it wasn't always clear which need to be used. - Better separation between object abstract operations and internal methods - the former are always the same, the latter can be overridden (and are therefore virtual). The internal methods (i.e. [[Foo]] in the spec) are now prefixed with 'internal_' for clarity - again, it was previously not always clear which AO a certain method represents, get() could've been both Get and [[Get]] (I don't know which one it was closer to right now). Note that some of the old names have been kept until all code relying on them is updated, but they are now simple wrappers around the closest matching standard abstract operation. - Simplifications of the storage layer: functions that write values to storage are now prefixed with 'storage_' to make their purpose clear, and as they are not part of the spec they should not contain any steps specified by it. Much functionality is now covered by the layers above it and was removed (e.g. handling of accessors, attribute checks). - PropertyAttributes has been greatly simplified, and is being replaced by PropertyDescriptor - a concept similar to the current implementation, but more aligned with the actual spec. See the commit message of the previous commit where it was introduced for details. - As a bonus, and since I had to look at the spec a whole lot anyway, I introduced more inline comments with the exact steps from the spec - this makes it super easy to verify correctness. - East-const all the things. As a result of all of this, things are much more correct but a bit slower now. Retaining speed wasn't a consideration at all, I have done no profiling of the new code - there might be low hanging fruits, which we can then harvest separately. Special thanks to Idan for helping me with this by tracking down bugs, updating everything outside of LibJS to work with these changes (LibWeb, Spreadsheet, HackStudio), as well as providing countless patches to fix regressions I introduced - there still are very few (we got it down to 5), but we also get many new passing test262 tests in return. :^) Co-authored-by: Idan Horowitz <idan.horowitz@gmail.com>
2021-07-04 18:14:16 +01:00
// From here on equivalent to
// 13.3.4 EvaluatePropertyAccessWithIdentifierKey ( baseValue, identifierName, strict ), https://tc39.es/ecma262/#sec-evaluate-property-access-with-identifier-key
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
PropertyKey property_key;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (is_computed()) {
// Weird order which I can't quite find from the specs.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(m_property->execute(interpreter)).release_value();
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
VERIFY(!value.is_empty());
LibJS: Rewrite most of Object for spec compliance :^) This is a huge patch, I know. In hindsight this perhaps could've been done slightly more incremental, but I started and then fixed everything until it worked, and here we are. I tried splitting of some completely unrelated changes into separate commits, however. Anyway. This is a rewrite of most of Object, and by extension large parts of Array, Proxy, Reflect, String, TypedArray, and some other things. What we already had worked fine for about 90% of things, but getting the last 10% right proved to be increasingly difficult with the current code that sort of grew organically and is only very loosely based on the spec - this became especially obvious when we started fixing a large number of test262 failures. Key changes include: - 1:1 matching function names and parameters of all object-related functions, to avoid ambiguity. Previously we had things like put(), which the spec doesn't have - as a result it wasn't always clear which need to be used. - Better separation between object abstract operations and internal methods - the former are always the same, the latter can be overridden (and are therefore virtual). The internal methods (i.e. [[Foo]] in the spec) are now prefixed with 'internal_' for clarity - again, it was previously not always clear which AO a certain method represents, get() could've been both Get and [[Get]] (I don't know which one it was closer to right now). Note that some of the old names have been kept until all code relying on them is updated, but they are now simple wrappers around the closest matching standard abstract operation. - Simplifications of the storage layer: functions that write values to storage are now prefixed with 'storage_' to make their purpose clear, and as they are not part of the spec they should not contain any steps specified by it. Much functionality is now covered by the layers above it and was removed (e.g. handling of accessors, attribute checks). - PropertyAttributes has been greatly simplified, and is being replaced by PropertyDescriptor - a concept similar to the current implementation, but more aligned with the actual spec. See the commit message of the previous commit where it was introduced for details. - As a bonus, and since I had to look at the spec a whole lot anyway, I introduced more inline comments with the exact steps from the spec - this makes it super easy to verify correctness. - East-const all the things. As a result of all of this, things are much more correct but a bit slower now. Retaining speed wasn't a consideration at all, I have done no profiling of the new code - there might be low hanging fruits, which we can then harvest separately. Special thanks to Idan for helping me with this by tracking down bugs, updating everything outside of LibJS to work with these changes (LibWeb, Spreadsheet, HackStudio), as well as providing countless patches to fix regressions I introduced - there still are very few (we got it down to 5), but we also get many new passing test262 tests in return. :^) Co-authored-by: Idan Horowitz <idan.horowitz@gmail.com>
2021-07-04 18:14:16 +01:00
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
TRY(require_object_coercible(vm, base_value));
LibJS: Bring Reference records a bit closer to the ECMAScript spec Our Reference class now has the same fields as the spec: - Base (a non-nullish value, an environment record, or `unresolvable`) - Referenced Name (the name of the binding) - Strict (whether the reference originated in strict mode code) - ThisValue (if non-empty, the reference represents a `super` keyword) The main difference from before is that we now resolve the environment record that a reference interacts with. Previously we simply resolved to either "local variable" or "global variable". The associated abstract operations are still largely non-conforming, since we don't yet implement proper variable bindings. But this patch should at least fix a handful of test262 cases. :^) There's one minor regression: some TypeError message strings get a little worse due to doing a RequireObjectCoercible earlier in the evaluation of MemberExpression.
2021-06-25 16:27:59 +02:00
LibJS: Use ToPropertyKey AO for computed member expression value This ensures the value goes through the regular ToPrimitive mechanism, which PropertyKey::from_value() bypasses. This is relevant for objects with a @@toPrimitive method, for example. Also enables one skipped test in delete-basic.js, which now passes.
2022-12-10 01:08:34 +00:00
property_key = TRY(value.to_property_key(vm));
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
} else if (is<PrivateIdentifier>(*m_property)) {
auto& private_identifier = static_cast<PrivateIdentifier const&>(*m_property);
return make_private_reference(interpreter.vm(), base_value, private_identifier.string());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
} else {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
property_key = verify_cast<Identifier>(*m_property).string();
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
TRY(require_object_coercible(vm, base_value));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
if (!property_key.is_valid())
LibJS: Bring Reference records a bit closer to the ECMAScript spec Our Reference class now has the same fields as the spec: - Base (a non-nullish value, an environment record, or `unresolvable`) - Referenced Name (the name of the binding) - Strict (whether the reference originated in strict mode code) - ThisValue (if non-empty, the reference represents a `super` keyword) The main difference from before is that we now resolve the environment record that a reference interacts with. Previously we simply resolved to either "local variable" or "global variable". The associated abstract operations are still largely non-conforming, since we don't yet implement proper variable bindings. But this patch should at least fix a handful of test262 cases. :^) There's one minor regression: some TypeError message strings get a little worse due to doing a RequireObjectCoercible earlier in the evaluation of MemberExpression.
2021-06-25 16:27:59 +02:00
return Reference {};
LibJS: Rewrite most of Object for spec compliance :^) This is a huge patch, I know. In hindsight this perhaps could've been done slightly more incremental, but I started and then fixed everything until it worked, and here we are. I tried splitting of some completely unrelated changes into separate commits, however. Anyway. This is a rewrite of most of Object, and by extension large parts of Array, Proxy, Reflect, String, TypedArray, and some other things. What we already had worked fine for about 90% of things, but getting the last 10% right proved to be increasingly difficult with the current code that sort of grew organically and is only very loosely based on the spec - this became especially obvious when we started fixing a large number of test262 failures. Key changes include: - 1:1 matching function names and parameters of all object-related functions, to avoid ambiguity. Previously we had things like put(), which the spec doesn't have - as a result it wasn't always clear which need to be used. - Better separation between object abstract operations and internal methods - the former are always the same, the latter can be overridden (and are therefore virtual). The internal methods (i.e. [[Foo]] in the spec) are now prefixed with 'internal_' for clarity - again, it was previously not always clear which AO a certain method represents, get() could've been both Get and [[Get]] (I don't know which one it was closer to right now). Note that some of the old names have been kept until all code relying on them is updated, but they are now simple wrappers around the closest matching standard abstract operation. - Simplifications of the storage layer: functions that write values to storage are now prefixed with 'storage_' to make their purpose clear, and as they are not part of the spec they should not contain any steps specified by it. Much functionality is now covered by the layers above it and was removed (e.g. handling of accessors, attribute checks). - PropertyAttributes has been greatly simplified, and is being replaced by PropertyDescriptor - a concept similar to the current implementation, but more aligned with the actual spec. See the commit message of the previous commit where it was introduced for details. - As a bonus, and since I had to look at the spec a whole lot anyway, I introduced more inline comments with the exact steps from the spec - this makes it super easy to verify correctness. - East-const all the things. As a result of all of this, things are much more correct but a bit slower now. Retaining speed wasn't a consideration at all, I have done no profiling of the new code - there might be low hanging fruits, which we can then harvest separately. Special thanks to Idan for helping me with this by tracking down bugs, updating everything outside of LibJS to work with these changes (LibWeb, Spreadsheet, HackStudio), as well as providing countless patches to fix regressions I introduced - there still are very few (we got it down to 5), but we also get many new passing test262 tests in return. :^) Co-authored-by: Idan Horowitz <idan.horowitz@gmail.com>
2021-07-04 18:14:16 +01:00
auto strict = interpreter.vm().in_strict_mode();
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
return Reference { base_value, move(property_key), {}, strict };
LibJS: Add Reference class to represent a base.property reference Expression nodes can now be asked to produce a Reference. We then use this to implement the "delete" operator without downcasting the child node to a MemberExpression manually.
2020-04-27 12:10:16 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.5.1.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-delete-operator-runtime-semantics-evaluation
// 13.5.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-void-operator-runtime-semantics-evaluation
// 13.5.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-typeof-operator-runtime-semantics-evaluation
// 13.5.4.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-unary-plus-operator-runtime-semantics-evaluation
// 13.5.5.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-unary-minus-operator-runtime-semantics-evaluation
// 13.5.6.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-bitwise-not-operator-runtime-semantics-evaluation
// 13.5.7.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-logical-not-operator-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion UnaryExpression::execute(Interpreter& interpreter) const
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Make native function/property callbacks take VM, not Interpreter More work on decoupling the general runtime from Interpreter. The goal is becoming clearer. Interpreter should be one possible way to execute code inside a VM. In the future we might have other ways :^)
2020-09-27 18:36:49 +02:00
auto& vm = interpreter.vm();
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
LibJS: Implement basic support for the "delete" operator It turns out "delete" is actually a unary op :) This patch implements deletion of object properties, it doesn't yet work for casually deleting properties from the global object. When deleting a property from an object, we switch that object to having a unique shape, no longer sharing shapes with others. Once an object has a unique shape, it no longer needs to care about shape transitions.
2020-04-26 13:53:40 +02:00
if (m_op == UnaryOp::Delete) {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(m_lhs->to_reference(interpreter));
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return Value(TRY(reference.delete_(vm)));
LibJS: Implement basic support for the "delete" operator It turns out "delete" is actually a unary op :) This patch implements deletion of object properties, it doesn't yet work for casually deleting properties from the global object. When deleting a property from an object, we switch that object to having a unique shape, no longer sharing shapes with others. Once an object has a unique shape, it no longer needs to care about shape transitions.
2020-04-26 13:53:40 +02:00
}
LibJS: Make typeof return undefined for undefined variables This makes `typeof i_dont_exist` return `undefined` instead of throwing an error.
2020-06-02 23:26:39 +02:00
Value lhs_result;
LibJS: Remove hand-rolled type information in JS AST in favor of RTTI
2021-01-01 19:34:07 +01:00
if (m_op == UnaryOp::Typeof && is<Identifier>(*m_lhs)) {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(m_lhs->to_reference(interpreter));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert the GetValue AO to ThrowCompletionOr
2021-11-02 18:49:08 +02:00
if (reference.is_unresolvable())
LibJS: Bring Reference records a bit closer to the ECMAScript spec Our Reference class now has the same fields as the spec: - Base (a non-nullish value, an environment record, or `unresolvable`) - Referenced Name (the name of the binding) - Strict (whether the reference originated in strict mode code) - ThisValue (if non-empty, the reference represents a `super` keyword) The main difference from before is that we now resolve the environment record that a reference interacts with. Previously we simply resolved to either "local variable" or "global variable". The associated abstract operations are still largely non-conforming, since we don't yet implement proper variable bindings. But this patch should at least fix a handful of test262 cases. :^) There's one minor regression: some TypeError message strings get a little worse due to doing a RequireObjectCoercible earlier in the evaluation of MemberExpression.
2021-06-25 16:27:59 +02:00
lhs_result = js_undefined();
LibJS: Convert the GetValue AO to ThrowCompletionOr
2021-11-02 18:49:08 +02:00
else
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
lhs_result = TRY(reference.get_value(vm));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(!lhs_result.is_empty());
LibJS: Make typeof return undefined for undefined variables This makes `typeof i_dont_exist` return `undefined` instead of throwing an error.
2020-06-02 23:26:39 +02:00
} else {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let expr be the result of evaluating UnaryExpression.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
lhs_result = TRY(m_lhs->execute(interpreter)).release_value();
LibJS: Make typeof return undefined for undefined variables This makes `typeof i_dont_exist` return `undefined` instead of throwing an error.
2020-06-02 23:26:39 +02:00
}
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
switch (m_op) {
LibJS: Rename BitNot -> BitwiseNot to match other bitwise operators
2020-03-14 20:43:35 +02:00
case UnaryOp::BitwiseNot:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(bitwise_not(vm, lhs_result));
LibJS: Move logical not operator to new unary expression class
2020-03-09 19:04:44 +02:00
case UnaryOp::Not:
LibJS: Use Value::to_boolean() wherever we haven't checked is_boolean() Unless we've verified that a Value is a boolean, we should not be calling as_bool() on it.
2020-03-10 11:08:37 +01:00
return Value(!lhs_result.to_boolean());
LibJS: Implement unary plus / minus
2020-04-02 17:58:39 +01:00
case UnaryOp::Plus:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(unary_plus(vm, lhs_result));
LibJS: Implement unary plus / minus
2020-04-02 17:58:39 +01:00
case UnaryOp::Minus:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
return TRY(unary_minus(vm, lhs_result));
LibJS: Implement typeof operator
2020-03-18 06:33:32 +11:00
case UnaryOp::Typeof:
LibJS+LibWeb: Convert string view PrimitiveString instances to String First, this adds an overload of PrimitiveString::create for StringView. This overload will throw an OOM completion if creating a String fails. This is not only a bit more convenient, but it also ensures at compile time that all PrimitiveString::create(string_view) invocations will be handled as String and OOM-aware. Next, this wraps all invocations to PrimitiveString::create(string_view) with MUST_OR_THROW_OOM. A small PrimitiveString::create(DeprecatedFlyString) overload also had to be added to disambiguate between the StringView and DeprecatedString overloads.
2023-02-09 09:00:14 -05:00
return Value { MUST_OR_THROW_OOM(PrimitiveString::create(vm, lhs_result.typeof())) };
LibJS: Implement void operator
2020-04-15 17:55:03 +01:00
case UnaryOp::Void:
return js_undefined();
LibJS: Implement basic support for the "delete" operator It turns out "delete" is actually a unary op :) This patch implements deletion of object properties, it doesn't yet work for casually deleting properties from the global object. When deleting a property from an object, we switch that object to having a unique shape, no longer sharing shapes with others. Once an object has a unique shape, it no longer needs to care about shape transitions.
2020-04-26 13:53:40 +02:00
case UnaryOp::Delete:
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
}
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SuperExpression::execute(Interpreter&) const
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
{
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
// The semantics for SuperExpression are handled in CallExpression and SuperCall.
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ClassElement::execute(Interpreter&) const
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
{
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
// Note: The semantics of class element are handled in class_element_evaluation
VERIFY_NOT_REACHED();
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
}
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
static ThrowCompletionOr<ClassElementName> class_key_to_property_name(VM& vm, Expression const& key)
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
{
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
if (is<PrivateIdentifier>(key)) {
auto& private_identifier = static_cast<PrivateIdentifier const&>(key);
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto private_environment = vm.running_execution_context().private_environment;
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
VERIFY(private_environment);
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
return ClassElementName { private_environment->resolve_private_identifier(private_identifier.string()) };
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
}
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto prop_key = TRY(vm.execute_ast_node(key));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (prop_key.is_object())
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
prop_key = TRY(prop_key.to_primitive(vm, Value::PreferredType::String));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto property_key = TRY(PropertyKey::from_value(vm, prop_key));
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
return ClassElementName { property_key };
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
// 15.4.5 Runtime Semantics: MethodDefinitionEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-methoddefinitionevaluation
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
ThrowCompletionOr<ClassElement::ClassValue> ClassMethod::class_element_evaluation(VM& vm, Object& target) const
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
{
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto property_key_or_private_name = TRY(class_key_to_property_name(vm, *m_key));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto method_value = TRY(vm.execute_ast_node(*m_function));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Keep handles on internal function while creating a class It seems the stack search does not find all functions because they are kept in variants and other structs. This meant some function could be cleaned up while we were evaluating a class meaning it would fail/crash when attempting to run the functions.
2022-02-04 16:22:29 +01:00
auto function_handle = make_handle(&method_value.as_function());
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
auto& method_function = static_cast<ECMAScriptFunctionObject&>(method_value.as_function());
LibJS: Implement and use the MakeMethod AO Two direct uses of the set_home_object() setter remain, we should fix those up and remove it eventually.
2021-12-29 10:33:46 +01:00
method_function.make_method(target);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
auto set_function_name = [&](DeprecatedString prefix = "") {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
auto name = property_key_or_private_name.visit(
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
[&](PropertyKey const& property_key) -> DeprecatedString {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
if (property_key.is_symbol()) {
auto description = property_key.as_symbol()->description();
LibJS: Unify Symbol::description() and raw_description() Let callers take care of handling the empty optional case (undefined in the spec).
2023-02-11 16:02:14 +00:00
if (!description.has_value() || description->is_empty())
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
return "";
LibJS: Unify Symbol::description() and raw_description() Let callers take care of handling the empty optional case (undefined in the spec).
2023-02-11 16:02:14 +00:00
return DeprecatedString::formatted("[{}]", *description);
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
} else {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
return property_key.to_string();
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
}
},
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
[&](PrivateName const& private_name) -> DeprecatedString {
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
return private_name.description;
});
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
update_function_name(method_value, DeprecatedString::formatted("{}{}{}", prefix, prefix.is_empty() ? "" : " ", name));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
};
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
if (property_key_or_private_name.has<PropertyKey>()) {
auto& property_key = property_key_or_private_name.get<PropertyKey>();
LibJS: Add parsing and evaluation of private fields and methods
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switch (kind()) {
case ClassMethod::Kind::Method:
set_function_name();
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
TRY(target.define_property_or_throw(property_key, { .value = method_value, .writable = true, .enumerable = false, .configurable = true }));
LibJS: Add parsing and evaluation of private fields and methods
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break;
case ClassMethod::Kind::Getter:
set_function_name("get");
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
TRY(target.define_property_or_throw(property_key, { .get = &method_function, .enumerable = true, .configurable = true }));
LibJS: Add parsing and evaluation of private fields and methods
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break;
case ClassMethod::Kind::Setter:
set_function_name("set");
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
TRY(target.define_property_or_throw(property_key, { .set = &method_function, .enumerable = true, .configurable = true }));
LibJS: Add parsing and evaluation of private fields and methods
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break;
default:
VERIFY_NOT_REACHED();
}
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Add parsing and evaluation of private fields and methods
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return ClassValue { normal_completion({}) };
} else {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
auto& private_name = property_key_or_private_name.get<PrivateName>();
LibJS: Add parsing and evaluation of private fields and methods
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switch (kind()) {
case Kind::Method:
set_function_name();
LibJS: Store PrivateElement values in Handle<Value> This fixes an issue where private element values were not always protected from GC. I found two instances where this was happening: - ECMAScriptFunctionObject did not mark m_private_methods - ClassDefinitionEvaluation had two Vector<PrivateElement> that were opaque to the garbage collector, and so if GC occurred while constructing a class instance, some or all of its private elements could get incorrectly collected.
2023-06-02 08:17:28 +02:00
return ClassValue { PrivateElement { private_name, PrivateElement::Kind::Method, make_handle(method_value) } };
LibJS: Add parsing and evaluation of private fields and methods
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case Kind::Getter:
set_function_name("get");
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
return ClassValue { PrivateElement { private_name, PrivateElement::Kind::Accessor, make_handle(Value(Accessor::create(vm, &method_function, nullptr))) } };
LibJS: Add parsing and evaluation of private fields and methods
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case Kind::Setter:
set_function_name("set");
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
return ClassValue { PrivateElement { private_name, PrivateElement::Kind::Accessor, make_handle(Value(Accessor::create(vm, nullptr, &method_function))) } };
LibJS: Add parsing and evaluation of private fields and methods
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default:
VERIFY_NOT_REACHED();
}
}
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
LibJS/Bytecode: Support class field initializers Fixes 513 test262 tests. :^)
2023-06-17 10:11:23 +02:00
Completion ClassFieldInitializerStatement::execute(Interpreter& interpreter) const
{
// 1. Assert: argumentsList is empty.
VERIFY(interpreter.vm().argument_count() == 0);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS/Bytecode: Support class field initializers Fixes 513 test262 tests. :^)
2023-06-17 10:11:23 +02:00
// 2. Assert: functionObject.[[ClassFieldInitializerName]] is not empty.
VERIFY(!m_class_field_identifier_name.is_empty());
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS/Bytecode: Support class field initializers Fixes 513 test262 tests. :^)
2023-06-17 10:11:23 +02:00
// 3. If IsAnonymousFunctionDefinition(AssignmentExpression) is true, then
// a. Let value be ? NamedEvaluation of Initializer with argument functionObject.[[ClassFieldInitializerName]].
// 4. Else,
// a. Let rhs be the result of evaluating AssignmentExpression.
// b. Let value be ? GetValue(rhs).
auto value = TRY(interpreter.vm().named_evaluation_if_anonymous_function(m_expression, m_class_field_identifier_name));
LibJS: Use ClassFieldInitializerStatement for class fields This is necessary as we might have to perform named evaluation with the field name. Ideally we would also skip some setup parts of the function like function_declaration_instantiation however this would require bigger changes to ECMAScriptFunctionObject.
2021-10-13 19:59:38 +02:00
LibJS/Bytecode: Support class field initializers Fixes 513 test262 tests. :^)
2023-06-17 10:11:23 +02:00
// 5. Return Completion Record { [[Type]]: return, [[Value]]: value, [[Target]]: empty }.
return { Completion::Type::Return, value, {} };
}
LibJS: Use ClassFieldInitializerStatement for class fields This is necessary as we might have to perform named evaluation with the field name. Ideally we would also skip some setup parts of the function like function_declaration_instantiation however this would require bigger changes to ECMAScriptFunctionObject.
2021-10-13 19:59:38 +02:00
LibJS/Bytecode: Support class field initializers Fixes 513 test262 tests. :^)
2023-06-17 10:11:23 +02:00
void ClassFieldInitializerStatement::dump(int) const
{
// This should not be dumped as it is never part of an actual AST.
VERIFY_NOT_REACHED();
}
LibJS: Use ClassFieldInitializerStatement for class fields This is necessary as we might have to perform named evaluation with the field name. Ideally we would also skip some setup parts of the function like function_declaration_instantiation however this would require bigger changes to ECMAScriptFunctionObject.
2021-10-13 19:59:38 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
// 15.7.10 Runtime Semantics: ClassFieldDefinitionEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-classfielddefinitionevaluation
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
ThrowCompletionOr<ClassElement::ClassValue> ClassField::class_element_evaluation(VM& vm, Object& target) const
LibJS: Make class definition evaluation more spec like in ordering
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{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto property_key_or_private_name = TRY(class_key_to_property_name(vm, *m_key));
LibJS: Keep handles on internal function while creating a class It seems the stack search does not find all functions because they are kept in variants and other structs. This meant some function could be cleaned up while we were evaluating a class meaning it would fail/crash when attempting to run the functions.
2022-02-04 16:22:29 +01:00
Handle<ECMAScriptFunctionObject> initializer {};
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (m_initializer) {
auto copy_initializer = m_initializer;
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
auto name = property_key_or_private_name.visit(
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
[&](PropertyKey const& property_key) -> DeprecatedString {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
return property_key.is_number() ? property_key.to_string() : property_key.to_string_or_symbol().to_display_string();
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
},
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
[&](PrivateName const& private_name) -> DeprecatedString {
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
return private_name.description;
});
LibJS: Use ClassFieldInitializerStatement for class fields This is necessary as we might have to perform named evaluation with the field name. Ideally we would also skip some setup parts of the function like function_declaration_instantiation however this would require bigger changes to ECMAScriptFunctionObject.
2021-10-13 19:59:38 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
// FIXME: A potential optimization is not creating the functions here since these are never directly accessible.
LibJS: Use ClassFieldInitializerStatement for class fields This is necessary as we might have to perform named evaluation with the field name. Ideally we would also skip some setup parts of the function like function_declaration_instantiation however this would require bigger changes to ECMAScriptFunctionObject.
2021-10-13 19:59:38 +02:00
auto function_code = create_ast_node<ClassFieldInitializerStatement>(m_initializer->source_range(), copy_initializer.release_nonnull(), name);
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
initializer = make_handle(*ECMAScriptFunctionObject::create(realm, DeprecatedString::empty(), DeprecatedString::empty(), *function_code, {}, 0, vm.lexical_environment(), vm.running_execution_context().private_environment, FunctionKind::Normal, true, false, m_contains_direct_call_to_eval, false, property_key_or_private_name));
LibJS: Implement and use the MakeMethod AO Two direct uses of the set_home_object() setter remain, we should fix those up and remove it eventually.
2021-12-29 10:33:46 +01:00
initializer->make_method(target);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
return ClassValue {
ClassFieldDefinition {
Everywhere: Rename JS::PropertyKey variables from property_{name => key} PropertyKey used to be called PropertyName, but got renamed. Let's update all the variables of this type as well.
2022-02-06 15:59:04 +00:00
move(property_key_or_private_name),
LibJS: Keep handles on internal function while creating a class It seems the stack search does not find all functions because they are kept in variants and other structs. This meant some function could be cleaned up while we were evaluating a class meaning it would fail/crash when attempting to run the functions.
2022-02-04 16:22:29 +01:00
move(initializer),
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
};
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
static Optional<DeprecatedFlyString> nullopt_or_private_identifier_description(Expression const& expression)
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
{
if (is<PrivateIdentifier>(expression))
return static_cast<PrivateIdentifier const&>(expression).string();
return {};
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Optional<DeprecatedFlyString> ClassField::private_bound_identifier() const
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
{
return nullopt_or_private_identifier_description(*m_key);
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
Optional<DeprecatedFlyString> ClassMethod::private_bound_identifier() const
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
{
return nullopt_or_private_identifier_description(*m_key);
}
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
// 15.7.11 Runtime Semantics: ClassStaticBlockDefinitionEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-classstaticblockdefinitionevaluation
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
ThrowCompletionOr<ClassElement::ClassValue> StaticInitializer::class_element_evaluation(VM& vm, Object& home_object) const
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let lex be the running execution context's LexicalEnvironment.
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto lexical_environment = vm.running_execution_context().lexical_environment;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Rename scope to environment This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/3246553
2022-05-01 01:10:05 +02:00
// 2. Let privateEnv be the running execution context's PrivateEnvironment.
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto private_environment = vm.running_execution_context().private_environment;
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Let sourceText be the empty sequence of Unicode code points.
// 4. Let formalParameters be an instance of the production FormalParameters : [empty] .
LibJS: Rename scope to environment This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/3246553
2022-05-01 01:10:05 +02:00
// 5. Let bodyFunction be OrdinaryFunctionCreate(%Function.prototype%, sourceText, formalParameters, ClassStaticBlockBody, non-lexical-this, lex, privateEnv).
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
// Note: The function bodyFunction is never directly accessible to ECMAScript code.
LibJS: Convert ECMAScriptFunctionObject::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto body_function = ECMAScriptFunctionObject::create(realm, DeprecatedString::empty(), DeprecatedString::empty(), *m_function_body, {}, 0, lexical_environment, private_environment, FunctionKind::Normal, true, false, m_contains_direct_call_to_eval, false);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 6. Perform MakeMethod(bodyFunction, homeObject).
LibJS: Implement and use the MakeMethod AO Two direct uses of the set_home_object() setter remain, we should fix those up and remove it eventually.
2021-12-29 10:33:46 +01:00
body_function->make_method(home_object);
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 7. Return the ClassStaticBlockDefinition Record { [[BodyFunction]]: bodyFunction }.
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
return ClassValue { normal_completion(body_function) };
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 15.7.16 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-class-definitions-runtime-semantics-evaluation
// ClassExpression : class BindingIdentifier ClassTail
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ClassExpression::execute(Interpreter& interpreter) const
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let className be StringValue of BindingIdentifier.
// 2. Let value be ? ClassDefinitionEvaluation of ClassTail with arguments className and className.
LibJS: Use Identifier to represent name of ClassExpression By using Identifier class to represent the name of a class expression, it becomes possible to consistently store information within the identifier object, indicating whether the name refers to a local variable or not.
2023-06-30 16:51:39 +03:00
auto* value = TRY(class_definition_evaluation(interpreter.vm(), name(), name()));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Set value.[[SourceText]] to the source text matched by ClassExpression.
LibJS: Pass source text to ECMAScriptFunctionObject::create()
2022-01-18 23:47:11 +00:00
value->set_source_text(m_source_text);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. Return value.
LibJS: Let class_definition_evaluation() return a ESFnObject*, not Value No need to hide this very specific Object type in a generic Value.
2022-01-19 19:50:38 +00:00
return Value { value };
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
// 15.7.15 Runtime Semantics: BindingClassDeclarationEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-bindingclassdeclarationevaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
static ThrowCompletionOr<Value> binding_class_declaration_evaluation(Interpreter& interpreter, ClassExpression const& class_expression)
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
{
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto& vm = interpreter.vm();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
// ClassDeclaration : class ClassTail
if (!class_expression.has_name()) {
// 1. Let value be ? ClassDefinitionEvaluation of ClassTail with arguments undefined and "default".
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto value = TRY(class_expression.class_definition_evaluation(vm, {}, "default"));
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
// 2. Set value.[[SourceText]] to the source text matched by ClassDeclaration.
value->set_source_text(class_expression.source_text());
// 3. Return value.
return value;
}
// ClassDeclaration : class BindingIdentifier ClassTail
// 1. Let className be StringValue of BindingIdentifier.
auto class_name = class_expression.name();
VERIFY(!class_name.is_empty());
// 2. Let value be ? ClassDefinitionEvaluation of ClassTail with arguments className and className.
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto value = TRY(class_expression.class_definition_evaluation(vm, class_name, class_name));
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
// 3. Set value.[[SourceText]] to the source text matched by ClassDeclaration.
value->set_source_text(class_expression.source_text());
// 4. Let env be the running execution context's LexicalEnvironment.
auto* env = interpreter.lexical_environment();
// 5. Perform ? InitializeBoundName(className, value, env).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
TRY(initialize_bound_name(vm, class_name, value, env));
LibJS: Move binding_class_declaration_evaluation out of ClassDeclaration
2022-01-18 18:53:11 +01:00
// 6. Return value.
return value;
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 15.7.16 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-class-definitions-runtime-semantics-evaluation
// ClassDeclaration : class BindingIdentifier ClassTail
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ClassDeclaration::execute(Interpreter& interpreter) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Perform ? BindingClassDeclarationEvaluation of this ClassDeclaration.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
(void)TRY(binding_class_declaration_evaluation(interpreter, m_class_expression));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return empty.
return Optional<Value> {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Stop using execute_ast_node in NewClass instruction This change replaces usage of `execute_ast_node` to evaluate super expression in NewClass by generating instructions instead.
2023-06-28 18:22:27 +03:00
ThrowCompletionOr<ECMAScriptFunctionObject*> ClassExpression::create_class_constructor(VM& vm, Environment* class_environment, Environment* environment, Value super_class, DeprecatedFlyString const& binding_name, DeprecatedFlyString const& class_name) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
// We might not set the lexical environment but we always want to restore it eventually.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
ArmedScopeGuard restore_environment = [&] {
vm.running_execution_context().lexical_environment = environment;
};
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto outer_private_environment = vm.running_execution_context().private_environment;
LibJS: Convert new_private_environment() to NonnullGCPtr
2022-12-15 20:04:26 +00:00
auto class_private_environment = new_private_environment(vm, outer_private_environment);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Stop using execute_ast_node in NewClass instruction This change replaces usage of `execute_ast_node` to evaluate super expression in NewClass by generating instructions instead.
2023-06-28 18:22:27 +03:00
auto proto_parent = GCPtr { realm.intrinsics().object_prototype() };
auto constructor_parent = realm.intrinsics().function_prototype();
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
for (auto const& element : m_elements) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto opt_private_name = element->private_bound_identifier();
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
if (opt_private_name.has_value())
class_private_environment->add_private_name({}, opt_private_name.release_value());
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (!m_super_class.is_null()) {
if (super_class.is_null()) {
proto_parent = nullptr;
} else if (!super_class.is_constructor()) {
LbJS: Convert exception-related usages of Value::TDSWOSE to String TDSWOSE being to_deprecated_string_without_side_effects.
2023-02-12 21:26:14 -05:00
return vm.throw_completion<TypeError>(ErrorType::ClassExtendsValueNotAConstructorOrNull, TRY_OR_THROW_OOM(vm, super_class.to_string_without_side_effects()));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
} else {
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto super_class_prototype = TRY(super_class.get(vm, vm.names.prototype));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (!super_class_prototype.is_null() && !super_class_prototype.is_object())
LbJS: Convert exception-related usages of Value::TDSWOSE to String TDSWOSE being to_deprecated_string_without_side_effects.
2023-02-12 21:26:14 -05:00
return vm.throw_completion<TypeError>(ErrorType::ClassExtendsValueInvalidPrototype, TRY_OR_THROW_OOM(vm, super_class_prototype.to_string_without_side_effects()));
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (super_class_prototype.is_null())
proto_parent = nullptr;
else
LibJS: Make intrinsics getters return NonnullGCPtr Some of these are allocated upon initialization of the intrinsics, and some lazily, but in neither case the getters actually return a nullptr. This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has an `operator T&()`), and also has the interesting side effect of forcing us to explicitly use the FunctionObject& overload of call(), as passing a NonnullGCPtr is ambigous - it could implicitly be turned into a Value _or_ a FunctionObject& (so we have to dereference manually).
2023-04-13 00:47:15 +02:00
proto_parent = super_class_prototype.as_object();
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Make intrinsics getters return NonnullGCPtr Some of these are allocated upon initialization of the intrinsics, and some lazily, but in neither case the getters actually return a nullptr. This saves us a whole bunch of pointer dereferences (as NonnullGCPtr has an `operator T&()`), and also has the interesting side effect of forcing us to explicitly use the FunctionObject& overload of call(), as passing a NonnullGCPtr is ambigous - it could implicitly be turned into a Value _or_ a FunctionObject& (so we have to dereference manually).
2023-04-13 00:47:15 +02:00
constructor_parent = super_class.as_object();
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
}
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Convert Object::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto prototype = Object::create(realm, proto_parent);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
VERIFY(prototype);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Rename scope to environment This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/3246553
2022-05-01 01:10:05 +02:00
vm.running_execution_context().lexical_environment = class_environment;
LibJS: Add PrivateEnvironment
2021-10-11 20:29:31 +02:00
vm.running_execution_context().private_environment = class_private_environment;
ScopeGuard restore_private_environment = [&] {
vm.running_execution_context().private_environment = outer_private_environment;
};
LibJS: Add missing to_property_key exception check in ClassExpression
2021-06-17 01:32:08 +03:00
LibJS: Use a synthetic constructor if class with parent doesn't have one We already did this but it called the @@iterator method of %Array.prototype% visible to the user for example by overriding that method. This should not be visible so we use a special version of SuperCall now.
2022-08-20 17:27:02 +02:00
// FIXME: Step 14.a is done in the parser. By using a synthetic super(...args) which does not call @@iterator of %Array.prototype%
LibJS: Stop using execute_ast_node in NewClass instruction This change replaces usage of `execute_ast_node` to evaluate super expression in NewClass by generating instructions instead.
2023-06-28 18:22:27 +03:00
auto const& constructor = *m_constructor;
auto class_constructor = ECMAScriptFunctionObject::create(
realm,
constructor.name(),
constructor.source_text(),
constructor.body(),
constructor.parameters(),
constructor.function_length(),
vm.lexical_environment(),
vm.running_execution_context().private_environment,
constructor.kind(),
constructor.is_strict_mode(),
constructor.might_need_arguments_object(),
constructor.contains_direct_call_to_eval(),
constructor.is_arrow_function());
class_constructor->set_name(class_name);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
class_constructor->set_home_object(prototype);
class_constructor->set_is_class_constructor();
class_constructor->define_direct_property(vm.names.prototype, prototype, Attribute::Writable);
TRY(class_constructor->internal_set_prototype_of(constructor_parent));
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
if (!m_super_class.is_null())
class_constructor->set_constructor_kind(ECMAScriptFunctionObject::ConstructorKind::Derived);
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
prototype->define_direct_property(vm.names.constructor, class_constructor, Attribute::Writable | Attribute::Configurable);
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
using StaticElement = Variant<ClassFieldDefinition, Handle<ECMAScriptFunctionObject>>;
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
Vector<PrivateElement> static_private_methods;
Vector<PrivateElement> instance_private_methods;
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
Vector<ClassFieldDefinition> instance_fields;
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
Vector<StaticElement> static_elements;
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
for (auto const& element : m_elements) {
// Note: All ClassElementEvaluation start with evaluating the name (or we fake it).
LibJS: Make class definition evaluation work in bytecode mode Instead of assuming that there's an active AST interpreter, this code now takes VM& everywhere and invokes the appropriate interpreter. 92 new passes on test262. :^)
2023-06-25 17:33:17 +02:00
auto element_value = TRY(element->class_element_evaluation(vm, element->is_static() ? *class_constructor : *prototype));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
if (element_value.has<PrivateElement>()) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto& container = element->is_static() ? static_private_methods : instance_private_methods;
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
auto& private_element = element_value.get<PrivateElement>();
auto added_to_existing = false;
// FIXME: We can skip this loop in most cases.
for (auto& existing : container) {
if (existing.key == private_element.key) {
VERIFY(existing.kind == PrivateElement::Kind::Accessor);
VERIFY(private_element.kind == PrivateElement::Kind::Accessor);
LibJS: Store PrivateElement values in Handle<Value> This fixes an issue where private element values were not always protected from GC. I found two instances where this was happening: - ECMAScriptFunctionObject did not mark m_private_methods - ClassDefinitionEvaluation had two Vector<PrivateElement> that were opaque to the garbage collector, and so if GC occurred while constructing a class instance, some or all of its private elements could get incorrectly collected.
2023-06-02 08:17:28 +02:00
auto& accessor = private_element.value.value().as_accessor();
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
if (!accessor.getter())
LibJS: Store PrivateElement values in Handle<Value> This fixes an issue where private element values were not always protected from GC. I found two instances where this was happening: - ECMAScriptFunctionObject did not mark m_private_methods - ClassDefinitionEvaluation had two Vector<PrivateElement> that were opaque to the garbage collector, and so if GC occurred while constructing a class instance, some or all of its private elements could get incorrectly collected.
2023-06-02 08:17:28 +02:00
existing.value.value().as_accessor().set_setter(accessor.setter());
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
else
LibJS: Store PrivateElement values in Handle<Value> This fixes an issue where private element values were not always protected from GC. I found two instances where this was happening: - ECMAScriptFunctionObject did not mark m_private_methods - ClassDefinitionEvaluation had two Vector<PrivateElement> that were opaque to the garbage collector, and so if GC occurred while constructing a class instance, some or all of its private elements could get incorrectly collected.
2023-06-02 08:17:28 +02:00
existing.value.value().as_accessor().set_getter(accessor.getter());
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
added_to_existing = true;
}
}
if (!added_to_existing)
container.append(move(element_value.get<PrivateElement>()));
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
} else if (auto* class_field_definition_ptr = element_value.get_pointer<ClassFieldDefinition>()) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (element->is_static())
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
static_elements.append(move(*class_field_definition_ptr));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
else
instance_fields.append(move(*class_field_definition_ptr));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
} else if (element->class_element_kind() == ClassElement::ElementKind::StaticInitializer) {
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
// We use Completion to hold the ClassStaticBlockDefinition Record.
LibJS: Return Optional<T> from Completion::{value,target}(), not T In the end this is a nicer API than having separate has_{value,target}() and having to check those first, and then making another Optional from the unwrapped value: completion.has_value() ? completion.value() : Optional<Value> {} // ^^^^^^^^^^^^^^^^^^ // Implicit creation of non-empty Optional<Value> This way we need to unwrap the optional ourselves, but can easily pass it to something else as well. This is in anticipation of the AST using completions :^)
2021-12-28 17:42:14 +01:00
VERIFY(element_value.has<Completion>() && element_value.get<Completion>().value().has_value());
auto& element_object = element_value.get<Completion>().value()->as_object();
VERIFY(is<ECMAScriptFunctionObject>(element_object));
LibJS: Keep handles on internal function while creating a class It seems the stack search does not find all functions because they are kept in variants and other structs. This meant some function could be cleaned up while we were evaluating a class meaning it would fail/crash when attempting to run the functions.
2022-02-04 16:22:29 +01:00
static_elements.append(make_handle(static_cast<ECMAScriptFunctionObject*>(&element_object)));
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
}
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
vm.running_execution_context().lexical_environment = environment;
restore_environment.disarm();
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!binding_name.is_null())
LibJS: Add an initialize binding hint to all initialize_binding methods This will allow us to specify things like SyncDispose and perhaps AsyncDispose in the future.
2022-12-14 13:26:10 +01:00
MUST(class_environment->initialize_binding(vm, binding_name, class_constructor, Environment::InitializeBindingHint::Normal));
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
for (auto& field : instance_fields)
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
class_constructor->add_field(field);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
for (auto& private_method : instance_private_methods)
class_constructor->add_private_method(private_method);
for (auto& method : static_private_methods)
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
TRY(class_constructor->private_method_or_accessor_add(move(method)));
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
for (auto& element : static_elements) {
TRY(element.visit(
LibJS: De-duplicate ClassFieldDefinition Records This was defined twice, despite being the very same thing: - ClassElement::ClassFieldDefinition - ECMAScriptFunctionObject::InstanceField Move the former to a new header and use it everywhere. Also update the define_field() AO to take a single field instead of separate name and initializer arguments.
2022-04-20 00:06:45 +02:00
[&](ClassFieldDefinition& field) -> ThrowCompletionOr<void> {
return TRY(class_constructor->define_field(field));
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
},
LibJS: Keep handles on internal function while creating a class It seems the stack search does not find all functions because they are kept in variants and other structs. This meant some function could be cleaned up while we were evaluating a class meaning it would fail/crash when attempting to run the functions.
2022-02-04 16:22:29 +01:00
[&](Handle<ECMAScriptFunctionObject> static_block_function) -> ThrowCompletionOr<void> {
VERIFY(!static_block_function.is_null());
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
// We discard any value returned here.
LibJS: Stop using execute_ast_node in NewClass instruction This change replaces usage of `execute_ast_node` to evaluate super expression in NewClass by generating instructions instead.
2023-06-28 18:22:27 +03:00
TRY(call(vm, *static_block_function.cell(), class_constructor));
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
return {};
}));
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
}
LibJS: Stop using execute_ast_node in NewClass instruction This change replaces usage of `execute_ast_node` to evaluate super expression in NewClass by generating instructions instead.
2023-06-28 18:22:27 +03:00
class_constructor->set_source_text(source_text());
return { class_constructor };
}
// 15.7.14 Runtime Semantics: ClassDefinitionEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-classdefinitionevaluation
ThrowCompletionOr<ECMAScriptFunctionObject*> ClassExpression::class_definition_evaluation(VM& vm, DeprecatedFlyString const& binding_name, DeprecatedFlyString const& class_name) const
{
auto* environment = vm.lexical_environment();
VERIFY(environment);
auto class_environment = new_declarative_environment(*environment);
Value super_class;
if (!binding_name.is_null())
MUST(class_environment->create_immutable_binding(vm, binding_name, true));
if (!m_super_class.is_null()) {
vm.running_execution_context().lexical_environment = class_environment;
// Note: Since our execute does evaluation and GetValue in once we must check for a valid reference first
auto reference = TRY(m_super_class->to_reference(vm.interpreter()));
if (reference.is_valid_reference()) {
super_class = TRY(reference.get_value(vm));
} else {
super_class = TRY(vm.execute_ast_node(*m_super_class));
}
vm.running_execution_context().lexical_environment = environment;
}
return create_class_constructor(vm, class_environment, environment, super_class, binding_name, class_name);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
}
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
void ASTNode::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", class_name());
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
void ScopeNode::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!m_lexical_declarations.is_empty()) {
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
print_indent(indent + 1);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
outln("(Lexical declarations)");
for (auto& declaration : m_lexical_declarations)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
declaration->dump(indent + 2);
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!m_var_declarations.is_empty()) {
print_indent(indent + 1);
outln("(Variable declarations)");
for (auto& declaration : m_var_declarations)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
declaration->dump(indent + 2);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
if (!m_functions_hoistable_with_annexB_extension.is_empty()) {
print_indent(indent + 1);
outln("(Hoisted functions via annexB extension)");
for (auto& declaration : m_functions_hoistable_with_annexB_extension)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
declaration->dump(indent + 2);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
if (!m_children.is_empty()) {
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Children)");
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
for (auto& child : children())
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
child->dump(indent + 2);
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
}
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
void BinaryExpression::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* op_string = nullptr;
LibJS: Include the operator in BinaryExpression dumps
2020-03-07 23:16:34 +01:00
switch (m_op) {
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Addition:
LibJS: Include the operator in BinaryExpression dumps
2020-03-07 23:16:34 +01:00
op_string = "+";
break;
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Subtraction:
LibJS: Include the operator in BinaryExpression dumps
2020-03-07 23:16:34 +01:00
op_string = "-";
break;
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Multiplication:
LibJS: Implement multiplication and division operators
2020-03-12 23:04:52 +11:00
op_string = "*";
break;
LibJS: Rename BinaryOp::{Plus,Minus,Asterisk,Slash}
2020-04-05 12:56:53 +01:00
case BinaryOp::Division:
LibJS: Implement multiplication and division operators
2020-03-12 23:04:52 +11:00
op_string = "/";
break;
LibJS: Add basic support for modulo (%) in binary expressions
2020-04-04 21:17:34 +02:00
case BinaryOp::Modulo:
op_string = "%";
break;
LibJS: Implement exponentiation (** operator)
2020-04-05 13:40:00 +01:00
case BinaryOp::Exponentiation:
op_string = "**";
break;
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::StrictlyEquals:
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
op_string = "===";
break;
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::StrictlyInequals:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "!==";
break;
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::LooselyEquals:
LibJS: Implement abstract equality and inequality
2020-03-16 00:23:38 +02:00
op_string = "==";
break;
LibJS: Rename {Abstract,Typed => Loosely,Strictly}{Equals,Inequals} This affects the AST's BinaryOp enum as well as the Bytecode's ENUMERATE_BYTECODE_OPS and JS_ENUMERATE_COMMON_BINARY_OPS macros.
2021-09-24 00:06:10 +02:00
case BinaryOp::LooselyInequals:
LibJS: Implement abstract equality and inequality
2020-03-16 00:23:38 +02:00
op_string = "!=";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::GreaterThan:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = ">";
break;
LibJS: Implement <= and >= binary operators
2020-03-12 23:07:08 +11:00
case BinaryOp::GreaterThanEquals:
op_string = ">=";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::LessThan:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "<";
break;
LibJS: Implement <= and >= binary operators
2020-03-12 23:07:08 +11:00
case BinaryOp::LessThanEquals:
op_string = "<=";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseAnd:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "&";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseOr:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "|";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::BitwiseXor:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "^";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::LeftShift:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "<<";
break;
LibJS: Move Value ops into Value.cpp and tweak BinaryOp names
2020-03-10 11:35:05 +01:00
case BinaryOp::RightShift:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = ">>";
break;
LibJS: Implement bitwise unsigned right shift operator (>>>)
2020-04-23 15:43:10 +01:00
case BinaryOp::UnsignedRightShift:
op_string = ">>>";
break;
LibJS: Implement 'in' operator
2020-04-23 16:06:01 +01:00
case BinaryOp::In:
op_string = "in";
break;
LibJS: Implement the "instanceof" operator This operator walks the prototype chain of the RHS value and looks for a "prototype" property with the same value as the prototype of the LHS. This is pretty cool. :^)
2020-03-28 16:56:54 +01:00
case BinaryOp::InstanceOf:
op_string = "instanceof";
break;
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
}
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", class_name());
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
m_lhs->dump(indent + 1);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS: Add typed comparison operator The `===` operator allows us to compare two values while taking their type into consideration.
2020-03-08 07:53:02 +02:00
m_rhs->dump(indent + 1);
}
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
void LogicalExpression::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* op_string = nullptr;
LibJS: Implement logical expressions Logical expressions are expressions which can return either true or false according to a provided condition.
2020-03-08 07:55:44 +02:00
switch (m_op) {
case LogicalOp::And:
op_string = "&&";
break;
case LogicalOp::Or:
op_string = "||";
break;
LibJS: Implement nullish coalescing operator (??)
2020-04-18 00:49:11 +01:00
case LogicalOp::NullishCoalescing:
op_string = "??";
break;
LibJS: Include the operator in BinaryExpression dumps
2020-03-07 23:16:34 +01:00
}
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", class_name());
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
m_lhs->dump(indent + 1);
LibJS: Include the operator in BinaryExpression dumps
2020-03-07 23:16:34 +01:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
m_rhs->dump(indent + 1);
}
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
void UnaryExpression::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* op_string = nullptr;
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
switch (m_op) {
LibJS: Rename BitNot -> BitwiseNot to match other bitwise operators
2020-03-14 20:43:35 +02:00
case UnaryOp::BitwiseNot:
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
op_string = "~";
break;
LibJS: Move logical not operator to new unary expression class
2020-03-09 19:04:44 +02:00
case UnaryOp::Not:
op_string = "!";
break;
LibJS: Implement unary plus / minus
2020-04-02 17:58:39 +01:00
case UnaryOp::Plus:
op_string = "+";
break;
case UnaryOp::Minus:
op_string = "-";
break;
LibJS: Implement typeof operator
2020-03-18 06:33:32 +11:00
case UnaryOp::Typeof:
op_string = "typeof ";
break;
LibJS: Implement void operator
2020-04-15 17:55:03 +01:00
case UnaryOp::Void:
op_string = "void ";
break;
LibJS: Implement basic support for the "delete" operator It turns out "delete" is actually a unary op :) This patch implements deletion of object properties, it doesn't yet work for casually deleting properties from the global object. When deleting a property from an object, we switch that object to having a unique shape, no longer sharing shapes with others. Once an object has a unique shape, it no longer needs to care about shape transitions.
2020-04-26 13:53:40 +02:00
case UnaryOp::Delete:
op_string = "delete ";
break;
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
}
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", class_name());
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS: Add new bitwise and relational operators Do note that when it comes to evaluating binary expressions, we are asserting in multiple contexts that the values we're operating on are numbers, we should probably handle other value types to be more tolerant in the future, since for example, adding a number and a string, in which case the number is converted to a string implicitly which is then concatenated, although ugly, is valid javascript.
2020-03-08 23:27:18 +02:00
m_lhs->dump(indent + 1);
}
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
void CallExpression::dump(int indent) const
{
LibJS: Support array holes, encoded as empty JS::Value This patch adds a new kind of JS::Value, the empty value. It's what you get when you do JSValue() (or most commonly, {} in C++.) An empty Value signifies the absence of a value, and should never be visible to JavaScript itself. As of right now, it's used for array holes and as a return value when an exception has been thrown and we just want to unwind. This patch is a bit of a mess as I had to fix a whole bunch of code that was relying on JSValue() being undefined, etc.
2020-04-06 20:24:45 +02:00
print_indent(indent);
LibJS: Remove hand-rolled type information in JS AST in favor of RTTI
2021-01-01 19:34:07 +01:00
if (is<NewExpression>(*this))
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("CallExpression [new]");
else
outln("CallExpression");
LibJS: Add operator precedence parsing Obey precedence and associativity rules when parsing expressions with chained operators.
2020-03-12 23:02:41 +01:00
m_callee->dump(indent + 1);
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
for (auto& argument : arguments())
LibJS: Add function call spreading Adds support for the following syntax: myFunction(...x, ...[1, 2, 3], ...o.foo, ...'abcd')
2020-05-05 22:36:24 -07:00
argument.value->dump(indent + 1);
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Make SuperCall a proper AST node and clean up evaluation
2021-07-02 19:30:38 +02:00
void SuperCall::dump(int indent) const
{
print_indent(indent);
outln("SuperCall");
for (auto& argument : m_arguments)
argument.value->dump(indent + 1);
}
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
void ClassDeclaration::dump(int indent) const
{
ASTNode::dump(indent);
m_class_expression->dump(indent + 1);
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> ClassDeclaration::for_each_bound_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
if (m_class_expression->name().is_empty())
return {};
return callback(m_class_expression->name());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Add for_each_bound_identifier for AST::Declaration The same as for_each_bound_name but for identifiers.
2023-07-02 01:04:07 +03:00
ThrowCompletionOr<void> ClassDeclaration::for_each_bound_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
if (!m_class_expression->m_name)
return {};
return callback(*m_class_expression->m_name);
}
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
void ClassExpression::dump(int indent) const
{
print_indent(indent);
LibJS: Use Identifier to represent name of ClassExpression By using Identifier class to represent the name of a class expression, it becomes possible to consistently store information within the identifier object, indicating whether the name refers to a local variable or not.
2023-06-30 16:51:39 +03:00
outln("ClassExpression: \"{}\"", name());
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Constructor)");
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
m_constructor->dump(indent + 1);
if (!m_super_class.is_null()) {
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Super Class)");
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
m_super_class->dump(indent + 1);
}
print_indent(indent);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
outln("(Elements)");
for (auto& method : m_elements)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
method->dump(indent + 1);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
}
void ClassMethod::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Key)");
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
m_key->dump(indent + 1);
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* kind_string = nullptr;
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
switch (m_kind) {
case Kind::Method:
kind_string = "Method";
break;
case Kind::Getter:
kind_string = "Getter";
break;
case Kind::Setter:
kind_string = "Setter";
break;
}
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("Kind: {}", kind_string);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
print_indent(indent);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
outln("Static: {}", is_static());
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Function)");
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
m_function->dump(indent + 1);
}
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
void ClassField::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("(Key)");
m_key->dump(indent + 1);
print_indent(indent);
LibJS: Make class definition evaluation more spec like in ordering
2021-10-07 01:09:04 +02:00
outln("Static: {}", is_static());
LibJS: Add support for public fields in classes
2021-08-28 17:11:05 +02:00
if (m_initializer) {
print_indent(indent);
outln("(Initializer)");
m_initializer->dump(indent + 1);
}
}
LibJS: Add static initializers to classes
2021-10-20 21:29:47 +02:00
void StaticInitializer::dump(int indent) const
{
ASTNode::dump(indent);
m_function_body->dump(indent + 1);
}
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
void StringLiteral::dump(int indent) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("StringLiteral \"{}\"", m_value);
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
}
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
void SuperExpression::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("super");
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
}
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
void NumericLiteral::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("NumericLiteral {}", m_value);
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
}
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
void BigIntLiteral::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("BigIntLiteral {}", m_value);
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
}
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
void BooleanLiteral::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("BooleanLiteral {}", m_value);
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Implement null and undefined literals
2020-03-15 23:32:34 +02:00
void NullLiteral::dump(int indent) const
{
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("null");
LibJS: Implement null and undefined literals
2020-03-15 23:32:34 +02:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
bool BindingPattern::contains_expression() const
{
for (auto& entry : entries) {
if (entry.initializer)
return true;
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (auto binding_ptr = entry.alias.get_pointer<NonnullRefPtr<BindingPattern const>>(); binding_ptr && (*binding_ptr)->contains_expression())
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return true;
}
return false;
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> BindingPattern::for_each_bound_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
{
for (auto const& entry : entries) {
auto const& alias = entry.alias;
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (alias.has<NonnullRefPtr<Identifier const>>()) {
TRY(callback(alias.get<NonnullRefPtr<Identifier const>>()->string()));
} else if (alias.has<NonnullRefPtr<BindingPattern const>>()) {
TRY(alias.get<NonnullRefPtr<BindingPattern const>>()->for_each_bound_name(forward<decltype(callback)>(callback)));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
} else {
auto const& name = entry.name;
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (name.has<NonnullRefPtr<Identifier const>>())
TRY(callback(name.get<NonnullRefPtr<Identifier const>>()->string()));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}
}
return {};
}
LibJS: Add for_each_bound_identifier for AST::Declaration The same as for_each_bound_name but for identifiers.
2023-07-02 01:04:07 +03:00
ThrowCompletionOr<void> BindingPattern::for_each_bound_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
for (auto const& entry : entries) {
auto const& alias = entry.alias;
if (alias.has<NonnullRefPtr<Identifier const>>()) {
TRY(callback(alias.get<NonnullRefPtr<Identifier const>>()));
} else if (alias.has<NonnullRefPtr<BindingPattern const>>()) {
TRY(alias.get<NonnullRefPtr<BindingPattern const>>()->for_each_bound_identifier(forward<decltype(callback)>(callback)));
} else {
auto const& name = entry.name;
if (name.has<NonnullRefPtr<Identifier const>>())
TRY(callback(name.get<NonnullRefPtr<Identifier const>>()));
}
}
return {};
}
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
void BindingPattern::dump(int indent) const
{
print_indent(indent);
outln("BindingPattern {}", kind == Kind::Array ? "Array" : "Object");
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
for (auto& entry : entries) {
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
print_indent(indent + 1);
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
outln("(Property)");
if (kind == Kind::Object) {
print_indent(indent + 2);
outln("(Identifier)");
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (entry.name.has<NonnullRefPtr<Identifier const>>()) {
entry.name.get<NonnullRefPtr<Identifier const>>()->dump(indent + 3);
LibJS/Bytecode: Support using MemberExpression as rest property Also, don't assert while dumping an AST with this construct. 7 new passes on test262. :^)
2023-07-02 11:24:55 +02:00
} else if (entry.name.has<NonnullRefPtr<Expression const>>()) {
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
entry.name.get<NonnullRefPtr<Expression const>>()->dump(indent + 3);
LibJS/Bytecode: Support using MemberExpression as rest property Also, don't assert while dumping an AST with this construct. 7 new passes on test262. :^)
2023-07-02 11:24:55 +02:00
} else {
VERIFY(entry.name.has<Empty>());
print_indent(indent + 3);
outln("<empty>");
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
}
} else if (entry.is_elision()) {
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
print_indent(indent + 2);
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
outln("(Elision)");
continue;
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
}
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
print_indent(indent + 2);
outln("(Pattern{})", entry.is_rest ? " rest=true" : "");
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
if (entry.alias.has<NonnullRefPtr<Identifier const>>()) {
entry.alias.get<NonnullRefPtr<Identifier const>>()->dump(indent + 3);
} else if (entry.alias.has<NonnullRefPtr<BindingPattern const>>()) {
entry.alias.get<NonnullRefPtr<BindingPattern const>>()->dump(indent + 3);
} else if (entry.alias.has<NonnullRefPtr<MemberExpression const>>()) {
entry.alias.get<NonnullRefPtr<MemberExpression const>>()->dump(indent + 3);
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
} else {
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
print_indent(indent + 3);
outln("<empty>");
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
}
LibJS: Restructure and fully implement BindingPatterns
2021-06-12 18:04:28 -07:00
if (entry.initializer) {
print_indent(indent + 2);
outln("(Initializer)");
entry.initializer->dump(indent + 3);
}
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
}
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
void FunctionNode::dump(int indent, DeprecatedString const& class_name) const
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
{
print_indent(indent);
LibJS: Parse async generator functions
2021-11-15 01:53:24 +01:00
auto is_async = m_kind == FunctionKind::Async || m_kind == FunctionKind::AsyncGenerator;
auto is_generator = m_kind == FunctionKind::Generator || m_kind == FunctionKind::AsyncGenerator;
outln("{}{}{} '{}'", class_name, is_async ? " async" : "", is_generator ? "*" : "", name());
LibJS: Propagate "contains direct call to eval()" flag from parser We now propagate this flag to FunctionDeclaration, and then also into ECMAScriptFunctionObject. This will be used to disable optimizations that aren't safe in the presence of direct eval().
2021-10-08 12:43:38 +02:00
if (m_contains_direct_call_to_eval) {
print_indent(indent + 1);
outln("\033[31;1m(direct eval)\033[0m");
}
LibJS: Add function default arguments Adds the ability for function arguments to have default values. This works for standard functions as well as arrow functions. Default values are not printed in a <function>.toString() call, as nodes cannot print their source string representation.
2020-05-02 11:46:39 -07:00
if (!m_parameters.is_empty()) {
print_indent(indent + 1);
Everywhere: Remove accidental '\n' from various outln() invocations Also convert outln(stderr, ...) to warnln(...)
2021-06-03 22:49:37 +02:00
outln("(Parameters)");
LibJS: Add function default arguments Adds the ability for function arguments to have default values. This works for standard functions as well as arrow functions. Default values are not printed in a <function>.toString() call, as nodes cannot print their source string representation.
2020-05-02 11:46:39 -07:00
for (auto& parameter : m_parameters) {
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
parameter.binding.visit(
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
[&](DeprecatedFlyString const& name) {
LibJS: Fix bad indentation when dumping FunctionNode AST nodes
2023-06-24 06:23:46 +02:00
print_indent(indent + 2);
if (parameter.is_rest)
out("...");
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
outln("{}", name);
},
LibJS: Switch AST.{h,cpp} to east const
2021-06-11 02:13:06 +04:30
[&](BindingPattern const& pattern) {
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
pattern.dump(indent + 2);
});
LibJS: Implement rest parameters
2020-05-04 16:05:13 +01:00
if (parameter.default_value)
LibJS: Add function default arguments Adds the ability for function arguments to have default values. This works for standard functions as well as arrow functions. Default values are not printed in a <function>.toString() call, as nodes cannot print their source string representation.
2020-05-02 11:46:39 -07:00
parameter.default_value->dump(indent + 3);
}
}
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Body)");
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
body().dump(indent + 2);
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Add FunctionExpression AST node Most of the code is shared with FunctionDeclaration, so the shared bits are moved up into a common base called FunctionNode.
2020-03-19 11:12:08 +01:00
void FunctionDeclaration::dump(int indent) const
{
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
FunctionNode::dump(indent, class_name());
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> FunctionDeclaration::for_each_bound_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
if (name().is_empty())
return {};
return callback(name());
LibJS: Add FunctionExpression AST node Most of the code is shared with FunctionDeclaration, so the shared bits are moved up into a common base called FunctionNode.
2020-03-19 11:12:08 +01:00
}
LibJS: Add for_each_bound_identifier for AST::Declaration The same as for_each_bound_name but for identifiers.
2023-07-02 01:04:07 +03:00
ThrowCompletionOr<void> FunctionDeclaration::for_each_bound_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
if (!m_name)
return {};
return callback(*m_name);
}
LibJS: Add FunctionExpression AST node Most of the code is shared with FunctionDeclaration, so the shared bits are moved up into a common base called FunctionNode.
2020-03-19 11:12:08 +01:00
void FunctionExpression::dump(int indent) const
{
FunctionNode::dump(indent, class_name());
}
LibJS: Implement generator functions (only in bytecode mode)
2021-06-11 01:38:30 +04:30
void YieldExpression::dump(int indent) const
{
ASTNode::dump(indent);
if (argument())
argument()->dump(indent + 1);
}
LibJS: Add support for await expressions
2021-11-09 22:52:21 +02:00
void AwaitExpression::dump(int indent) const
{
ASTNode::dump(indent);
m_argument->dump(indent + 1);
}
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
void ReturnStatement::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Add Javascript lexer and parser This adds a basic Javascript lexer and parser. It can parse the currently existing demo programs. More work needs to be done to turn it into a complete parser than can parse arbitrary JS Code. The lexer outputs tokens with preceeding whitespace and comments in the trivia member. This should allow us to generate the exact source code by concatenating the generated tokens. The parser is written in a way that it always returns a complete syntax tree. Error conditions are represented as nodes in the tree. This simplifies the code and allows it to be used as an early stage parser, e.g for parsing JS documents in an IDE while editing the source code.:
2020-03-11 19:27:43 +01:00
if (argument())
argument()->dump(indent + 1);
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
void IfStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("If");
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
predicate().dump(indent + 1);
consequent().dump(indent + 1);
LibJS: Parse "if" statements This patch implements basic parsing of "if" statements. We don't yet support parsing "else", so I added a FIXME about that.
2020-03-21 18:40:17 +01:00
if (alternate()) {
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("Else");
LibJS: Parse "if" statements This patch implements basic parsing of "if" statements. We don't yet support parsing "else", so I added a FIXME about that.
2020-03-21 18:40:17 +01:00
alternate()->dump(indent + 1);
}
LibJS: Implement if statements If statements execute a certain action or an alternative one depending on whether the tested condition is true or false, this commit helps establish basic control flow capabilities in the AST.
2020-03-08 07:58:58 +02:00
}
LibJS: Implement While statements
2020-03-09 03:22:21 +08:00
void WhileStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("While");
LibJS: Rename WhileStatement::predicate() => body() This name matches other parsers.
2020-04-04 21:21:19 +02:00
test().dump(indent + 1);
LibJS: Implement While statements
2020-03-09 03:22:21 +08:00
body().dump(indent + 1);
}
LibJS: Parse "with" statements :^)
2020-11-28 15:05:57 +01:00
void WithStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("Object");
LibJS: Parse "with" statements :^)
2020-11-28 15:05:57 +01:00
object().dump(indent + 2);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("Body");
LibJS: Parse "with" statements :^)
2020-11-28 15:05:57 +01:00
body().dump(indent + 2);
}
LibJS: Add support for do..while statements
2020-04-04 21:29:23 +02:00
void DoWhileStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("DoWhile");
LibJS: Add support for do..while statements
2020-04-04 21:29:23 +02:00
test().dump(indent + 1);
body().dump(indent + 1);
}
LibJS: Implement for statement
2020-03-12 23:12:12 +11:00
void ForStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("For");
LibJS: Implement for statement
2020-03-12 23:12:12 +11:00
if (init())
init()->dump(indent + 1);
if (test())
test()->dump(indent + 1);
if (update())
update()->dump(indent + 1);
body().dump(indent + 1);
}
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
void ForInStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("ForIn");
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
lhs().visit([&](auto& lhs) { lhs->dump(indent + 1); });
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
rhs().dump(indent + 1);
body().dump(indent + 1);
}
void ForOfStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("ForOf");
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
lhs().visit([&](auto& lhs) { lhs->dump(indent + 1); });
LibJS: Implement basic for..in and for..of loops
2020-04-21 19:21:26 +01:00
rhs().dump(indent + 1);
body().dump(indent + 1);
}
LibJS: Implement parsing and executing for-await-of loops
2021-11-23 16:09:28 +01:00
void ForAwaitOfStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("ForAwaitOf");
m_lhs.visit([&](auto& lhs) { lhs->dump(indent + 1); });
m_rhs->dump(indent + 1);
m_body->dump(indent + 1);
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.1.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-identifiers-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion Identifier::execute(Interpreter& interpreter) const
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return ? ResolveBinding(StringValue of Identifier).
LibJS: Make Identifier::execute() actually use the lookup cache If we have cached environment coordinates for an Identifier, we have to call to_reference() to actually make use of them. :^)
2022-11-10 20:59:44 +01:00
// OPTIMIZATION: We call Identifier::to_reference() here, which acts as a caching layer around ResolveBinding.
auto reference = TRY(to_reference(interpreter));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
// NOTE: The spec wants us to return the reference directly; this is not possible with ASTNode::execute() (short of letting it return a variant).
// So, instead of calling GetValue at the call site, we do it here.
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return TRY(reference.get_value(vm));
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
void Identifier::dump(int indent) const
{
print_indent(indent);
LibJS: Update parser to detect if identifier refer a "local" variable This modification enables the parser to determine whether an identifier used within a function refers to a local variable or not. In this context, a local identifier means that it is not captured by any nested function declaration which means it modified only from inside a function. The information about whether identifier is local is stored inside Identifier AST node and also contains information about the index of local variable inside a function and information about total number of local variables used by a function is stored in function nodes.
2023-07-05 00:14:41 +02:00
if (is_local()) {
outln("Identifier \"{}\" is_local=(true) index=({})", m_string, m_local_variable_index);
} else {
outln("Identifier \"{}\"", m_string);
}
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion PrivateIdentifier::execute(Interpreter&) const
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
{
// Note: This should be handled by either the member expression this is part of
// or the binary expression in the case of `#foo in bar`.
VERIFY_NOT_REACHED();
}
void PrivateIdentifier::dump(int indent) const
{
print_indent(indent);
outln("PrivateIdentifier \"{}\"", m_string);
}
LibJS: Add spreading in array literals Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
2020-04-26 23:05:37 -07:00
void SpreadExpression::dump(int indent) const
{
ASTNode::dump(indent);
m_target->dump(indent + 1);
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SpreadExpression::execute(Interpreter& interpreter) const
LibJS: Add spreading in array literals Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
2020-04-26 23:05:37 -07:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_target->execute(interpreter);
LibJS: Add spreading in array literals Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
2020-04-26 23:05:37 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-this-keyword-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ThisExpression::execute(Interpreter& interpreter) const
LibJS: Parse "this" as ThisExpression
2020-04-13 00:42:14 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
auto& vm = interpreter.vm();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return ? ResolveThisBinding().
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.resolve_this_binding();
LibJS: Parse "this" as ThisExpression
2020-04-13 00:42:14 +02:00
}
void ThisExpression::dump(int indent) const
{
ASTNode::dump(indent);
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// 13.15.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-assignment-operators-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion AssignmentExpression::execute(Interpreter& interpreter) const
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (m_op == AssignmentOp::Assignment) {
// AssignmentExpression : LeftHandSideExpression = AssignmentExpression
return m_lhs.visit(
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. If LeftHandSideExpression is neither an ObjectLiteral nor an ArrayLiteral, then
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<Expression const> const& lhs) -> ThrowCompletionOr<Value> {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let lref be the result of evaluating LeftHandSideExpression.
// b. ReturnIfAbrupt(lref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(lhs->to_reference(interpreter));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Value rhs_result;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// c. If IsAnonymousFunctionDefinition(AssignmentExpression) and IsIdentifierRef of LeftHandSideExpression are both true, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (lhs->is_identifier()) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// i. Let rval be ? NamedEvaluation of AssignmentExpression with argument lref.[[ReferencedName]].
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto& identifier_name = static_cast<Identifier const&>(*lhs).string();
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
rhs_result = TRY(vm.named_evaluation_if_anonymous_function(m_rhs, identifier_name));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// d. Else,
else {
// i. Let rref be the result of evaluating AssignmentExpression.
// ii. Let rval be ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// e. Perform ? PutValue(lref, rval).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
TRY(reference.put_value(vm, rhs_result));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// f. Return rval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return rhs_result;
},
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Let assignmentPattern be the AssignmentPattern that is covered by LeftHandSideExpression.
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& pattern) -> ThrowCompletionOr<Value> {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Let rref be the result of evaluating AssignmentExpression.
// 4. Let rval be ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Change "as [the] argument[s]" to "with arguments" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/e671b96
2022-05-01 01:21:22 +02:00
// 5. Perform ? DestructuringAssignmentEvaluation of assignmentPattern with argument rval.
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
TRY(vm.destructuring_assignment_evaluation(pattern, rhs_result));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 6. Return rval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return rhs_result;
});
}
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
VERIFY(m_lhs.has<NonnullRefPtr<Expression const>>());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let lref be the result of evaluating LeftHandSideExpression.
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
auto& lhs_expression = *m_lhs.get<NonnullRefPtr<Expression const>>();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(lhs_expression.to_reference(interpreter));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Let lval be ? GetValue(lref).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto lhs_result = TRY(reference.get_value(vm));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// AssignmentExpression : LeftHandSideExpression {&&=, ||=, ??=} AssignmentExpression
if (m_op == AssignmentOp::AndAssignment || m_op == AssignmentOp::OrAssignment || m_op == AssignmentOp::NullishAssignment) {
switch (m_op) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// AssignmentExpression : LeftHandSideExpression &&= AssignmentExpression
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
case AssignmentOp::AndAssignment:
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let lbool be ToBoolean(lval).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. If lbool is false, return lval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!lhs_result.to_boolean())
return lhs_result;
break;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// AssignmentExpression : LeftHandSideExpression ||= AssignmentExpression
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
case AssignmentOp::OrAssignment:
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Let lbool be ToBoolean(lval).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. If lbool is true, return lval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (lhs_result.to_boolean())
return lhs_result;
break;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// AssignmentExpression : LeftHandSideExpression ??= AssignmentExpression
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
case AssignmentOp::NullishAssignment:
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. If lval is neither undefined nor null, return lval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!lhs_result.is_nullish())
return lhs_result;
break;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
default:
VERIFY_NOT_REACHED();
}
Value rhs_result;
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. If IsAnonymousFunctionDefinition(AssignmentExpression) is true and IsIdentifierRef of LeftHandSideExpression is true, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (lhs_expression.is_identifier()) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Let rval be ? NamedEvaluation of AssignmentExpression with argument lref.[[ReferencedName]].
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto& identifier_name = static_cast<Identifier const&>(lhs_expression).string();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
rhs_result = TRY(interpreter.vm().named_evaluation_if_anonymous_function(m_rhs, identifier_name));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 6. Else,
else {
// a. Let rref be the result of evaluating AssignmentExpression.
// b. Let rval be ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 7. Perform ? PutValue(lref, rval).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
TRY(reference.put_value(vm, rhs_result));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 8. Return rval.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return rhs_result;
}
// AssignmentExpression : LeftHandSideExpression AssignmentOperator AssignmentExpression
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Let rref be the result of evaluating AssignmentExpression.
// 4. Let rval be ? GetValue(rref).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto rhs_result = TRY(m_rhs->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. Let assignmentOpText be the source text matched by AssignmentOperator.
// 6. Let opText be the sequence of Unicode code points associated with assignmentOpText in the following table:
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 7. Let r be ? ApplyStringOrNumericBinaryOperator(lval, opText, rval).
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
switch (m_op) {
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::AdditionAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(add(vm, lhs_result, rhs_result));
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::SubtractionAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(sub(vm, lhs_result, rhs_result));
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::MultiplicationAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(mul(vm, lhs_result, rhs_result));
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::DivisionAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(div(vm, lhs_result, rhs_result));
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
break;
LibJS: Implement modulo assignment operator (%=)
2020-05-04 23:07:05 +01:00
case AssignmentOp::ModuloAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(mod(vm, lhs_result, rhs_result));
LibJS: Implement modulo assignment operator (%=)
2020-05-04 23:07:05 +01:00
break;
LibJS: Implement exponentiation assignment operator (**=)
2020-05-04 23:03:35 +01:00
case AssignmentOp::ExponentiationAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(exp(vm, lhs_result, rhs_result));
LibJS: Implement exponentiation assignment operator (**=)
2020-05-04 23:03:35 +01:00
break;
LibJS: Implement bitwise assignment operators (&=, |=, ^=)
2020-05-04 22:34:45 +01:00
case AssignmentOp::BitwiseAndAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(bitwise_and(vm, lhs_result, rhs_result));
LibJS: Implement bitwise assignment operators (&=, |=, ^=)
2020-05-04 22:34:45 +01:00
break;
case AssignmentOp::BitwiseOrAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(bitwise_or(vm, lhs_result, rhs_result));
LibJS: Implement bitwise assignment operators (&=, |=, ^=)
2020-05-04 22:34:45 +01:00
break;
case AssignmentOp::BitwiseXorAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(bitwise_xor(vm, lhs_result, rhs_result));
LibJS: Implement bitwise assignment operators (&=, |=, ^=)
2020-05-04 22:34:45 +01:00
break;
LibJS: Implement bitwise left shift operator (<<)
2020-04-23 13:36:14 +01:00
case AssignmentOp::LeftShiftAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(left_shift(vm, lhs_result, rhs_result));
LibJS: Implement bitwise left shift operator (<<)
2020-04-23 13:36:14 +01:00
break;
LibJS: Implement bitwise right shift operator (>>)
2020-04-23 13:45:19 +01:00
case AssignmentOp::RightShiftAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(right_shift(vm, lhs_result, rhs_result));
LibJS: Implement bitwise right shift operator (>>)
2020-04-23 13:45:19 +01:00
break;
LibJS: Implement bitwise unsigned right shift operator (>>>)
2020-04-23 15:43:10 +01:00
case AssignmentOp::UnsignedRightShiftAssignment:
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
rhs_result = TRY(unsigned_right_shift(vm, lhs_result, rhs_result));
LibJS: Implement bitwise unsigned right shift operator (>>>)
2020-04-23 15:43:10 +01:00
break;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
case AssignmentOp::Assignment:
LibJS: Implement logical assignment operators (&&=, ||=, ??=) TC39 proposal, stage 4 as of 2020-07. https://tc39.es/proposal-logical-assignment/
2020-10-05 16:49:43 +01:00
case AssignmentOp::AndAssignment:
case AssignmentOp::OrAssignment:
case AssignmentOp::NullishAssignment:
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY_NOT_REACHED();
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 8. Perform ? PutValue(lref, r).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
TRY(reference.put_value(vm, rhs_result));
LibJS: Implement parsing and evaluation for AssignmentPatterns e.g. `[...foo] = bar` can now be evaluated :^)
2021-07-11 01:16:17 +04:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 9. Return r.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return rhs_result;
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.4.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-postfix-increment-operator-runtime-semantics-evaluation
// 13.4.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-postfix-decrement-operator-runtime-semantics-evaluation
// 13.4.4.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-prefix-increment-operator-runtime-semantics-evaluation
// 13.4.5.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-prefix-decrement-operator-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion UpdateExpression::execute(Interpreter& interpreter) const
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let expr be the result of evaluating <Expression>.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(m_argument->to_reference(interpreter));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Let oldValue be ? ToNumeric(? GetValue(expr)).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto old_value = TRY(reference.get_value(vm));
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
old_value = TRY(old_value.to_numeric(vm));
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
Value new_value;
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
switch (m_op) {
case UpdateOp::Increment:
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. If Type(oldValue) is Number, then
if (old_value.is_number()) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Let newValue be Number::add(oldValue, 1𝔽).
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
new_value = Value(old_value.as_double() + 1);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 4. Else,
else {
// a. Assert: Type(oldValue) is BigInt.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// b. Let newValue be BigInt::add(oldValue, 1ℤ).
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
new_value = BigInt::create(vm, old_value.as_bigint().big_integer().plus(Crypto::SignedBigInteger { 1 }));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
break;
case UpdateOp::Decrement:
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. If Type(oldValue) is Number, then
if (old_value.is_number()) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Let newValue be Number::subtract(oldValue, 1𝔽).
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
new_value = Value(old_value.as_double() - 1);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 4. Else,
else {
// a. Assert: Type(oldValue) is BigInt.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// b. Let newValue be BigInt::subtract(oldValue, 1ℤ).
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
new_value = BigInt::create(vm, old_value.as_bigint().big_integer().minus(Crypto::SignedBigInteger { 1 }));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
LibJS: Implement const variable declarations This also tightens the means of redeclaration of a variable by proxy, since we now have a way of knowing how a variable was initially declared, we can check if it was declared using `let` or `const` and not tolerate redeclaration like we did previously.
2020-03-12 14:24:34 +02:00
break;
LibJS: Improve UpdateExpression::execute() - Let undefined variables throw a ReferenceError by using Identifier::execute() rather than doing variable lookup manually and ASSERT()ing - Coerce value to number rather than ASSERT()ing - Make code DRY - Add tests
2020-04-21 23:27:11 +01:00
default:
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. Perform ? PutValue(expr, newValue).
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
TRY(reference.put_value(vm, new_value));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 6. Return newValue.
// 6. Return oldValue.
LibJS: Improve UpdateExpression::execute() - Let undefined variables throw a ReferenceError by using Identifier::execute() rather than doing variable lookup manually and ASSERT()ing - Coerce value to number rather than ASSERT()ing - Make code DRY - Add tests
2020-04-21 23:27:11 +01:00
return m_prefixed ? new_value : old_value;
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
}
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
void AssignmentExpression::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* op_string = nullptr;
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
switch (m_op) {
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::Assignment:
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
op_string = "=";
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::AdditionAssignment:
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
op_string = "+=";
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::SubtractionAssignment:
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
op_string = "-=";
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::MultiplicationAssignment:
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
op_string = "*=";
break;
LibJS: Tweak AssignmentOp names
2020-03-12 13:54:56 +01:00
case AssignmentOp::DivisionAssignment:
LibJS: Implement +=, -=, *=, and /= assignment operators
2020-03-12 23:09:15 +11:00
op_string = "/=";
break;
LibJS: Implement modulo assignment operator (%=)
2020-05-04 23:07:05 +01:00
case AssignmentOp::ModuloAssignment:
op_string = "%=";
break;
LibJS: Implement exponentiation assignment operator (**=)
2020-05-04 23:03:35 +01:00
case AssignmentOp::ExponentiationAssignment:
op_string = "**=";
break;
LibJS: Implement bitwise assignment operators (&=, |=, ^=)
2020-05-04 22:34:45 +01:00
case AssignmentOp::BitwiseAndAssignment:
op_string = "&=";
break;
case AssignmentOp::BitwiseOrAssignment:
op_string = "|=";
break;
case AssignmentOp::BitwiseXorAssignment:
op_string = "^=";
break;
LibJS: Implement bitwise left shift operator (<<)
2020-04-23 13:36:14 +01:00
case AssignmentOp::LeftShiftAssignment:
op_string = "<<=";
break;
LibJS: Implement bitwise right shift operator (>>)
2020-04-23 13:45:19 +01:00
case AssignmentOp::RightShiftAssignment:
op_string = ">>=";
break;
LibJS: Implement bitwise unsigned right shift operator (>>>)
2020-04-23 15:43:10 +01:00
case AssignmentOp::UnsignedRightShiftAssignment:
op_string = ">>>=";
break;
LibJS: Implement logical assignment operators (&&=, ||=, ??=) TC39 proposal, stage 4 as of 2020-07. https://tc39.es/proposal-logical-assignment/
2020-10-05 16:49:43 +01:00
case AssignmentOp::AndAssignment:
op_string = "&&=";
break;
case AssignmentOp::OrAssignment:
op_string = "||=";
break;
case AssignmentOp::NullishAssignment:
op_string = "\?\?=";
break;
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
ASTNode::dump(indent);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS: Implement parsing and evaluation for AssignmentPatterns e.g. `[...foo] = bar` can now be evaluated :^)
2021-07-11 01:16:17 +04:30
m_lhs.visit([&](auto& lhs) { lhs->dump(indent + 1); });
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
m_rhs->dump(indent + 1);
}
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
void UpdateExpression::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* op_string = nullptr;
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
switch (m_op) {
case UpdateOp::Increment:
op_string = "++";
break;
case UpdateOp::Decrement:
op_string = "--";
break;
}
ASTNode::dump(indent);
LibJS: Fix dump() indentation of UpdateExpression with suffix operator
2020-10-19 00:17:46 +01:00
if (m_prefixed) {
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS: Fix dump() indentation of UpdateExpression with suffix operator
2020-10-19 00:17:46 +01:00
}
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
m_argument->dump(indent + 1);
LibJS/AST: Implement prefixed update expressions
2020-03-14 20:44:57 +02:00
if (!m_prefixed) {
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", op_string);
LibJS/AST: Implement prefixed update expressions
2020-03-14 20:44:57 +02:00
}
LibJS: Implement update expressions Note that currently only the non-prefixed variant is supported (i.e i++ not ++i), this variant returns the value of the argument before the update.
2020-03-12 13:45:45 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.3.1.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-let-and-const-declarations-runtime-semantics-evaluation
// 14.3.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-variable-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion VariableDeclaration::execute(Interpreter& interpreter) const
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
for (auto& declarator : m_declarations) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (auto* init = declarator->init()) {
TRY(declarator->target().visit(
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<Identifier const> const& id) -> ThrowCompletionOr<void> {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(id->to_reference(interpreter));
auto initializer_result = TRY(interpreter.vm().named_evaluation_if_anonymous_function(*init, id->string()));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(!initializer_result.is_empty());
if (m_declaration_kind == DeclarationKind::Var)
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return reference.put_value(vm, initializer_result);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
else
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return reference.initialize_referenced_binding(vm, initializer_result);
LibJS: Implement destructuring assignments and function parameters
2021-05-29 16:03:19 +04:30
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& pattern) -> ThrowCompletionOr<void> {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto initializer_result = TRY(init->execute(interpreter)).release_value();
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
Environment* environment = m_declaration_kind == DeclarationKind::Var ? nullptr : interpreter.lexical_environment();
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
return vm.binding_initialization(pattern, initializer_result, environment);
LibJS: Convert the PutValue AO to ThrowCompletionOr
2021-11-02 19:20:21 +02:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
} else if (m_declaration_kind != DeclarationKind::Var) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(declarator->target().has<NonnullRefPtr<Identifier const>>());
auto& identifier = declarator->target().get<NonnullRefPtr<Identifier const>>();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(identifier->to_reference(interpreter));
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
TRY(reference.initialize_referenced_binding(vm, js_undefined()));
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
}
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return normal_completion({});
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion VariableDeclarator::execute(Interpreter& interpreter) const
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Handle return value in switch statement unwinding Fixes #3790.
2020-10-18 17:44:55 +01:00
// NOTE: VariableDeclarator execution is handled by VariableDeclaration.
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> VariableDeclaration::for_each_bound_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
for (auto const& entry : declarations()) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(entry->target().visit(
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<Identifier const> const& id) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return callback(id->string());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& binding) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return binding->for_each_bound_name([&](auto const& name) {
return callback(name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
});
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Add for_each_bound_identifier for AST::Declaration The same as for_each_bound_name but for identifiers.
2023-07-02 01:04:07 +03:00
ThrowCompletionOr<void> VariableDeclaration::for_each_bound_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
for (auto const& entry : declarations()) {
TRY(entry->target().visit(
[&](NonnullRefPtr<Identifier const> const& id) {
return callback(id);
},
[&](NonnullRefPtr<BindingPattern const> const& binding) {
return binding->for_each_bound_identifier([&](auto const& id) {
return callback(id);
});
}));
}
return {};
}
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
void VariableDeclaration::dump(int indent) const
{
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
char const* declaration_kind_string = nullptr;
LibJS: rename JS::DeclarationType => JS::DeclarationKind Many other parsers call it with this name. Also Type can be confusing in this context since the DeclarationType is not the type (number, string, etc.) of the variables that are being declared by the VariableDeclaration.
2020-04-08 11:59:18 +02:00
switch (m_declaration_kind) {
case DeclarationKind::Let:
declaration_kind_string = "Let";
LibJS: Allow the choice of a scope of declaration for a variable (#1408) Previously, we were assuming all declared variables were bound to a block scope, now, with the addition of declaration types, we can bind a variable to a block scope using `let`, or a function scope (the scope of the inner-most enclosing function of a `var` declaration) using `var`.
2020-03-11 21:09:20 +02:00
break;
LibJS: rename JS::DeclarationType => JS::DeclarationKind Many other parsers call it with this name. Also Type can be confusing in this context since the DeclarationType is not the type (number, string, etc.) of the variables that are being declared by the VariableDeclaration.
2020-04-08 11:59:18 +02:00
case DeclarationKind::Var:
declaration_kind_string = "Var";
LibJS: Implement const variable declarations This also tightens the means of redeclaration of a variable by proxy, since we now have a way of knowing how a variable was initially declared, we can check if it was declared using `let` or `const` and not tolerate redeclaration like we did previously.
2020-03-12 14:24:34 +02:00
break;
LibJS: rename JS::DeclarationType => JS::DeclarationKind Many other parsers call it with this name. Also Type can be confusing in this context since the DeclarationType is not the type (number, string, etc.) of the variables that are being declared by the VariableDeclaration.
2020-04-08 11:59:18 +02:00
case DeclarationKind::Const:
declaration_kind_string = "Const";
LibJS: Allow the choice of a scope of declaration for a variable (#1408) Previously, we were assuming all declared variables were bound to a block scope, now, with the addition of declaration types, we can bind a variable to a block scope using `let`, or a function scope (the scope of the inner-most enclosing function of a `var` declaration) using `var`.
2020-03-11 21:09:20 +02:00
break;
}
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
ASTNode::dump(indent);
LibJS: Allow the choice of a scope of declaration for a variable (#1408) Previously, we were assuming all declared variables were bound to a block scope, now, with the addition of declaration types, we can bind a variable to a block scope using `let`, or a function scope (the scope of the inner-most enclosing function of a `var` declaration) using `var`.
2020-03-11 21:09:20 +02:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{}", declaration_kind_string);
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
for (auto& declarator : m_declarations)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
declarator->dump(indent + 1);
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
}
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 6.2.1.2 Runtime Semantics: Evaluation, https://tc39.es/proposal-explicit-resource-management/#sec-let-and-const-declarations-runtime-semantics-evaluation
Completion UsingDeclaration::execute(Interpreter& interpreter) const
{
// 1. Let next be BindingEvaluation of BindingList with parameter sync-dispose.
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
for (auto& declarator : m_declarations) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(declarator->target().has<NonnullRefPtr<Identifier const>>());
VERIFY(declarator->init());
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto& id = declarator->target().get<NonnullRefPtr<Identifier const>>();
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 2. ReturnIfAbrupt(next).
auto reference = TRY(id->to_reference(interpreter));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto initializer_result = TRY(interpreter.vm().named_evaluation_if_anonymous_function(*declarator->init(), id->string()));
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
VERIFY(!initializer_result.is_empty());
TRY(reference.initialize_referenced_binding(vm, initializer_result, Environment::InitializeBindingHint::SyncDispose));
}
// 3. Return empty.
return normal_completion({});
}
ThrowCompletionOr<void> UsingDeclaration::for_each_bound_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
{
for (auto const& entry : m_declarations) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(entry->target().has<NonnullRefPtr<Identifier const>>());
TRY(callback(entry->target().get<NonnullRefPtr<Identifier const>>()->string()));
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
}
return {};
}
LibJS: Add for_each_bound_identifier for AST::Declaration The same as for_each_bound_name but for identifiers.
2023-07-02 01:04:07 +03:00
ThrowCompletionOr<void> UsingDeclaration::for_each_bound_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
for (auto const& entry : m_declarations) {
VERIFY(entry->target().has<NonnullRefPtr<Identifier const>>());
TRY(callback(entry->target().get<NonnullRefPtr<Identifier const>>()));
}
return {};
}
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
void UsingDeclaration::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
for (auto& declarator : m_declarations)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
declarator->dump(indent + 1);
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
}
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
void VariableDeclarator::dump(int indent) const
{
ASTNode::dump(indent);
Everywhere: Run clang-format
2022-04-01 20:58:27 +03:00
m_target.visit([indent](auto const& value) { value->dump(indent + 1); });
LibJS: Support VariableDeclaration with multiple declarators This patch adds support in the parser and interpreter for this: var a = 1, b = 2, c = a + b; VariableDeclaration is now a sequence of VariableDeclarators. :^)
2020-04-04 21:46:25 +02:00
if (m_init)
m_init->dump(indent + 1);
LibJS: Add basic support for (scoped) variables It's now possible to assign expressions to variables. The variables are put into the current scope of the interpreter. Variable lookup follows the scope chain, ending in the global object.
2020-03-09 21:13:55 +01:00
}
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
void ObjectProperty::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Fix null deref in ObjectProperty::dump()
2021-10-11 20:30:31 +02:00
if (m_property_type == Type::Spread) {
print_indent(indent + 1);
outln("...Spreading");
m_key->dump(indent + 1);
} else {
m_key->dump(indent + 1);
m_value->dump(indent + 1);
}
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
}
LibJS: Add a very simple ObjectExpression for "var x = {}" This allows us to allocate an empty new Object on the GC heap.
2020-03-09 21:28:31 +01:00
void ObjectExpression::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
for (auto& property : m_properties) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
property->dump(indent + 1);
LibJS: Parse object expressions
2020-03-21 02:29:00 +02:00
}
LibJS: Add a very simple ObjectExpression for "var x = {}" This allows us to allocate an empty new Object on the GC heap.
2020-03-09 21:28:31 +01:00
}
LibJS: Add Javascript lexer and parser This adds a basic Javascript lexer and parser. It can parse the currently existing demo programs. More work needs to be done to turn it into a complete parser than can parse arbitrary JS Code. The lexer outputs tokens with preceeding whitespace and comments in the trivia member. This should allow us to generate the exact source code by concatenating the generated tokens. The parser is written in a way that it always returns a complete syntax tree. Error conditions are represented as nodes in the tree. This simplifies the code and allows it to be used as an early stage parser, e.g for parsing JS documents in an IDE while editing the source code.:
2020-03-11 19:27:43 +01:00
void ExpressionStatement::dump(int indent) const
{
ASTNode::dump(indent);
m_expression->dump(indent + 1);
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ObjectProperty::execute(Interpreter& interpreter) const
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
// NOTE: ObjectProperty execution is handled by ObjectExpression.
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.5.4 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-object-initializer-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ObjectExpression::execute(Interpreter& interpreter) const
LibJS: Add a very simple ObjectExpression for "var x = {}" This allows us to allocate an empty new Object on the GC heap.
2020-03-09 21:28:31 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Let obj be OrdinaryObjectCreate(%Object.prototype%).
LibJS: Convert Object::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto object = Object::create(realm, realm.intrinsics().object_prototype());
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 2. Perform ? PropertyDefinitionEvaluation of PropertyDefinitionList with argument obj.
LibJS: Implement computed properties in object expressions
2020-04-23 19:37:53 +01:00
for (auto& property : m_properties) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto key = TRY(property->key().execute(interpreter)).release_value();
LibJS: Add spreading in object literals Supports spreading strings, arrays, and other objects within object literals.
2020-04-27 21:52:47 -07:00
LibJS: Use CopyDataProperties when spreading in object expressions Before this was a mix of different strategies but copy_data_properties does all of that in a spec way. This fixes numeric properties in object spreading. And ensures that any new properties added during spreading are not taken into account.
2022-02-13 02:04:37 +01:00
// PropertyDefinition : ... AssignmentExpression
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (property->type() == ObjectProperty::Type::Spread) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 4. Perform ? CopyDataProperties(object, fromValue, excludedNames).
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
TRY(object->copy_data_properties(vm, key, {}));
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return unused.
LibJS: Add spreading in object literals Supports spreading strings, arrays, and other objects within object literals.
2020-04-27 21:52:47 -07:00
continue;
}
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto value = TRY(property->value().execute(interpreter)).release_value();
LibJS: Add object literal getter/setter shorthand Adds support for the following syntax: let foo = { get x() { // ... }, set x(value) { // ... } }
2020-05-21 17:28:28 -07:00
LibJS: Implement the object literal __proto__ property key special case
2022-03-05 23:44:49 +02:00
// 8. If isProtoSetter is true, then
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (property->type() == ObjectProperty::Type::ProtoSetter) {
LibJS: Implement the object literal __proto__ property key special case
2022-03-05 23:44:49 +02:00
// a. If Type(propValue) is either Object or Null, then
if (value.is_object() || value.is_null()) {
// i. Perform ! object.[[SetPrototypeOf]](propValue).
MUST(object->internal_set_prototype_of(value.is_object() ? &value.as_object() : nullptr));
}
// b. Return unused.
continue;
}
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
auto property_key = TRY(PropertyKey::from_value(vm, key));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (property->is_method()) {
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
VERIFY(value.is_function());
LibJS: Move [[HomeObject]] to ECMAScriptFunctionObject
2021-09-24 23:49:24 +02:00
static_cast<ECMAScriptFunctionObject&>(value.as_function()).set_home_object(object);
LibJS: Initial class implementation; allow super expressions in object literal methods; add EnvrionmentRecord fields and methods to LexicalEnvironment Adding EnvrionmentRecord's fields and methods lets us throw an exception when |this| is not initialized, which occurs when the super constructor in a derived class has not yet been called, or when |this| has already been initialized (the super constructor was already called).
2020-06-08 13:31:21 -05:00
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
auto name = MUST(get_function_property_name(property_key));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (property->type() == ObjectProperty::Type::Getter) {
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
name = DeprecatedString::formatted("get {}", name);
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
} else if (property->type() == ObjectProperty::Type::Setter) {
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
name = DeprecatedString::formatted("set {}", name);
}
LibJS: Add object literal getter/setter shorthand Adds support for the following syntax: let foo = { get x() { // ... }, set x(value) { // ... } }
2020-05-21 17:28:28 -07:00
LibJS: Don't update names of resulting functions in object expression The only cases where the name should be set is if the function comes from a direct anonymous function expression.
2022-12-13 01:30:32 +01:00
update_function_name(value, name);
}
LibJS: Add object literal getter/setter shorthand Adds support for the following syntax: let foo = { get x() { // ... }, set x(value) { // ... } }
2020-05-21 17:28:28 -07:00
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
switch (property->type()) {
LibJS: Update Object::define_accessor() to take both getter and setter This replaces the current 'function plus boolean indicating the type' API, which makes it easier to set both getter and setter at once. This was already possible before but required two calls of this function, which wasn't intuitive: define_accessor(name, getter, true, ...); define_accessor(name, setter, false, ...); Which now becomes: define_accessor(name, getter, setter, ...);
2021-04-10 18:35:29 +02:00
case ObjectProperty::Type::Getter:
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY(value.is_function());
LibJS: Ensure we only call toString on computed properties once
2022-02-17 15:09:39 -08:00
object->define_direct_accessor(property_key, &value.as_function(), nullptr, Attribute::Configurable | Attribute::Enumerable);
LibJS: Update Object::define_accessor() to take both getter and setter This replaces the current 'function plus boolean indicating the type' API, which makes it easier to set both getter and setter at once. This was already possible before but required two calls of this function, which wasn't intuitive: define_accessor(name, getter, true, ...); define_accessor(name, setter, false, ...); Which now becomes: define_accessor(name, getter, setter, ...);
2021-04-10 18:35:29 +02:00
break;
case ObjectProperty::Type::Setter:
VERIFY(value.is_function());
LibJS: Ensure we only call toString on computed properties once
2022-02-17 15:09:39 -08:00
object->define_direct_accessor(property_key, nullptr, &value.as_function(), Attribute::Configurable | Attribute::Enumerable);
LibJS: Update Object::define_accessor() to take both getter and setter This replaces the current 'function plus boolean indicating the type' API, which makes it easier to set both getter and setter at once. This was already possible before but required two calls of this function, which wasn't intuitive: define_accessor(name, getter, true, ...); define_accessor(name, setter, false, ...); Which now becomes: define_accessor(name, getter, setter, ...);
2021-04-10 18:35:29 +02:00
break;
case ObjectProperty::Type::KeyValue:
LibJS: Remove a bunch of gratuitous JS namespace qualifiers
2022-04-03 15:19:33 +01:00
object->define_direct_property(property_key, value, default_attributes);
LibJS: Update Object::define_accessor() to take both getter and setter This replaces the current 'function plus boolean indicating the type' API, which makes it easier to set both getter and setter at once. This was already possible before but required two calls of this function, which wasn't intuitive: define_accessor(name, getter, true, ...); define_accessor(name, setter, false, ...); Which now becomes: define_accessor(name, getter, setter, ...);
2021-04-10 18:35:29 +02:00
break;
case ObjectProperty::Type::Spread:
default:
VERIFY_NOT_REACHED();
LibJS: Add object literal getter/setter shorthand Adds support for the following syntax: let foo = { get x() { // ... }, set x(value) { // ... } }
2020-05-21 17:28:28 -07:00
}
LibJS: Check for exceptions in a lot more places
2020-03-27 15:35:35 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Return obj.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return Value { object };
LibJS: Add a very simple ObjectExpression for "var x = {}" This allows us to allocate an empty new Object on the GC heap.
2020-03-09 21:28:31 +01:00
}
LibJS: Support "hello friends".length The above snippet is a MemberExpression that necessitates the implicit construction of a StringObject wrapper around a PrimitiveString. We then do a property lookup (a "get") on the StringObject, where we find the "length" property. This is pretty neat! :^)
2020-03-11 18:58:19 +01:00
void MemberExpression::dump(int indent) const
{
LibJS: Parse computed MemberExpressions MemberExpression comes in two flavors: computed: a[b] non-computed: a.b We can now parse both of the types. :^)
2020-03-20 20:51:03 +01:00
print_indent(indent);
LibJS: Remove stray '%' from MemberExpression AST dump
2021-04-24 13:49:43 +02:00
outln("{}(computed={})", class_name(), is_computed());
LibJS: Support "hello friends".length The above snippet is a MemberExpression that necessitates the implicit construction of a StringObject wrapper around a PrimitiveString. We then do a property lookup (a "get") on the StringObject, where we find the "length" property. This is pretty neat! :^)
2020-03-11 18:58:19 +01:00
m_object->dump(indent + 1);
m_property->dump(indent + 1);
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
DeprecatedString MemberExpression::to_string_approximation() const
LibJS: Improve CallExpression::execute()'s error messages
2020-04-19 01:12:51 +01:00
{
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
DeprecatedString object_string = "<object>";
LibJS: Remove hand-rolled type information in JS AST in favor of RTTI
2021-01-01 19:34:07 +01:00
if (is<Identifier>(*m_object))
LibJS: Switch AST.{h,cpp} to east const
2021-06-11 02:13:06 +04:30
object_string = static_cast<Identifier const&>(*m_object).string();
LibJS: Improve CallExpression::execute()'s error messages
2020-04-19 01:12:51 +01:00
if (is_computed())
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
return DeprecatedString::formatted("{}[<computed>]", object_string);
LibJS/Bytecode: Don't choke on MemberExpression with PrivateIdentifier
2023-06-15 12:38:28 +02:00
if (is<PrivateIdentifier>(*m_property))
return DeprecatedString::formatted("{}.{}", object_string, verify_cast<PrivateIdentifier>(*m_property).string());
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
return DeprecatedString::formatted("{}.{}", object_string, verify_cast<Identifier>(*m_property).string());
LibJS: Improve CallExpression::execute()'s error messages
2020-04-19 01:12:51 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.2.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-property-accessors-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion MemberExpression::execute(Interpreter& interpreter) const
LibJS: Support "hello friends".length The above snippet is a MemberExpression that necessitates the implicit construction of a StringObject wrapper around a PrimitiveString. We then do a property lookup (a "get") on the StringObject, where we find the "length" property. This is pretty neat! :^)
2020-03-11 18:58:19 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto reference = TRY(to_reference(interpreter));
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
return TRY(reference.get_value(vm));
LibJS: Support "hello friends".length The above snippet is a MemberExpression that necessitates the implicit construction of a StringObject wrapper around a PrimitiveString. We then do a property lookup (a "get") on the StringObject, where we find the "length" property. This is pretty neat! :^)
2020-03-11 18:58:19 +01:00
}
LibJS: Add parsing and evaluation of private fields and methods
2021-10-12 22:45:52 +02:00
bool MemberExpression::ends_in_private_name() const
{
if (is_computed())
return false;
if (is<PrivateIdentifier>(*m_property))
return true;
if (is<MemberExpression>(*m_property))
return static_cast<MemberExpression const&>(*m_property).ends_in_private_name();
return false;
}
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
void OptionalChain::dump(int indent) const
{
print_indent(indent);
outln("{}", class_name());
m_base->dump(indent + 1);
for (auto& reference : m_references) {
reference.visit(
[&](Call const& call) {
print_indent(indent + 1);
outln("Call({})", call.mode == Mode::Optional ? "Optional" : "Not Optional");
for (auto& argument : call.arguments)
argument.value->dump(indent + 2);
},
[&](ComputedReference const& ref) {
print_indent(indent + 1);
outln("ComputedReference({})", ref.mode == Mode::Optional ? "Optional" : "Not Optional");
ref.expression->dump(indent + 2);
},
[&](MemberReference const& ref) {
print_indent(indent + 1);
outln("MemberReference({})", ref.mode == Mode::Optional ? "Optional" : "Not Optional");
ref.identifier->dump(indent + 2);
LibJS: Implement private identifiers in optional chains
2021-10-18 23:32:47 +02:00
},
[&](PrivateMemberReference const& ref) {
print_indent(indent + 1);
outln("PrivateMemberReference({})", ref.mode == Mode::Optional ? "Optional" : "Not Optional");
ref.private_identifier->dump(indent + 2);
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
});
}
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<OptionalChain::ReferenceAndValue> OptionalChain::to_reference_and_value(Interpreter& interpreter) const
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
{
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
auto& vm = interpreter.vm();
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto base_reference = TRY(m_base->to_reference(interpreter));
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
auto base = base_reference.is_unresolvable()
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
? TRY(m_base->execute(interpreter)).release_value()
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
: TRY(base_reference.get_value(vm));
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
for (auto& reference : m_references) {
auto is_optional = reference.visit([](auto& ref) { return ref.mode; }) == Mode::Optional;
if (is_optional && base.is_nullish())
return ReferenceAndValue { {}, js_undefined() };
auto expression = reference.visit(
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](Call const& call) -> NonnullRefPtr<Expression const> {
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
return CallExpression::create(source_range(),
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
create_ast_node<SyntheticReferenceExpression>(source_range(), base_reference, base),
LibJS: Correctly handle parentheses and new Object Parses `new Object()?.foo`, `(new Object)?.foo` and shows syntax error on `new Object?.foo`
2023-06-15 15:13:48 +05:30
call.arguments, InvocationStyleEnum::Parenthesized, InsideParenthesesEnum::NotInsideParentheses);
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](ComputedReference const& ref) -> NonnullRefPtr<Expression const> {
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
return create_ast_node<MemberExpression>(source_range(),
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
create_ast_node<SyntheticReferenceExpression>(source_range(), base_reference, base),
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
ref.expression,
true);
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](MemberReference const& ref) -> NonnullRefPtr<Expression const> {
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
return create_ast_node<MemberExpression>(source_range(),
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
create_ast_node<SyntheticReferenceExpression>(source_range(), base_reference, base),
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
ref.identifier,
false);
LibJS: Implement private identifiers in optional chains
2021-10-18 23:32:47 +02:00
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](PrivateMemberReference const& ref) -> NonnullRefPtr<Expression const> {
LibJS: Implement private identifiers in optional chains
2021-10-18 23:32:47 +02:00
return create_ast_node<MemberExpression>(source_range(),
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
create_ast_node<SyntheticReferenceExpression>(source_range(), base_reference, base),
LibJS: Implement private identifiers in optional chains
2021-10-18 23:32:47 +02:00
ref.private_identifier,
false);
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
});
if (is<CallExpression>(*expression)) {
base_reference = JS::Reference {};
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
base = TRY(expression->execute(interpreter)).release_value();
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
} else {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
base_reference = TRY(expression->to_reference(interpreter));
LibJS: Replace GlobalObject with VM in Reference AOs [Part 6/19]
2022-08-21 15:39:13 +01:00
base = TRY(base_reference.get_value(vm));
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
}
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return ReferenceAndValue { move(base_reference), base };
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.9.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-optional-chaining-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion OptionalChain::execute(Interpreter& interpreter) const
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return TRY(to_reference_and_value(interpreter)).value;
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<JS::Reference> OptionalChain::to_reference(Interpreter& interpreter) const
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
{
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return TRY(to_reference_and_value(interpreter)).reference;
LibJS: Implement parsing and execution of optional chains
2021-09-14 06:56:31 +04:30
}
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
void MetaProperty::dump(int indent) const
{
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
DeprecatedString name;
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
if (m_type == MetaProperty::Type::NewTarget)
name = "new.target";
else if (m_type == MetaProperty::Type::ImportMeta)
name = "import.meta";
else
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("{} {}", class_name(), name);
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.12.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-meta-properties-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion MetaProperty::execute(Interpreter& interpreter) const
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// NewTarget : new . target
if (m_type == MetaProperty::Type::NewTarget) {
// 1. Return GetNewTarget().
LibJS: Ensure get_new_target() never returns an empty value Also add spec comments and remove a redundant exception check while we're here :^)
2021-12-28 23:50:23 +01:00
return interpreter.vm().get_new_target();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// ImportMeta : import . meta
LibJS: Parse dynamic import calls 'import()' and 'import.meta' For now both just throw when executing but this can be implemented when modules are implemented :^).
2021-11-26 23:45:10 +01:00
if (m_type == MetaProperty::Type::ImportMeta) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Let module be GetActiveScriptOrModule().
LibJS: Implement the ImportMeta MetaProperty This "standard" implementation of this is to do nothing.
2022-01-18 19:40:43 +01:00
auto script_or_module = interpreter.vm().get_active_script_or_module();
// 2. Assert: module is a Source Text Module Record.
LibJS: Make Script and Module GC-allocated This ensures that code currently in any active or saved execution stack always stays alive.
2022-09-05 14:31:25 +02:00
VERIFY(script_or_module.has<NonnullGCPtr<Module>>());
VERIFY(script_or_module.get<NonnullGCPtr<Module>>());
VERIFY(is<SourceTextModule>(*script_or_module.get<NonnullGCPtr<Module>>()));
auto& module = static_cast<SourceTextModule&>(*script_or_module.get<NonnullGCPtr<Module>>());
LibJS: Implement the ImportMeta MetaProperty This "standard" implementation of this is to do nothing.
2022-01-18 19:40:43 +01:00
// 3. Let importMeta be module.[[ImportMeta]].
auto* import_meta = module.import_meta();
// 4. If importMeta is empty, then
if (import_meta == nullptr) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Set importMeta to OrdinaryObjectCreate(null).
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
import_meta = Object::create(realm, nullptr);
LibJS: Implement the ImportMeta MetaProperty This "standard" implementation of this is to do nothing.
2022-01-18 19:40:43 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// b. Let importMetaValues be HostGetImportMetaProperties(module).
LibJS: Implement the ImportMeta MetaProperty This "standard" implementation of this is to do nothing.
2022-01-18 19:40:43 +01:00
auto import_meta_values = interpreter.vm().host_get_import_meta_properties(module);
// c. For each Record { [[Key]], [[Value]] } p of importMetaValues, do
for (auto& entry : import_meta_values) {
// i. Perform ! CreateDataPropertyOrThrow(importMeta, p.[[Key]], p.[[Value]]).
MUST(import_meta->create_data_property_or_throw(entry.key, entry.value));
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// d. Perform HostFinalizeImportMeta(importMeta, module).
LibJS: Implement the ImportMeta MetaProperty This "standard" implementation of this is to do nothing.
2022-01-18 19:40:43 +01:00
interpreter.vm().host_finalize_import_meta(import_meta, module);
// e. Set module.[[ImportMeta]] to importMeta.
module.set_import_meta({}, import_meta);
// f. Return importMeta.
return Value { import_meta };
}
// 5. Else,
else {
// a. Assert: Type(importMeta) is Object.
// Note: This is always true by the type.
// b. Return importMeta.
return Value { import_meta };
}
LibJS: Parse dynamic import calls 'import()' and 'import.meta' For now both just throw when executing but this can be implemented when modules are implemented :^).
2021-11-26 23:45:10 +01:00
}
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Implement 'new.target' This adds a new MetaProperty AST node which will be used for 'new.target' and 'import.meta' meta properties. The parser now distinguishes between "in function context" and "in arrow function context" (which is required for this). When encountering TokenType::New we will attempt to parse it as meta property and resort to regular new expression parsing if that fails, much like the parsing of labelled statements.
2020-11-02 21:27:42 +00:00
}
LibJS: Parse dynamic import calls 'import()' and 'import.meta' For now both just throw when executing but this can be implemented when modules are implemented :^).
2021-11-26 23:45:10 +01:00
void ImportCall::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("(Specifier)");
m_specifier->dump(indent + 1);
if (m_options) {
outln("(Options)");
m_options->dump(indent + 1);
}
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.10.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-import-call-runtime-semantics-evaluation
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
// Also includes assertions from proposal: https://tc39.es/proposal-import-assertions/#sec-import-call-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ImportCall::execute(Interpreter& interpreter) const
LibJS: Parse dynamic import calls 'import()' and 'import.meta' For now both just throw when executing but this can be implemented when modules are implemented :^).
2021-11-26 23:45:10 +01:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Implement ImportCall and HostImportModuleDynamically This allows us to load modules from scripts. This can be dangerous as it can load arbitrary files. Because of that it fails and throws by default. Currently, only js and JavaScriptTestRunner enable the default hook. This also adds tests to test-js which test module code. Because we form a spec perspective can't "enter" a module this is the easiest way to run tests without having to modify test-js to have special cases for modules. To specify modules in test-js we use the extension '.mjs' this is to ensure the files are not executed. We do still want to lint these files so the prettier scripts have changed to look for '.mjs' files as well.
2022-01-18 19:39:36 +01:00
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
// 2. Let specifierRef be the result of evaluating specifierExpression.
// 3. Let specifier be ? GetValue(specifierRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto specifier = TRY(m_specifier->execute(interpreter));
LibJS: Implement ImportCall and HostImportModuleDynamically This allows us to load modules from scripts. This can be dangerous as it can load arbitrary files. Because of that it fails and throws by default. Currently, only js and JavaScriptTestRunner enable the default hook. This also adds tests to test-js which test module code. Because we form a spec perspective can't "enter" a module this is the easiest way to run tests without having to modify test-js to have special cases for modules. To specify modules in test-js we use the extension '.mjs' this is to ensure the files are not executed. We do still want to lint these files so the prettier scripts have changed to look for '.mjs' files as well.
2022-01-18 19:39:36 +01:00
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
auto options_value = js_undefined();
// 4. If optionsExpression is present, then
if (m_options) {
// a. Let optionsRef be the result of evaluating optionsExpression.
// b. Let options be ? GetValue(optionsRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
options_value = TRY(m_options->execute(interpreter)).release_value();
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
}
// 5. Else,
// a. Let options be undefined.
// Note: options_value is undefined by default.
LibJS/Bytecode: Add codegen for ImportCall Also moved most of the AST ImportCall::execute() into a helper so we can share the code.
2023-06-24 15:22:16 +02:00
return perform_import_call(vm, *specifier, options_value);
LibJS: Parse dynamic import calls 'import()' and 'import.meta' For now both just throw when executing but this can be implemented when modules are implemented :^).
2021-11-26 23:45:10 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion StringLiteral::execute(Interpreter& interpreter) const
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace standalone js_string() with PrimitiveString::create() Note that js_rope_string() has been folded into this, the old name was misleading - it would not always create a rope string, only if both sides are not empty strings. Use a three-argument create() overload instead.
2022-12-06 22:17:27 +00:00
auto& vm = interpreter.vm();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return the SV of StringLiteral as defined in 12.8.4.2.
LibJS: Replace standalone js_string() with PrimitiveString::create() Note that js_rope_string() has been folded into this, the old name was misleading - it would not always create a rope string, only if both sides are not empty strings. Use a three-argument create() overload instead.
2022-12-06 22:17:27 +00:00
return Value { PrimitiveString::create(vm, m_value) };
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion NumericLiteral::execute(Interpreter& interpreter) const
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return the NumericValue of NumericLiteral as defined in 12.8.3.
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
return Value(m_value);
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion BigIntLiteral::execute(Interpreter& interpreter) const
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
auto& vm = interpreter.vm();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return the NumericValue of NumericLiteral as defined in 12.8.3.
LibJS: Add support for hex, octal & binary big integer literals
2021-06-14 02:19:23 +03:00
Crypto::SignedBigInteger integer;
if (m_value[0] == '0' && m_value.length() >= 3) {
if (m_value[1] == 'x' || m_value[1] == 'X') {
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
return Value { BigInt::create(vm, Crypto::SignedBigInteger::from_base(16, m_value.substring(2, m_value.length() - 3))) };
LibJS: Add support for hex, octal & binary big integer literals
2021-06-14 02:19:23 +03:00
} else if (m_value[1] == 'o' || m_value[1] == 'O') {
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
return Value { BigInt::create(vm, Crypto::SignedBigInteger::from_base(8, m_value.substring(2, m_value.length() - 3))) };
LibJS: Add support for hex, octal & binary big integer literals
2021-06-14 02:19:23 +03:00
} else if (m_value[1] == 'b' || m_value[1] == 'B') {
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
return Value { BigInt::create(vm, Crypto::SignedBigInteger::from_base(2, m_value.substring(2, m_value.length() - 3))) };
LibJS: Add support for hex, octal & binary big integer literals
2021-06-14 02:19:23 +03:00
}
}
LibJS: Replace standalone js_bigint() with BigInt::create() Three standalone Cell creation functions remain in the JS namespace: - js_bigint() - js_string() - js_symbol() All of them are leftovers from early iterations when LibJS still took inspiration from JSC, which itself has jsString(). Nowadays, we pretty much exclusively use static create() functions to construct types allocated on the JS heap, and there's no reason to not do the same for these. Also change the return type from BigInt* to NonnullGCPtr<BigInt> while we're here. This is patch 1/3, replacement of js_string() and js_symbol() follow.
2022-12-06 22:03:52 +00:00
return Value { BigInt::create(vm, Crypto::SignedBigInteger::from_base(10, m_value.substring(0, m_value.length() - 1))) };
LibJS: Add BigInt
2020-06-06 01:14:10 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion BooleanLiteral::execute(Interpreter& interpreter) const
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. If BooleanLiteral is the token false, return false.
// 2. If BooleanLiteral is the token true, return true.
LibJS: Defer Value construction until a Literal is executed Remove the need to construct a full Value during parsing. This means we don't have to worry about plumbing the heap into the parser. The Literal ASTNode now has a bunch of subclasses that synthesize a Value on demand.
2020-03-12 12:19:11 +01:00
return Value(m_value);
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.3.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion NullLiteral::execute(Interpreter& interpreter) const
LibJS: Implement null and undefined literals
2020-03-15 23:32:34 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Return null.
LibJS: Implement null and undefined literals
2020-03-15 23:32:34 +02:00
return js_null();
}
LibJS: Lex and parse regex literals, add RegExp objects This adds regex parsing/lexing, as well as a relatively empty RegExpObject. The purpose of this patch is to allow the engine to not get hung up on parsing regexes. This will aid in finding new syntax errors (say, from google or twitter) without having to replace all of their regexes first!
2020-06-03 16:05:49 -07:00
void RegExpLiteral::dump(int indent) const
{
print_indent(indent);
LibJS: Rename RegExpLiteral m_content to m_pattern This is what we call it elsewhere, let's be consistent.
2021-05-10 11:56:08 +01:00
outln("{} (/{}/{})", class_name(), pattern(), flags());
LibJS: Lex and parse regex literals, add RegExp objects This adds regex parsing/lexing, as well as a relatively empty RegExpObject. The purpose of this patch is to allow the engine to not get hung up on parsing regexes. This will aid in finding new syntax errors (say, from google or twitter) without having to replace all of their regexes first!
2020-06-03 16:05:49 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.7.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-regular-expression-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion RegExpLiteral::execute(Interpreter& interpreter) const
LibJS: Lex and parse regex literals, add RegExp objects This adds regex parsing/lexing, as well as a relatively empty RegExpObject. The purpose of this patch is to allow the engine to not get hung up on parsing regexes. This will aid in finding new syntax errors (say, from google or twitter) without having to replace all of their regexes first!
2020-06-03 16:05:49 -07:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& vm = interpreter.vm();
auto& realm = *vm.current_realm();
LibJS: Parse RegExp literals at AST creation time, not execution time The spec requires that invalid RegExp literals must cause a Syntax Error before the JavaScript is executed. See: https://tc39.es/ecma262/#sec-patterns-static-semantics-early-errors This is explicitly tested in the RegExp/property-escapes test262 tests. For example, see unsupported-property-Line_Break.js: $DONOTEVALUATE(); /\p{Line_Break}/u; That RegExp literal is invalid because Line_Break is not a supported Unicode property. $DONOTEVALUATE() just throws an exception when it is executed. The test expects that this file will fail to be parsed. Note that RegExp patterns can still be parsed at execution time by way of "new RegExp(...)".
2021-07-29 10:34:37 -04:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Let pattern be CodePointsToString(BodyText of RegularExpressionLiteral).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
auto pattern = this->pattern();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Let flags be CodePointsToString(FlagText of RegularExpressionLiteral).
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
auto flags = this->flags();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Return ! RegExpCreate(pattern, flags).
LibJS: Parse RegExp literals at AST creation time, not execution time The spec requires that invalid RegExp literals must cause a Syntax Error before the JavaScript is executed. See: https://tc39.es/ecma262/#sec-patterns-static-semantics-early-errors This is explicitly tested in the RegExp/property-escapes test262 tests. For example, see unsupported-property-Line_Break.js: $DONOTEVALUATE(); /\p{Line_Break}/u; That RegExp literal is invalid because Line_Break is not a supported Unicode property. $DONOTEVALUATE() just throws an exception when it is executed. The test expects that this file will fail to be parsed. Note that RegExp patterns can still be parsed at execution time by way of "new RegExp(...)".
2021-07-29 10:34:37 -04:00
Regex<ECMA262> regex(parsed_regex(), parsed_pattern(), parsed_flags());
LibJS: Implement RegExp legacy static properties RegExp legacy static properties Spec url is https://github.com/tc39/proposal-regexp-legacy-features
2022-10-17 08:59:27 +08:00
// NOTE: We bypass RegExpCreate and subsequently RegExpAlloc as an optimization to use the already parsed values.
LibJS: Convert RegExpObject::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto regexp_object = RegExpObject::create(realm, move(regex), move(pattern), move(flags));
LibJS: Implement RegExp legacy static properties RegExp legacy static properties Spec url is https://github.com/tc39/proposal-regexp-legacy-features
2022-10-17 08:59:27 +08:00
// RegExpAlloc has these two steps from the 'Legacy RegExp features' proposal.
regexp_object->set_realm(*vm.current_realm());
// We don't need to check 'If SameValue(newTarget, thisRealm.[[Intrinsics]].[[%RegExp%]]) is true'
// here as we know RegExpCreate calls RegExpAlloc with %RegExp% for newTarget.
regexp_object->set_legacy_features_enabled(true);
return Value { regexp_object };
LibJS: Lex and parse regex literals, add RegExp objects This adds regex parsing/lexing, as well as a relatively empty RegExpObject. The purpose of this patch is to allow the engine to not get hung up on parsing regexes. This will aid in finding new syntax errors (say, from google or twitter) without having to replace all of their regexes first!
2020-06-03 16:05:49 -07:00
}
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
void ArrayExpression::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& element : m_elements) {
LibJS: Support empty values in array expression
2020-04-15 20:09:06 +01:00
if (element) {
element->dump(indent + 1);
} else {
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("<empty>");
LibJS: Support empty values in array expression
2020-04-15 20:09:06 +01:00
}
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
}
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.4.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-array-initializer-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ArrayExpression::execute(Interpreter& interpreter) const
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
auto& vm = interpreter.vm();
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let array be ! ArrayCreate(0).
LibJS: Convert Array::create{,_from}() to NonnullGCPtr
2022-12-13 20:49:49 +00:00
auto array = MUST(Array::create(realm, 0));
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Perform ? ArrayAccumulation of ElementList with arguments array and 0.
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
Everywhere: Make ByteBuffer::{create_*,copy}() OOM-safe
2021-09-06 03:29:52 +04:30
array->indexed_properties();
size_t index = 0;
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
for (auto& element : m_elements) {
LibJS: Support empty values in array expression
2020-04-15 20:09:06 +01:00
auto value = Value();
if (element) {
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
value = TRY(element->execute(interpreter)).release_value();
LibJS: Add spreading in array literals Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
2020-04-26 23:05:37 -07:00
LibJS: Remove hand-rolled type information in JS AST in favor of RTTI
2021-01-01 19:34:07 +01:00
if (is<SpreadExpression>(*element)) {
LibJS: Replace GlobalObject with VM in Iterator AOs [Part 7/19]
2022-08-21 15:56:27 +01:00
(void)TRY(get_iterator_values(vm, value, [&](Value iterator_value) -> Optional<Completion> {
Everywhere: Make ByteBuffer::{create_*,copy}() OOM-safe
2021-09-06 03:29:52 +04:30
array->indexed_properties().put(index++, iterator_value, default_attributes);
LibJS: Integrate iterator protocol into language features Finally use Symbol.iterator protocol in language features :) currently only used in for-of loops and spread expressions, but will have more uses later (Maps, Sets, Array.from, etc).
2020-07-13 08:27:20 -07:00
return {};
LibJS: Convert get_iterator_values helper to ThrowCompletionOr This one is a bit unusual, so to clarify: Previously, callers of get_iterator_values() would supply a callback that would return an IterationDecision, and an enum to indicate whether iterator_close() should be invoked upon IterationDecision::Break. Now, use of both those enums is removed, and callers must return an Optional<Completion>. If a Completion is provided, the iterator will be closed, and that completion will be returned from get_iterator_values. Otherwise, once the iterator is exhausted, a default-initialized Completion will be returned.
2021-10-20 12:10:23 -04:00
}));
LibJS: Integrate iterator protocol into language features Finally use Symbol.iterator protocol in language features :) currently only used in for-of loops and spread expressions, but will have more uses later (Maps, Sets, Array.from, etc).
2020-07-13 08:27:20 -07:00
continue;
LibJS: Add spreading in array literals Implement the syntax and behavor necessary to support array literals such as [...[1, 2, 3]]. A type error is thrown if the target of the spread operator does not evaluate to an array (though it should eventually just check for an iterable). Note that the spread token's name is TripleDot, since the '...' token is used for two features: spread and rest. Calling it anything involving 'spread' or 'rest' would be a bit confusing.
2020-04-26 23:05:37 -07:00
}
LibJS: Support empty values in array expression
2020-04-15 20:09:06 +01:00
}
Everywhere: Make ByteBuffer::{create_*,copy}() OOM-safe
2021-09-06 03:29:52 +04:30
array->indexed_properties().put(index++, value, default_attributes);
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. Return array.
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return Value { array };
LibJS: Parse ArrayExpression and start implementing Array objects Note that property lookup is not functional yet.
2020-03-20 20:29:57 +01:00
}
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
void TemplateLiteral::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
for (auto& expression : m_expressions)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
expression->dump(indent + 1);
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.2.8.5 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-template-literals-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion TemplateLiteral::execute(Interpreter& interpreter) const
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in Value AOs [Part 4/19] This is where the fun begins. :^)
2022-08-21 14:00:56 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
StringBuilder string_builder;
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
for (auto& expression : m_expressions) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let head be the TV of TemplateHead as defined in 12.8.6.
// 2. Let subRef be the result of evaluating Expression.
// 3. Let sub be ? GetValue(subRef).
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto sub = TRY(expression->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 4. Let middle be ? ToString(sub).
LibJS+Everywhere: Rename Value::to_string to to_deprecated_string
2023-01-13 10:29:02 -05:00
auto string = TRY(sub.to_deprecated_string(vm));
LibJS: Add side-effect-free version of Value::to_string() There are now two API's on Value: - Value::to_string(Interpreter&) -- may throw. - Value::to_string_without_side_effects() -- will never throw. These are some pretty big sweeping changes, so it's possible that I did some part the wrong way. We'll work it out as we go. :^) Fixes #2123.
2020-05-15 13:39:24 +02:00
string_builder.append(string);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 5. Let tail be the result of evaluating TemplateSpans.
// 6. ReturnIfAbrupt(tail).
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 7. Return the string-concatenation of head, middle, and tail.
AK: Remove StringBuilder::build() in favor of to_deprecated_string() Having an alias function that only wraps another one is silly, and keeping the more obvious name should flush out more uses of deprecated strings. No behavior change.
2023-01-26 18:58:09 +00:00
return Value { PrimitiveString::create(vm, string_builder.to_deprecated_string()) };
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
}
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
void TaggedTemplateLiteral::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Tag)");
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
m_tag->dump(indent + 2);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Template Literal)");
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
m_template_literal->dump(indent + 2);
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.3.11.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-tagged-templates-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion TaggedTemplateLiteral::execute(Interpreter& interpreter) const
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto& vm = interpreter.vm();
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// NOTE: This is both
// MemberExpression : MemberExpression TemplateLiteral
// CallExpression : CallExpression TemplateLiteral
// 1. Let tagRef be ? Evaluation of MemberExpression.
// 1. Let tagRef be ? Evaluation of CallExpression.
// 2. Let tagFunc be ? GetValue(tagRef).
LibJS: Use correct this value for tagged template calls This has to get quite messy because we currently do evaluation to value and reference separately meaning we have to deal with a lot of edge cases here.
2022-11-15 01:18:08 +01:00
// NOTE: This is much more complicated than the spec because we have to
// handle every type of reference. If we handle evaluation closer
// to the spec this could be improved.
Value tag_this_value;
Value tag;
if (auto tag_reference = TRY(m_tag->to_reference(interpreter)); tag_reference.is_valid_reference()) {
tag = TRY(tag_reference.get_value(vm));
if (tag_reference.is_environment_reference()) {
auto& environment = tag_reference.base_environment();
if (environment.has_this_binding())
tag_this_value = TRY(environment.get_this_binding(vm));
else
tag_this_value = js_undefined();
} else {
tag_this_value = tag_reference.get_this_value();
}
} else {
auto result = TRY(m_tag->execute(interpreter));
VERIFY(result.has_value());
tag = result.release_value();
tag_this_value = js_undefined();
}
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 3. Let thisCall be this CallExpression.
// 3. Let thisCall be this MemberExpression.
// FIXME: 4. Let tailCall be IsInTailPosition(thisCall).
// NOTE: A tagged template is a function call where the arguments of the call are derived from a
// TemplateLiteral (13.2.8). The actual arguments include a template object (13.2.8.3)
// and the values produced by evaluating the expressions embedded within the TemplateLiteral.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto template_ = TRY(get_template_object(interpreter));
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
MarkedVector<Value> arguments(interpreter.vm().heap());
arguments.append(template_);
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
auto& expressions = m_template_literal->expressions();
LibJS: Add raw strings to tagged template literals When calling a function with a tagged template, the first array that is passed in now contains a "raw" property with the raw, escaped strings.
2020-05-06 16:34:14 -07:00
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// tag`${foo}` -> "", foo, "" -> tag(["", ""], foo)
// tag`foo${bar}baz${qux}` -> "foo", bar, "baz", qux, "" -> tag(["foo", "baz", ""], bar, qux)
// So we want all the odd expressions
for (size_t i = 1; i < expressions.size(); i += 2)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
arguments.append(TRY(expressions[i]->execute(interpreter)).release_value());
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 5. Return ? EvaluateCall(tagFunc, tagRef, TemplateLiteral, tailCall).
LibJS: Use correct this value for tagged template calls This has to get quite messy because we currently do evaluation to value and reference separately meaning we have to deal with a lot of edge cases here.
2022-11-15 01:18:08 +01:00
return call(vm, tag, tag_this_value, move(arguments));
LibJS: Implement tagged template literals (foo`bar`) To make processing tagged template literals easier, template literals will now add one empty StringLiteral before and after each template expression *if* there's no other string - e.g.: `${foo}` -> "", foo, "" `test${foo}${bar}test` -> "test", foo, "", bar, "test" This also matches the behaviour of many other parsers.
2020-05-06 10:17:35 +01:00
}
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 13.2.8.3 GetTemplateObject ( templateLiteral ), https://tc39.es/ecma262/#sec-gettemplateobject
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
ThrowCompletionOr<Value> TaggedTemplateLiteral::get_template_object(Interpreter& interpreter) const
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& vm = interpreter.vm();
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 1. Let realm be the current Realm Record.
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
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auto& realm = *vm.current_realm();
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 2. Let templateRegistry be realm.[[TemplateMap]].
// 3. For each element e of templateRegistry, do
// a. If e.[[Site]] is the same Parse Node as templateLiteral, then
// i. Return e.[[Array]].
// NOTE: Instead of caching on the realm we cache on the Parse Node side as
// this makes it easier to track whether it is the same parse node.
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
if (auto cached_value_or_end = m_cached_values.find(&realm); cached_value_or_end != m_cached_values.end())
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
return Value { cached_value_or_end->value.cell() };
// 4. Let rawStrings be TemplateStrings of templateLiteral with argument true.
auto& raw_strings = m_template_literal->raw_strings();
// 5. Let cookedStrings be TemplateStrings of templateLiteral with argument false.
auto& expressions = m_template_literal->expressions();
// 6. Let count be the number of elements in the List cookedStrings.
// NOTE: Only the even expression in expression are the cooked strings
// so we use rawStrings for the size here
VERIFY(raw_strings.size() == (expressions.size() + 1) / 2);
auto count = raw_strings.size();
// 7. Assert: count ≤ 2^32 - 1.
VERIFY(count <= 0xffffffff);
// 8. Let template be ! ArrayCreate(count).
// NOTE: We don't set count since we push the values using append which
// would then append after count. Same for 9.
LibJS: Convert Array::create{,_from}() to NonnullGCPtr
2022-12-13 20:49:49 +00:00
auto template_ = MUST(Array::create(realm, 0));
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 9. Let rawObj be ! ArrayCreate(count).
LibJS: Convert Array::create{,_from}() to NonnullGCPtr
2022-12-13 20:49:49 +00:00
auto raw_obj = MUST(Array::create(realm, 0));
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 10. Let index be 0.
// 11. Repeat, while index < count,
for (size_t i = 0; i < count; ++i) {
auto cooked_string_index = i * 2;
// a. Let prop be ! ToString(𝔽(index)).
// b. Let cookedValue be cookedStrings[index].
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto cooked_value = TRY(expressions[cooked_string_index]->execute(interpreter)).release_value();
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// NOTE: If the string contains invalid escapes we get a null expression here,
// which we then convert to the expected `undefined` TV. See
// 12.9.6.1 Static Semantics: TV, https://tc39.es/ecma262/#sec-static-semantics-tv
if (cooked_value.is_null())
cooked_value = js_undefined();
// c. Perform ! DefinePropertyOrThrow(template, prop, PropertyDescriptor { [[Value]]: cookedValue, [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false }).
template_->indexed_properties().append(cooked_value);
// d. Let rawValue be the String value rawStrings[index].
// e. Perform ! DefinePropertyOrThrow(rawObj, prop, PropertyDescriptor { [[Value]]: rawValue, [[Writable]]: false, [[Enumerable]]: true, [[Configurable]]: false }).
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
raw_obj->indexed_properties().append(TRY(raw_strings[i]->execute(interpreter)).release_value());
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// f. Set index to index + 1.
}
// 12. Perform ! SetIntegrityLevel(rawObj, frozen).
MUST(raw_obj->set_integrity_level(Object::IntegrityLevel::Frozen));
// 13. Perform ! DefinePropertyOrThrow(template, "raw", PropertyDescriptor { [[Value]]: rawObj, [[Writable]]: false, [[Enumerable]]: false, [[Configurable]]: false }).
template_->define_direct_property(interpreter.vm().names.raw, raw_obj, 0);
// 14. Perform ! SetIntegrityLevel(template, frozen).
MUST(template_->set_integrity_level(Object::IntegrityLevel::Frozen));
// 15. Append the Record { [[Site]]: templateLiteral, [[Array]]: template } to templateRegistry.
LibJS: Add make_handle({Nonnull,}GCPtr<T>) overloads
2022-12-14 18:37:37 +00:00
m_cached_values.set(&realm, make_handle(template_));
LibJS: Implement tagged literals evaluation like the spec We cache on the AST node side as this is easier to track a position, we just have to take care to wrap the values in a handle to make sure they are not garbage collected.
2022-08-17 21:29:23 +02:00
// 16. Return template.
return template_;
}
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
void TryStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Block)");
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
block().dump(indent + 1);
if (handler()) {
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Handler)");
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
handler()->dump(indent + 1);
}
if (finalizer()) {
print_indent(indent);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Finalizer)");
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
finalizer()->dump(indent + 1);
}
}
void CatchClause::dump(int indent) const
{
print_indent(indent);
LibJS: Add support for binding patterns in catch clauses `try { ... } catch({a=foo}) {}` is valid, and now we parse and evaluate it correctly :^)
2021-07-11 15:15:38 +04:30
m_parameter.visit(
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
[&](DeprecatedFlyString const& parameter) {
LibJS: Add support for binding patterns in catch clauses `try { ... } catch({a=foo}) {}` is valid, and now we parse and evaluate it correctly :^)
2021-07-11 15:15:38 +04:30
if (parameter.is_null())
outln("CatchClause");
else
outln("CatchClause ({})", parameter);
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& pattern) {
LibJS: Add support for binding patterns in catch clauses `try { ... } catch({a=foo}) {}` is valid, and now we parse and evaluate it correctly :^)
2021-07-11 15:15:38 +04:30
outln("CatchClause");
print_indent(indent);
outln("(Parameter)");
pattern->dump(indent + 2);
});
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
body().dump(indent + 1);
}
LibJS: Implement "throw" You can now throw an expression to the nearest catcher! :^) To support throwing arbitrary values, I added an Exception class that sits as a wrapper around whatever is thrown. In the future it will be a logical place to store a call stack.
2020-03-24 22:03:50 +01:00
void ThrowStatement::dump(int indent) const
{
ASTNode::dump(indent);
argument().dump(indent + 1);
}
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
// 14.15.3 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-try-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion TryStatement::execute(Interpreter& interpreter) const
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
auto& vm = interpreter.vm();
LibJS: Create lexical scope for "catch" on the spot when throwing
2020-12-08 18:12:39 +01:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.15.2 Runtime Semantics: CatchClauseEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-catchclauseevaluation
auto catch_clause_evaluation = [&](Value thrown_value) {
// 1. Let oldEnv be the running execution context's LexicalEnvironment.
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto old_environment = vm.running_execution_context().lexical_environment;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 2. Let catchEnv be NewDeclarativeEnvironment(oldEnv).
LibJS: Convert new_declarative_environment() to NonnullGCPtr
2022-12-15 19:59:47 +00:00
auto catch_environment = new_declarative_environment(*old_environment);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
m_handler->parameter().visit(
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
[&](DeprecatedFlyString const& parameter) {
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 3. For each element argName of the BoundNames of CatchParameter, do
// a. Perform ! catchEnv.CreateMutableBinding(argName, false).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(catch_environment->create_mutable_binding(vm, parameter, false));
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& pattern) {
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 3. For each element argName of the BoundNames of CatchParameter, do
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_mutable_binding` below, an exception should not result from `for_each_bound_name`.
MUST(pattern->for_each_bound_name([&](auto& name) {
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// a. Perform ! catchEnv.CreateMutableBinding(argName, false).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(catch_environment->create_mutable_binding(vm, name, false));
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
});
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 4. Set the running execution context's LexicalEnvironment to catchEnv.
vm.running_execution_context().lexical_environment = catch_environment;
LibJS: Add support for binding patterns in catch clauses `try { ... } catch({a=foo}) {}` is valid, and now we parse and evaluate it correctly :^)
2021-07-11 15:15:38 +04:30
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Let status be Completion(BindingInitialization of CatchParameter with arguments thrownValue and catchEnv).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
auto status = m_handler->parameter().visit(
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
[&](DeprecatedFlyString const& parameter) {
LibJS: Add an initialize binding hint to all initialize_binding methods This will allow us to specify things like SyncDispose and perhaps AsyncDispose in the future.
2022-12-14 13:26:10 +01:00
return catch_environment->initialize_binding(vm, parameter, thrown_value, Environment::InitializeBindingHint::Normal);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
},
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
[&](NonnullRefPtr<BindingPattern const> const& pattern) {
LibJS: Replace GlobalObject with VM in remaining AOs [Part 19/19]
2022-08-21 20:38:35 +01:00
return vm.binding_initialization(pattern, thrown_value, catch_environment);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
});
// 6. If status is an abrupt completion, then
if (status.is_error()) {
// a. Set the running execution context's LexicalEnvironment to oldEnv.
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// b. Return ? status.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return status.release_error();
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 7. Let B be the result of evaluating Block.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto handler_result = m_handler->body().execute(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 8. Set the running execution context's LexicalEnvironment to oldEnv.
vm.running_execution_context().lexical_environment = old_environment;
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 9. Return ? B.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return handler_result;
};
Completion result;
// 1. Let B be the result of evaluating Block.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto block_result = m_block->execute(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// TryStatement : try Block Catch
// TryStatement : try Block Catch Finally
if (m_handler) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. If B.[[Type]] is throw, let C be Completion(CatchClauseEvaluation of Catch with argument B.[[Value]]).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (block_result.type() == Completion::Type::Throw)
result = catch_clause_evaluation(*block_result.value());
// 3. Else, let C be B.
else
result = move(block_result);
} else {
// TryStatement : try Block Finally
// This variant doesn't have C & uses B in the finalizer step.
result = move(block_result);
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// TryStatement : try Block Finally
// TryStatement : try Block Catch Finally
LibJS: Stop unwinding and reset exception for TryStatement finalizer This fixes two issues with running a TryStatement finalizer: - Temporarily store and clear the exception, if any, so we can run the finalizer block statement without it getting in our way, which could have unexpected side effects otherwise (and will likely return early somewhere). - Stop unwinding so more than one child node of the finalizer BlockStatement is executed if an exception has been thrown previously (which would have called unwind(ScopeType::Try)). Re-throwing as described above ensures we still unwind after the finalizer, if necessary. Also add some tests specifically for try/catch/finally blocks, we didn't have any!
2020-09-11 23:30:00 +01:00
if (m_finalizer) {
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 4. Let F be the result of evaluating Finally.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto finalizer_result = m_finalizer->execute(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 5. If F.[[Type]] is normal, set F to C.
if (finalizer_result.type() == Completion::Type::Normal)
finalizer_result = move(result);
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 6. Return ? UpdateEmpty(F, undefined).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return finalizer_result.update_empty(js_undefined());
LibJS: Stop unwinding and reset exception for TryStatement finalizer This fixes two issues with running a TryStatement finalizer: - Temporarily store and clear the exception, if any, so we can run the finalizer block statement without it getting in our way, which could have unexpected side effects otherwise (and will likely return early somewhere). - Stop unwinding so more than one child node of the finalizer BlockStatement is executed if an exception has been thrown previously (which would have called unwind(ScopeType::Try)). Re-throwing as described above ensures we still unwind after the finalizer, if necessary. Also add some tests specifically for try/catch/finally blocks, we didn't have any!
2020-09-11 23:30:00 +01:00
}
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 4. Return ? UpdateEmpty(C, undefined).
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return result.update_empty(js_undefined());
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion CatchClause::execute(Interpreter& interpreter) const
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Implement basic exception throwing You can now throw exceptions by calling Interpreter::throw_exception(). Anyone who calls ASTNode::execute() needs to check afterwards if the Interpreter now has an exception(), and if so, stop what they're doing and simply return. When catching an exception, we'll first execute the CatchClause node if present. After that, we'll execute the finalizer block if present. This is unlikely to be completely correct, but it's a start! :^)
2020-03-24 14:37:39 +01:00
// NOTE: CatchClause execution is handled by TryStatement.
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Parse "try", "catch" and "finally" This is the first step towards support exceptions. :^)
2020-03-24 14:03:55 +01:00
return {};
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.14.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-throw-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ThrowStatement::execute(Interpreter& interpreter) const
LibJS: Implement "throw" You can now throw an expression to the nearest catcher! :^) To support throwing arbitrary values, I added an Exception class that sits as a wrapper around whatever is thrown. In the future it will be a logical place to store a call stack.
2020-03-24 22:03:50 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let exprRef be the result of evaluating Expression.
// 2. Let exprValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(m_argument->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. Return ThrowCompletion(exprValue).
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return throw_completion(value);
LibJS: Implement "throw" You can now throw an expression to the nearest catcher! :^) To support throwing arbitrary values, I added an Exception class that sits as a wrapper around whatever is thrown. In the future it will be a logical place to store a call stack.
2020-03-24 22:03:50 +01:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.1.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-statement-semantics-runtime-semantics-evaluation
// BreakableStatement : SwitchStatement
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SwitchStatement::execute(Interpreter& interpreter) const
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
{
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 1. Let newLabelSet be a new empty List.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Return ? LabelledEvaluation of this BreakableStatement with argument newLabelSet.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return labelled_evaluation(interpreter, *this, {});
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
}
LibJS: Defer execution of switch default clause until after case clauses When we encounter a default clause in a switch statement, we should not execute it immediately, instead we need to wait until all case clauses have been executed as a matching case clause can break from the switch/case. The code is nowhere close to the spec, so instead of fixing it properly I just made it slightly worse, but correct. Needs a complete refactor at some point.
2021-09-26 16:28:50 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// NOTE: Since we don't have the 'BreakableStatement' from the spec as a separate ASTNode that wraps IterationStatement / SwitchStatement,
// execute() needs to take care of LabelledEvaluation, which in turn calls execute_impl().
// 14.12.4 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-switch-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SwitchStatement::execute_impl(Interpreter& interpreter) const
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
auto& vm = interpreter.vm();
LibJS: Implement basic execution of "switch" statements The "break" keyword now unwinds to the nearest ScopeType::Breakable. There's no support for break labels yet, but we'll get there too.
2020-03-29 14:34:25 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 14.12.3 CaseClauseIsSelected ( C, input ), https://tc39.es/ecma262/#sec-runtime-semantics-caseclauseisselected
auto case_clause_is_selected = [&](auto const& case_clause, auto input) -> ThrowCompletionOr<bool> {
// 1. Assert: C is an instance of the production CaseClause : case Expression : StatementList[opt] .
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
VERIFY(case_clause->test());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 2. Let exprRef be the result of evaluating the Expression of C.
// 3. Let clauseSelector be ? GetValue(exprRef).
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto clause_selector = TRY(case_clause->test()->execute(interpreter)).release_value();
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 4. Return IsStrictlyEqual(input, clauseSelector).
return is_strictly_equal(input, clause_selector);
};
// 14.12.2 Runtime Semantics: CaseBlockEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-caseblockevaluation
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
auto case_block_evaluation = [&](auto input) -> Completion {
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// CaseBlock : { }
if (m_cases.is_empty()) {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return undefined.
return js_undefined();
LibJS: Fix switch skipping case evaluation when hitting the default case When no case match we should not just execute the statements of the default case but also of any cases below the default case.
2021-09-29 15:51:30 +02:00
}
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
Vector<NonnullRefPtr<SwitchCase const>> case_clauses_1;
Vector<NonnullRefPtr<SwitchCase const>> case_clauses_2;
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
RefPtr<SwitchCase const> default_clause;
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
for (auto const& switch_case : m_cases) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
if (!switch_case->test())
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
default_clause = switch_case;
else if (!default_clause)
case_clauses_1.append(switch_case);
else
case_clauses_2.append(switch_case);
}
// CaseBlock : { CaseClauses }
if (!default_clause) {
VERIFY(!case_clauses_1.is_empty());
VERIFY(case_clauses_2.is_empty());
// 1. Let V be undefined.
auto last_value = js_undefined();
// 2. Let A be the List of CaseClause items in CaseClauses, in source text order.
// NOTE: A is case_clauses_1.
// 3. Let found be false.
auto found = false;
// 4. For each CaseClause C of A, do
for (auto const& case_clause : case_clauses_1) {
// a. If found is false, then
if (!found) {
// i. Set found to ? CaseClauseIsSelected(C, input).
found = TRY(case_clause_is_selected(case_clause, input));
}
// b. If found is true, then
if (found) {
// i. Let R be the result of evaluating C.
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto result = case_clause->evaluate_statements(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// ii. If R.[[Value]] is not empty, set V to R.[[Value]].
if (result.value().has_value())
last_value = *result.value();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// iii. If R is an abrupt completion, return ? UpdateEmpty(R, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (result.is_abrupt())
return result.update_empty(last_value);
}
LibJS: Fix switch skipping case evaluation when hitting the default case When no case match we should not just execute the statements of the default case but also of any cases below the default case.
2021-09-29 15:51:30 +02:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return V.
return last_value;
LibJS: Fix switch skipping case evaluation when hitting the default case When no case match we should not just execute the statements of the default case but also of any cases below the default case.
2021-09-29 15:51:30 +02:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// CaseBlock : { CaseClauses[opt] DefaultClause CaseClauses[opt] }
else {
// 1. Let V be undefined.
auto last_value = js_undefined();
// 2. If the first CaseClauses is present, then
// a. Let A be the List of CaseClause items in the first CaseClauses, in source text order.
// 3. Else,
LibJS: Use more consistent wording for creating empty lists This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/0bf22a9
2022-05-03 21:20:21 +02:00
// a. Let A be a new empty List.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// NOTE: A is case_clauses_1.
// 4. Let found be false.
auto found = false;
// 5. For each CaseClause C of A, do
for (auto const& case_clause : case_clauses_1) {
// a. If found is false, then
if (!found) {
// i. Set found to ? CaseClauseIsSelected(C, input).
found = TRY(case_clause_is_selected(case_clause, input));
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// b. If found is true, then
if (found) {
// i. Let R be the result of evaluating C.
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto result = case_clause->evaluate_statements(interpreter);
LibJS: Implement basic execution of "switch" statements The "break" keyword now unwinds to the nearest ScopeType::Breakable. There's no support for break labels yet, but we'll get there too.
2020-03-29 14:34:25 +02:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// ii. If R.[[Value]] is not empty, set V to R.[[Value]].
if (result.value().has_value())
last_value = *result.value();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// iii. If R is an abrupt completion, return ? UpdateEmpty(R, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (result.is_abrupt())
return result.update_empty(last_value);
}
}
// 6. Let foundInB be false.
auto found_in_b = false;
// 7. If the second CaseClauses is present, then
// a. Let B be the List of CaseClause items in the second CaseClauses, in source text order.
// 8. Else,
LibJS: Use more consistent wording for creating empty lists This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/0bf22a9
2022-05-03 21:20:21 +02:00
// a. Let B be a new empty List.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// NOTE: B is case_clauses_2.
// 9. If found is false, then
if (!found) {
// a. For each CaseClause C of B, do
for (auto const& case_clause : case_clauses_2) {
// i. If foundInB is false, then
if (!found_in_b) {
// 1. Set foundInB to ? CaseClauseIsSelected(C, input).
found_in_b = TRY(case_clause_is_selected(case_clause, input));
}
// ii. If foundInB is true, then
if (found_in_b) {
// 1. Let R be the result of evaluating CaseClause C.
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
auto result = case_clause->evaluate_statements(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 2. If R.[[Value]] is not empty, set V to R.[[Value]].
if (result.value().has_value())
last_value = *result.value();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 3. If R is an abrupt completion, return ? UpdateEmpty(R, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (result.is_abrupt())
return result.update_empty(last_value);
}
LibJS: Make "break" actually work inside "switch"
2020-04-05 00:09:48 +02:00
}
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 10. If foundInB is true, return V.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (found_in_b)
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
return last_value;
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 11. Let R be the result of evaluating DefaultClause.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto result = default_clause->evaluate_statements(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 12. If R.[[Value]] is not empty, set V to R.[[Value]].
if (result.value().has_value())
last_value = *result.value();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 13. If R is an abrupt completion, return ? UpdateEmpty(R, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (result.is_abrupt())
return result.update_empty(last_value);
// 14. NOTE: The following is another complete iteration of the second CaseClauses.
// 15. For each CaseClause C of B, do
for (auto const& case_clause : case_clauses_2) {
// a. Let R be the result of evaluating CaseClause C.
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
result = case_clause->evaluate_statements(interpreter);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// b. If R.[[Value]] is not empty, set V to R.[[Value]].
if (result.value().has_value())
last_value = *result.value();
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// c. If R is an abrupt completion, return ? UpdateEmpty(R, V).
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
if (result.is_abrupt())
return result.update_empty(last_value);
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 16. Return V.
return last_value;
LibJS: Implement basic execution of "switch" statements The "break" keyword now unwinds to the nearest ScopeType::Breakable. There's no support for break labels yet, but we'll get there too.
2020-03-29 14:34:25 +02:00
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
VERIFY_NOT_REACHED();
};
// SwitchStatement : switch ( Expression ) CaseBlock
// 1. Let exprRef be the result of evaluating Expression.
// 2. Let switchValue be ? GetValue(exprRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto switch_value = TRY(m_discriminant->execute(interpreter)).release_value();
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
Completion result;
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// Optimization: Avoid creating a lexical environment if there are no lexical declarations.
if (has_lexical_declarations()) {
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 3. Let oldEnv be the running execution context's LexicalEnvironment.
auto* old_environment = interpreter.lexical_environment();
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 4. Let blockEnv be NewDeclarativeEnvironment(oldEnv).
LibJS: Convert new_declarative_environment() to NonnullGCPtr
2022-12-15 19:59:47 +00:00
auto block_environment = new_declarative_environment(*old_environment);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 5. Perform BlockDeclarationInstantiation(CaseBlock, blockEnv).
LibJS: Make BlockDeclarationInstantiation take a VM& There's no need for this to require an AST Interpreter.
2023-06-16 16:12:11 +02:00
block_declaration_instantiation(vm, block_environment);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// 6. Set the running execution context's LexicalEnvironment to blockEnv.
vm.running_execution_context().lexical_environment = block_environment;
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 7. Let R be Completion(CaseBlockEvaluation of CaseBlock with argument switchValue).
result = case_block_evaluation(switch_value);
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 8. Let env be blockEnv's LexicalEnvironment.
// FIXME: blockEnv doesn't have a lexical env it is one?? Probably a spec issue
// 9. Set R to DisposeResources(env, R).
result = dispose_resources(vm, block_environment, result);
// 10. Set the running execution context's LexicalEnvironment to oldEnv.
vm.running_execution_context().lexical_environment = old_environment;
} else {
result = case_block_evaluation(switch_value);
}
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
LibJS: Add using declaration support, RAII like operation in js In this patch only top level and not the more complicated for loop using statements are supported. Also, as noted in the latest meeting of tc39 async parts of the spec are not stage 3 thus not included.
2022-12-20 22:09:57 +01:00
// 11. Return R.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return result;
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
}
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SwitchCase::execute(Interpreter& interpreter) const
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Handle return value in switch statement unwinding Fixes #3790.
2020-10-18 17:44:55 +01:00
// NOTE: SwitchCase execution is handled by SwitchStatement.
Everywhere: Rename ASSERT => VERIFY (...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
2021-02-23 20:42:32 +01:00
VERIFY_NOT_REACHED();
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
return {};
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.9.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-break-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion BreakStatement::execute(Interpreter& interpreter) const
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// BreakStatement : break ;
if (m_target_label.is_null()) {
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 1. Return Completion Record { [[Type]]: break, [[Value]]: empty, [[Target]]: empty }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Break, {}, {} };
}
// BreakStatement : break LabelIdentifier ;
// 1. Let label be the StringValue of LabelIdentifier.
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 2. Return Completion Record { [[Type]]: break, [[Value]]: empty, [[Target]]: label }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Break, {}, m_target_label };
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.8.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-continue-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ContinueStatement::execute(Interpreter& interpreter) const
LibJS: Add support for "continue" inside "for" statements :^)
2020-04-05 00:22:42 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
// ContinueStatement : continue ;
if (m_target_label.is_null()) {
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 1. Return Completion Record { [[Type]]: continue, [[Value]]: empty, [[Target]]: empty }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Continue, {}, {} };
}
// ContinueStatement : continue LabelIdentifier ;
// 1. Let label be the StringValue of LabelIdentifier.
LibJS: Change "Completion {}" to "Completion Record {}" in comments This is an editorial change in the ECMA-262 spec. See: https://github.com/tc39/ecma262/commit/15a7d8a
2022-05-01 01:24:05 +02:00
// 2. Return Completion Record { [[Type]]: continue, [[Value]]: empty, [[Target]]: label }.
LibJS: Replace the custom unwind mechanism with completions :^) This includes: - Parsing proper LabelledStatements with try_parse_labelled_statement() - Removing LabelableStatement - Implementing the LoopEvaluation semantics via loop_evaluation() in each IterationStatement subclass; and IterationStatement evaluation via {For,ForIn,ForOf,ForAwaitOf,While,DoWhile}Statement::execute() - Updating ReturnStatement, BreakStatement and ContinueStatement to return the appropriate completion types - Basically reimplementing TryStatement and SwitchStatement according to the spec, using completions - Honoring result completion types in AsyncBlockStart and OrdinaryCallEvaluateBody - Removing any uses of the VM unwind mechanism - most importantly, VM::throw_exception() now exclusively sets an exception and no longer triggers any unwinding mechanism. However, we already did a good job updating all of LibWeb and userland applications to not use it, and the few remaining uses elsewhere don't rely on unwinding AFAICT.
2022-01-05 19:11:16 +01:00
return { Completion::Type::Continue, {}, m_target_label };
LibJS: Add support for "continue" inside "for" statements :^)
2020-04-05 00:22:42 +02:00
}
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
void SwitchStatement::dump(int indent) const
{
ASTNode::dump(indent);
m_discriminant->dump(indent + 1);
for (auto& switch_case : m_cases) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
switch_case->dump(indent + 1);
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
}
}
void SwitchCase::dump(int indent) const
{
LibJS: Add indentation to sections in SwitchCase::dump() This now matches the output of Program (Variables) ... (Children) ... or FunctionDeclaration 'foo' (Parameters) ... (Body) ... etc. Also don't print each consequent statement index, it doesn't add any value.
2020-05-04 19:01:24 +01:00
print_indent(indent + 1);
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
if (m_test) {
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Test)");
LibJS: Add indentation to sections in SwitchCase::dump() This now matches the output of Program (Variables) ... (Children) ... or FunctionDeclaration 'foo' (Parameters) ... (Body) ... etc. Also don't print each consequent statement index, it doesn't add any value.
2020-05-04 19:01:24 +01:00
m_test->dump(indent + 2);
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
} else {
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Default)");
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
}
LibJS: Add indentation to sections in SwitchCase::dump() This now matches the output of Program (Variables) ... (Children) ... or FunctionDeclaration 'foo' (Parameters) ... (Body) ... etc. Also don't print each consequent statement index, it doesn't add any value.
2020-05-04 19:01:24 +01:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Consequent)");
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
ScopeNode::dump(indent + 2);
LibJS: Lexer and parser support for "switch" statements
2020-03-29 13:09:54 +02:00
}
LibJS: Implement constructor/non-constructor function calls This adds Function::construct() for constructor function calls via `new` keyword. NativeFunction doesn't have constructor behaviour by default, ScriptFunction simply calls call() in construct()
2020-04-01 18:31:24 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.14.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-conditional-operator-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ConditionalExpression::execute(Interpreter& interpreter) const
LibJS: Implement ConditionalExpression (ternary "?:" operator)
2020-04-03 12:14:28 +02:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 1. Let lref be the result of evaluating ShortCircuitExpression.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 2. Let lval be ToBoolean(? GetValue(lref)).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto test_result = TRY(m_test->execute(interpreter)).release_value();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 3. If lval is true, then
LibJS: Implement ConditionalExpression (ternary "?:" operator)
2020-04-03 12:14:28 +02:00
if (test_result.to_boolean()) {
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// a. Let trueRef be the result of evaluating the first AssignmentExpression.
// b. Return ? GetValue(trueRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_consequent->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 4. Else,
else {
// a. Let falseRef be the result of evaluating the second AssignmentExpression.
// b. Return ? GetValue(falseRef).
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_alternate->execute(interpreter);
LibJS: Implement ConditionalExpression (ternary "?:" operator)
2020-04-03 12:14:28 +02:00
}
}
void ConditionalExpression::dump(int indent) const
{
ASTNode::dump(indent);
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Test)");
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
m_test->dump(indent + 2);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Consequent)");
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
m_consequent->dump(indent + 2);
print_indent(indent + 1);
LibJS: Use new format functions everywhere This changes the remaining uses of the following functions across LibJS: - String::format() => String::formatted() - dbg() => dbgln() - printf() => out(), outln() - fprintf() => warnln() I also removed the relevant 'LogStream& operator<<' overloads as they're not needed anymore.
2020-12-06 16:55:19 +00:00
outln("(Alternate)");
LibJS: Add template literals Adds fully functioning template literals. Because template literals contain expressions, most of the work has to be done in the Lexer rather than the Parser. And because of the complexity of template literals (expressions, nesting, escapes, etc), the Lexer needs to have some template-related state. When entering a new template literal, a TemplateLiteralStart token is emitted. When inside a literal, all text will be parsed up until a '${' or '`' (or EOF, but that's a syntax error) is seen, and then a TemplateLiteralExprStart token is emitted. At this point, the Lexer proceeds as normal, however it keeps track of the number of opening and closing curly braces it has seen in order to determine the close of the expression. Once it finds a matching curly brace for the '${', a TemplateLiteralExprEnd token is emitted and the state is updated accordingly. When the Lexer is inside of a template literal, but not an expression, and sees a '`', this must be the closing grave: a TemplateLiteralEnd token is emitted. The state required to correctly parse template strings consists of a vector (for nesting) of two pieces of information: whether or not we are in a template expression (as opposed to a template string); and the count of the number of unmatched open curly braces we have seen (only applicable if the Lexer is currently in a template expression). TODO: Add support for template literal newlines in the JS REPL (this will cause a syntax error currently): > `foo > bar` 'foo bar'
2020-05-03 15:41:14 -07:00
m_alternate->dump(indent + 2);
LibJS: Implement ConditionalExpression (ternary "?:" operator)
2020-04-03 12:14:28 +02:00
}
LibJS: Add SequenceExpression AST node (comma operator) This patch only adds the AST node, the parser doesn't create them yet.
2020-04-07 15:11:05 +02:00
void SequenceExpression::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& expression : m_expressions)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
expression->dump(indent + 1);
LibJS: Add SequenceExpression AST node (comma operator) This patch only adds the AST node, the parser doesn't create them yet.
2020-04-07 15:11:05 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 13.16.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-comma-operator-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion SequenceExpression::execute(Interpreter& interpreter) const
LibJS: Add SequenceExpression AST node (comma operator) This patch only adds the AST node, the parser doesn't create them yet.
2020-04-07 15:11:05 +02:00
{
LibJS: Don't track executing AST nodes in a Vector Instead just link together the InterpreterNodeScopes in a linked list. This was surprisingly hot on CanvasCycle.
2021-03-21 17:38:42 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Track source positions all the way down to exceptions This makes exceptions have a trace of source positions too, which could probably be helpful in making fancier error tracebacks.
2020-12-28 20:45:22 +03:30
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// NOTE: Not sure why the last node is an AssignmentExpression in the spec :yakfused:
// 1. Let lref be the result of evaluating Expression.
// 2. Perform ? GetValue(lref).
// 3. Let rref be the result of evaluating AssignmentExpression.
// 4. Return ? GetValue(rref).
LibJS: Add SequenceExpression AST node (comma operator) This patch only adds the AST node, the parser doesn't create them yet.
2020-04-07 15:11:05 +02:00
Value last_value;
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
for (auto const& expression : m_expressions)
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
last_value = TRY(expression->execute(interpreter)).release_value();
LibJS: Update AST to use completions :^) This is another major milestone on our journey towards removing global VM exception state :^) Does pretty much exactly what it says on the tin: updating ASTNode::execute() to return a Completion instead of a plain value. This will *also* allow us to eventually remove the non-standard unwinding mechanism and purely rely on the various completion types.
2022-01-02 21:37:50 +01:00
return { move(last_value) };
LibJS: Add SequenceExpression AST node (comma operator) This patch only adds the AST node, the parser doesn't create them yet.
2020-04-07 15:11:05 +02:00
}
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 14.16.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-debugger-statement-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion DebuggerStatement::execute(Interpreter& interpreter) const
LibJS: Implement (no-op) debugger statement
2020-04-30 17:26:27 +01:00
{
LibJS: Make an RAII helper for entering/exiting AST nodes
2021-03-16 10:51:55 +01:00
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
Completion result;
// 1. If an implementation-defined debugging facility is available and enabled, then
if (false) {
// a. Perform an implementation-defined debugging action.
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
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// b. Return a new implementation-defined Completion Record.
LibJS: Make AST.cpp compile with -O0
2022-07-06 14:12:51 +02:00
VERIFY_NOT_REACHED();
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
// 2. Else,
else {
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// a. Return empty.
return Optional<Value> {};
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
LibJS: Implement (no-op) debugger statement
2020-04-30 17:26:27 +01:00
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
ThrowCompletionOr<void> ScopeNode::for_each_lexically_scoped_declaration(ThrowCompletionOrVoidCallback<Declaration const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
for (auto& declaration : m_lexical_declarations)
TRY(callback(declaration));
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> ScopeNode::for_each_lexically_declared_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
for (auto const& declaration : m_lexical_declarations) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(declaration->for_each_bound_name([&](auto const& name) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return callback(name);
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ThrowCompletionOr<void> ScopeNode::for_each_var_declared_name(ThrowCompletionOrVoidCallback<DeprecatedFlyString const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
for (auto& declaration : m_var_declarations) {
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(declaration->for_each_bound_name([&](auto const& name) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return callback(name);
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Add ScopeNode::for_each_var_declared_identifier() The same as for_each_var_declared_name but for identifiers.
2023-07-05 02:10:40 +02:00
ThrowCompletionOr<void> ScopeNode::for_each_var_declared_identifier(ThrowCompletionOrVoidCallback<Identifier const&>&& callback) const
{
for (auto& declaration : m_var_declarations) {
TRY(declaration->for_each_bound_identifier([&](auto const& id) {
return callback(id);
}));
}
return {};
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
ThrowCompletionOr<void> ScopeNode::for_each_var_function_declaration_in_reverse_order(ThrowCompletionOrVoidCallback<FunctionDeclaration const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
for (ssize_t i = m_var_declarations.size() - 1; i >= 0; i--) {
auto& declaration = m_var_declarations[i];
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
if (is<FunctionDeclaration>(declaration))
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(callback(static_cast<FunctionDeclaration const&>(*declaration)));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Update parser to detect if identifier refer a "local" variable This modification enables the parser to determine whether an identifier used within a function refers to a local variable or not. In this context, a local identifier means that it is not captured by any nested function declaration which means it modified only from inside a function. The information about whether identifier is local is stored inside Identifier AST node and also contains information about the index of local variable inside a function and information about total number of local variables used by a function is stored in function nodes.
2023-07-05 00:14:41 +02:00
ThrowCompletionOr<void> ScopeNode::for_each_lexical_function_declaration_in_reverse_order(ThrowCompletionOrVoidCallback<FunctionDeclaration const&>&& callback) const
{
for (ssize_t i = m_lexical_declarations.size() - 1; i >= 0; i--) {
auto& declaration = m_lexical_declarations[i];
if (is<FunctionDeclaration>(declaration))
TRY(callback(static_cast<FunctionDeclaration const&>(*declaration)));
}
return {};
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
ThrowCompletionOr<void> ScopeNode::for_each_var_scoped_variable_declaration(ThrowCompletionOrVoidCallback<VariableDeclaration const&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
for (auto& declaration : m_var_declarations) {
if (!is<FunctionDeclaration>(declaration)) {
VERIFY(is<VariableDeclaration>(declaration));
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(callback(static_cast<VariableDeclaration const&>(*declaration)));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
ThrowCompletionOr<void> ScopeNode::for_each_function_hoistable_with_annexB_extension(ThrowCompletionOrVoidCallback<FunctionDeclaration&>&& callback) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
for (auto& function : m_functions_hoistable_with_annexB_extension) {
// We need const_cast here since it might have to set a property on function declaration.
Everywhere: Stop using NonnullRefPtrVector This class had slightly confusing semantics and the added weirdness doesn't seem worth it just so we can say "." instead of "->" when iterating over a vector of NNRPs. This patch replaces NonnullRefPtrVector<T> with Vector<NNRP<T>>.
2023-03-06 14:17:01 +01:00
TRY(callback(const_cast<FunctionDeclaration&>(*function)));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
void ScopeNode::add_lexical_declaration(NonnullRefPtr<Declaration const> declaration)
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
{
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
m_lexical_declarations.append(move(declaration));
LibJS: Hoist variable declarations to the nearest relevant scope "var" declarations are hoisted to the nearest function scope, while "let" and "const" are hoisted to the nearest block scope. This is done by the parser, which keeps two scope stacks, one stack for the current var scope and one for the current let/const scope. When the interpreter enters a scope, we walk all of the declarations and insert them into the variable environment. We don't support the temporal dead zone for let/const yet.
2020-04-13 16:42:54 +02:00
}
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
void ScopeNode::add_var_scoped_declaration(NonnullRefPtr<Declaration const> declaration)
LibJS: Hoist function declarations This patch adds function declaration hoisting. The mechanism is similar to var hoisting. Hoisted function declarations are to be put before the hoisted var declarations, hence they have to be treated separately.
2020-06-04 14:48:36 +02:00
{
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
m_var_declarations.append(move(declaration));
LibJS: Hoist function declarations This patch adds function declaration hoisting. The mechanism is similar to var hoisting. Hoisted function declarations are to be put before the hoisted var declarations, hence they have to be treated separately.
2020-06-04 14:48:36 +02:00
}
LibJS: Make RefPtr and NonnullRefPtr usage const-correct This mainly affected the AST, which is now const throughout.
2023-02-19 22:07:52 +01:00
void ScopeNode::add_hoisted_function(NonnullRefPtr<FunctionDeclaration const> declaration)
LibJS: Improve function hoisting across blocks The parser now keeps track of a scope chain so that it can hoist function declarations to the closest function scope.
2021-07-04 03:15:52 +02:00
{
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
m_functions_hoistable_with_annexB_extension.append(move(declaration));
LibJS: Improve function hoisting across blocks The parser now keeps track of a scope chain so that it can hoist function declarations to the closest function scope.
2021-07-04 03:15:52 +02:00
}
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 16.2.1.11 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-module-semantics-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ImportStatement::execute(Interpreter& interpreter) const
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return empty.
return Optional<Value> {};
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
DeprecatedFlyString ExportStatement::local_name_for_default = "*default*";
LibJS: Make parsing import and export entries follow the spec The big changes are: - Allow strings as Module{Export, Import}Name - Properly track declarations in default export statements However, the spec is a little strange in that it allows function and class declarations without a name in default export statements. This is quite hard to fully implement without rewriting more of the parser so for now this behavior is emulated by faking things with function and class expressions. See the comments in parse_export_statement for details on the hacks and where it goes wrong.
2022-01-16 23:51:28 +01:00
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
// 16.2.3.7 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-exports-runtime-semantics-evaluation
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
Completion ExportStatement::execute(Interpreter& interpreter) const
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
{
InterpreterNodeScope node_scope { interpreter, *this };
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto& vm = interpreter.vm();
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
if (!is_default_export()) {
if (m_statement) {
// 1. Return the result of evaluating <Thing>.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_statement->execute(interpreter);
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 1. Return empty.
return Optional<Value> {};
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
}
VERIFY(m_statement);
// ExportDeclaration : export default HoistableDeclaration
if (is<FunctionDeclaration>(*m_statement)) {
// 1. Return the result of evaluating HoistableDeclaration.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
return m_statement->execute(interpreter);
LibJS: Add a ton of spec comments to AST.cpp
2022-01-02 21:49:02 +01:00
}
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
// ExportDeclaration : export default ClassDeclaration
// ClassDeclaration: class BindingIdentifier[?Yield, ?Await] ClassTail[?Yield, ?Await]
if (is<ClassDeclaration>(*m_statement)) {
auto const& class_declaration = static_cast<ClassDeclaration const&>(*m_statement);
// 1. Let value be ? BindingClassDeclarationEvaluation of ClassDeclaration.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(binding_class_declaration_evaluation(interpreter, class_declaration.m_class_expression));
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
// 2. Let className be the sole element of BoundNames of ClassDeclaration.
// 3. If className is "*default*", then
// Note: We never go into step 3. since a ClassDeclaration always has a name and "*default*" is not a class name.
(void)value;
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 4. Return empty.
return Optional<Value> {};
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
}
// ExportDeclaration : export default ClassDeclaration
// ClassDeclaration: [+Default] class ClassTail [?Yield, ?Await]
if (is<ClassExpression>(*m_statement)) {
auto& class_expression = static_cast<ClassExpression const&>(*m_statement);
// 1. Let value be ? BindingClassDeclarationEvaluation of ClassDeclaration.
LibJS: Remove GlobalObject from execute() and related AST functions This is a continuation of the previous four commits. Passing a global object here is largely redundant, we definitely need the interpreter but can get the VM and (later) current active realm from there - and also the global object while we still need it, although I'd like to remove Interpreter::global_object() in the future. This now matches the bytecode interpreter's execute_impl() functions.
2022-08-16 19:28:17 +01:00
auto value = TRY(binding_class_declaration_evaluation(interpreter, class_expression));
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
// 2. Let className be the sole element of BoundNames of ClassDeclaration.
// 3. If className is "*default*", then
if (!class_expression.has_name()) {
// Note: This can only occur if the class does not have a name since "*default*" is normally not valid.
// a. Let env be the running execution context's LexicalEnvironment.
auto* env = interpreter.lexical_environment();
// b. Perform ? InitializeBoundName("*default*", value, env).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
TRY(initialize_bound_name(vm, ExportStatement::local_name_for_default, value, env));
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
}
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 4. Return empty.
return Optional<Value> {};
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
}
// ExportDeclaration : export default AssignmentExpression ;
// 1. If IsAnonymousFunctionDefinition(AssignmentExpression) is true, then
// a. Let value be ? NamedEvaluation of AssignmentExpression with argument "default".
// 2. Else,
// a. Let rhs be the result of evaluating AssignmentExpression.
// b. Let value be ? GetValue(rhs).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
auto value = TRY(vm.named_evaluation_if_anonymous_function(*m_statement, "default"));
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
// 3. Let env be the running execution context's LexicalEnvironment.
auto* env = interpreter.lexical_environment();
// 4. Perform ? InitializeBoundName("*default*", value, env).
LibJS: Replace GlobalObject with VM in common AOs [Part 18/19]
2022-08-21 19:24:32 +01:00
TRY(initialize_bound_name(vm, ExportStatement::local_name_for_default, value, env));
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 5. Return empty.
return Optional<Value> {};
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
}
LibJS: Parse assert clauses of in- and export statements Based on proposal: https://tc39.es/proposal-import-assertions Since imports are not supported yet this is not functional.
2021-12-20 15:29:25 +01:00
static void dump_assert_clauses(ModuleRequest const& request)
{
if (!request.assertions.is_empty()) {
out("[ ");
for (auto& assertion : request.assertions)
out("{}: {}, ", assertion.key, assertion.value);
out(" ]");
}
}
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
void ExportStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("(ExportEntries)");
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
auto string_or_null = [](DeprecatedString const& string) -> DeprecatedString {
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
if (string.is_empty()) {
return "null";
}
AK+Everywhere: Rename String to DeprecatedString We have a new, improved string type coming up in AK (OOM aware, no null state), and while it's going to use UTF-8, the name UTF8String is a mouthful - so let's free up the String name by renaming the existing class. Making the old one have an annoying name will hopefully also help with quick adoption :^)
2022-12-04 18:02:33 +00:00
return DeprecatedString::formatted("\"{}\"", string);
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
};
for (auto& entry : m_entries) {
print_indent(indent + 2);
LibJS: Follow the spec with storing im- and export entries Because we can have arbitrary in- and export names with strings we can have '*' and '' which means using '*' as an indicating namespace imports failed / behaved incorrectly for string imports '*'. We now use more specific types to indicate these special states instead of these 'magic' string values. Do note that 'default' is not actually a magic string value but one specified by the spec. And you can in fact export the default value by doing: `export { 1 as default }`.
2022-01-27 01:54:47 +01:00
out("ExportName: {}, ImportName: {}, LocalName: {}, ModuleRequest: ",
string_or_null(entry.export_name),
entry.is_module_request() ? string_or_null(entry.local_or_import_name) : "null",
entry.is_module_request() ? "null" : string_or_null(entry.local_or_import_name));
if (entry.is_module_request()) {
out("{}", entry.m_module_request->module_specifier);
dump_assert_clauses(*entry.m_module_request);
outln();
} else {
outln("null");
}
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
}
LibJS: Implement evaluation of im- and exports statements
2022-01-18 19:07:13 +01:00
if (m_statement) {
print_indent(indent + 1);
outln("(Statement)");
m_statement->dump(indent + 2);
}
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
}
void ImportStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
if (m_entries.is_empty()) {
// direct from "module" import
LibJS: Parse assert clauses of in- and export statements Based on proposal: https://tc39.es/proposal-import-assertions Since imports are not supported yet this is not functional.
2021-12-20 15:29:25 +01:00
outln("Entire module '{}'", m_module_request.module_specifier);
dump_assert_clauses(m_module_request);
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
} else {
LibJS: Parse assert clauses of in- and export statements Based on proposal: https://tc39.es/proposal-import-assertions Since imports are not supported yet this is not functional.
2021-12-20 15:29:25 +01:00
outln("(ExportEntries) from {}", m_module_request.module_specifier);
dump_assert_clauses(m_module_request);
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
for (auto& entry : m_entries) {
print_indent(indent + 2);
outln("ImportName: {}, LocalName: {}", entry.import_name, entry.local_name);
}
}
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
bool ExportStatement::has_export(DeprecatedFlyString const& export_name) const
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
{
return any_of(m_entries.begin(), m_entries.end(), [&](auto& entry) {
LibJS: Handle empty named export This is an export which looks like `export {} from "module"`, and although it doesn't have any real export entries it should still add "module" to the required modules to load.
2022-08-29 22:12:25 +02:00
// Make sure that empty exported names does not overlap with anything
LibJS: Only check for duplicate exports if they have a name Together with removing an incorrect VERIFY this allows multiple star imports in a single module.
2022-09-01 22:55:02 +02:00
if (entry.kind != ExportEntry::Kind::NamedExport)
LibJS: Handle empty named export This is an export which looks like `export {} from "module"`, and although it doesn't have any real export entries it should still add "module" to the required modules to load.
2022-08-29 22:12:25 +02:00
return false;
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
return entry.export_name == export_name;
});
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
bool ImportStatement::has_bound_name(DeprecatedFlyString const& name) const
LibJS: Parse and partially execute import and export statements We produce the import and export entries as per the spec. However we do not yet verify that named things that are exported are declared somewhere.
2021-08-14 17:42:30 +02:00
{
return any_of(m_entries.begin(), m_entries.end(), [&](auto& entry) {
return entry.local_name == name;
});
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// 14.2.3 BlockDeclarationInstantiation ( code, env ), https://tc39.es/ecma262/#sec-blockdeclarationinstantiation
LibJS: Make BlockDeclarationInstantiation take a VM& There's no need for this to require an AST Interpreter.
2023-06-16 16:12:11 +02:00
void ScopeNode::block_declaration_instantiation(VM& vm, Environment* environment) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
// See also B.3.2.6 Changes to BlockDeclarationInstantiation, https://tc39.es/ecma262/#sec-web-compat-blockdeclarationinstantiation
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(environment);
LibJS+LibWeb: Wrap raw JS::Cell*/& fields in GCPtr/NonnullGCPtr
2023-02-26 16:09:02 -07:00
auto private_environment = vm.running_execution_context().private_environment;
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// Note: All the calls here are ! and thus we do not need to TRY this callback.
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// We use MUST to ensure it does not throw and to avoid discarding the returned ThrowCompletionOr<void>.
MUST(for_each_lexically_scoped_declaration([&](Declaration const& declaration) {
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
auto is_constant_declaration = declaration.is_constant_declaration();
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
// NOTE: Due to the use of MUST with `create_immutable_binding` and `create_mutable_binding` below,
// an exception should not result from `for_each_bound_name`.
MUST(declaration.for_each_bound_name([&](auto const& name) {
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (is_constant_declaration) {
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(environment->create_immutable_binding(vm, name, true));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
} else {
LibJS: Convert has_binding() to ThrowCompletionOr Also add spec step comments to it while we're here.
2021-10-09 17:07:32 +01:00
if (!MUST(environment->has_binding(name)))
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
MUST(environment->create_mutable_binding(vm, name, false));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (is<FunctionDeclaration>(declaration)) {
auto& function_declaration = static_cast<FunctionDeclaration const&>(declaration);
LibJS: Convert ECMAScriptFunctionObject::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto function = ECMAScriptFunctionObject::create(realm, function_declaration.name(), function_declaration.source_text(), function_declaration.body(), function_declaration.parameters(), function_declaration.function_length(), environment, private_environment, function_declaration.kind(), function_declaration.is_strict_mode(), function_declaration.might_need_arguments_object(), function_declaration.contains_direct_call_to_eval());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
VERIFY(is<DeclarativeEnvironment>(*environment));
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
static_cast<DeclarativeEnvironment&>(*environment).initialize_or_set_mutable_binding({}, vm, function_declaration.name(), function);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Don't discard ThrowCompletionOr<void> from declaration iteration
2023-02-27 22:13:37 +00:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
// 16.1.7 GlobalDeclarationInstantiation ( script, env ), https://tc39.es/ecma262/#sec-globaldeclarationinstantiation
LibJS: Make GlobalDeclarationInstantiation take a VM& This doesn't need to take an AST Interpreter&.
2023-06-15 10:37:42 +02:00
ThrowCompletionOr<void> Program::global_declaration_instantiation(VM& vm, GlobalEnvironment& global_environment) const
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
{
LibJS+LibWeb: Reduce use of GlobalObject as an intermediary - Prefer VM::current_realm() over GlobalObject::associated_realm() - Prefer VM::heap() over GlobalObject::heap() - Prefer Cell::vm() over Cell::global_object() - Prefer Wrapper::vm() over Wrapper::global_object() - Inline Realm::global_object() calls used to access intrinsics as they will later perform a direct lookup without going through the global object
2022-08-22 19:00:49 +01:00
auto& realm = *vm.current_realm();
LibJS+LibWeb: Replace GlobalObject with Realm in create() functions This is a continuation of the previous two commits. As allocating a JS cell already primarily involves a realm instead of a global object, and we'll need to pass one to the allocate() function itself eventually (it's bridged via the global object right now), the create() functions need to receive a realm as well. The plan is for this to be the highest-level function that actually receives a realm and passes it around, AOs on an even higher level will use the "current realm" concept via VM::current_realm() as that's what the spec assumes; passing around realms (or global objects, for that matter) on higher AO levels is pointless and unlike for allocating individual objects, which may happen outside of regular JS execution, we don't need control over the specific realm that is being used there.
2022-08-16 00:20:49 +01:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 1. Let lexNames be the LexicallyDeclaredNames of script.
// 2. Let varNames be the VarDeclaredNames of script.
// 3. For each element name of lexNames, do
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
TRY(for_each_lexically_declared_name([&](DeprecatedFlyString const& name) -> ThrowCompletionOr<void> {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// a. If env.HasVarDeclaration(name) is true, throw a SyntaxError exception.
if (global_environment.has_var_declaration(name))
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<SyntaxError>(ErrorType::TopLevelVariableAlreadyDeclared, name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// b. If env.HasLexicalDeclaration(name) is true, throw a SyntaxError exception.
if (global_environment.has_lexical_declaration(name))
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<SyntaxError>(ErrorType::TopLevelVariableAlreadyDeclared, name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// c. Let hasRestrictedGlobal be ? env.HasRestrictedGlobalProperty(name).
auto has_restricted_global = TRY(global_environment.has_restricted_global_property(name));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// d. If hasRestrictedGlobal is true, throw a SyntaxError exception.
if (has_restricted_global)
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<SyntaxError>(ErrorType::RestrictedGlobalProperty, name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 4. For each element name of varNames, do
TRY(for_each_var_declared_name([&](auto const& name) -> ThrowCompletionOr<void> {
// a. If env.HasLexicalDeclaration(name) is true, throw a SyntaxError exception.
if (global_environment.has_lexical_declaration(name))
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<SyntaxError>(ErrorType::TopLevelVariableAlreadyDeclared, name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 5. Let varDeclarations be the VarScopedDeclarations of script.
// 6. Let functionsToInitialize be a new empty List.
Vector<FunctionDeclaration const&> functions_to_initialize;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 7. Let declaredFunctionNames be a new empty List.
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
HashTable<DeprecatedFlyString> declared_function_names;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 8. For each element d of varDeclarations, in reverse List order, do
TRY(for_each_var_function_declaration_in_reverse_order([&](FunctionDeclaration const& function) -> ThrowCompletionOr<void> {
// a. If d is neither a VariableDeclaration nor a ForBinding nor a BindingIdentifier, then
// i. Assert: d is either a FunctionDeclaration, a GeneratorDeclaration, an AsyncFunctionDeclaration, or an AsyncGeneratorDeclaration.
// Note: This is checked in for_each_var_function_declaration_in_reverse_order.
// ii. NOTE: If there are multiple function declarations for the same name, the last declaration is used.
// iii. Let fn be the sole element of the BoundNames of d.
// iv. If fn is not an element of declaredFunctionNames, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (declared_function_names.set(function.name()) != AK::HashSetResult::InsertedNewEntry)
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 1. Let fnDefinable be ? env.CanDeclareGlobalFunction(fn).
auto function_definable = TRY(global_environment.can_declare_global_function(function.name()));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 2. If fnDefinable is false, throw a TypeError exception.
if (!function_definable)
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<TypeError>(ErrorType::CannotDeclareGlobalFunction, function.name());
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 3. Append fn to declaredFunctionNames.
// Note: Already done in step iv. above.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 4. Insert d as the first element of functionsToInitialize.
LibJS: Initialize functions in spec order This is only visible with something like `Object.getOwnPropertyNames` on the global object. All other declaration instantiations put the functions on an environment making the order invisible. Note that spec order is not quite tree order as in non-strict mode functions which get hoisted out of blocks appear before top level functions. Co-authored-by: Hendiadyoin1 <leon.a@serenityos.org>
2022-11-17 01:39:59 +01:00
// NOTE: Since prepending is much slower, we just append
// and iterate in reverse order in step 16 below.
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
functions_to_initialize.append(function);
return {};
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 9. Let declaredVarNames be a new empty List.
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
HashTable<DeprecatedFlyString> declared_var_names;
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 10. For each element d of varDeclarations, do
TRY(for_each_var_scoped_variable_declaration([&](Declaration const& declaration) {
// a. If d is a VariableDeclaration, a ForBinding, or a BindingIdentifier, then
// Note: This is done in for_each_var_scoped_variable_declaration.
// i. For each String vn of the BoundNames of d, do
return declaration.for_each_bound_name([&](auto const& name) -> ThrowCompletionOr<void> {
// 1. If vn is not an element of declaredFunctionNames, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (declared_function_names.contains(name))
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// a. Let vnDefinable be ? env.CanDeclareGlobalVar(vn).
auto var_definable = TRY(global_environment.can_declare_global_var(name));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// b. If vnDefinable is false, throw a TypeError exception.
if (!var_definable)
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
return vm.throw_completion<TypeError>(ErrorType::CannotDeclareGlobalVariable, name);
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// c. If vn is not an element of declaredVarNames, then
// i. Append vn to declaredVarNames.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
declared_var_names.set(name);
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
});
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 11. NOTE: No abnormal terminations occur after this algorithm step if the global object is an ordinary object. However, if the global object is a Proxy exotic object it may exhibit behaviours that cause abnormal terminations in some of the following steps.
// 12. NOTE: Annex B.3.2.2 adds additional steps at this point.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 12. Let strict be IsStrict of script.
// 13. If strict is false, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!m_is_strict_mode) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// a. Let declaredFunctionOrVarNames be the list-concatenation of declaredFunctionNames and declaredVarNames.
// b. For each FunctionDeclaration f that is directly contained in the StatementList of a Block, CaseClause, or DefaultClause Contained within script, do
TRY(for_each_function_hoistable_with_annexB_extension([&](FunctionDeclaration& function_declaration) -> ThrowCompletionOr<void> {
// i. Let F be StringValue of the BindingIdentifier of f.
LibJS: Use Identifier to represent name of FunctionNode
2023-07-02 00:35:51 +03:00
auto function_name = function_declaration.name();
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// ii. If replacing the FunctionDeclaration f with a VariableStatement that has F as a BindingIdentifier would not produce any Early Errors for script, then
// Note: This step is already performed during parsing and for_each_function_hoistable_with_annexB_extension so this always passes here.
// 1. If env.HasLexicalDeclaration(F) is false, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (global_environment.has_lexical_declaration(function_name))
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// a. Let fnDefinable be ? env.CanDeclareGlobalVar(F).
auto function_definable = TRY(global_environment.can_declare_global_function(function_name));
// b. If fnDefinable is true, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
if (!function_definable)
return {};
// i. NOTE: A var binding for F is only instantiated here if it is neither a VarDeclaredName nor the name of another FunctionDeclaration.
// ii. If declaredFunctionOrVarNames does not contain F, then
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
if (!declared_function_names.contains(function_name) && !declared_var_names.contains(function_name)) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// i. Perform ? env.CreateGlobalVarBinding(F, false).
TRY(global_environment.create_global_var_binding(function_name, false));
// ii. Append F to declaredFunctionOrVarNames.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
declared_function_names.set(function_name);
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// iii. When the FunctionDeclaration f is evaluated, perform the following steps in place of the FunctionDeclaration Evaluation algorithm provided in 15.2.6:
// i. Let genv be the running execution context's VariableEnvironment.
// ii. Let benv be the running execution context's LexicalEnvironment.
// iii. Let fobj be ! benv.GetBindingValue(F, false).
// iv. Perform ? genv.SetMutableBinding(F, fobj, false).
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// v. Return unused.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
function_declaration.set_should_do_additional_annexB_steps();
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
return {};
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
// We should not use declared function names below here anymore since these functions are not in there in the spec.
declared_function_names.clear();
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 13. Let lexDeclarations be the LexicallyScopedDeclarations of script.
// 14. Let privateEnv be null.
LibJS: Add PrivateEnvironment
2021-10-11 20:29:31 +02:00
PrivateEnvironment* private_environment = nullptr;
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 15. For each element d of lexDeclarations, do
TRY(for_each_lexically_scoped_declaration([&](Declaration const& declaration) {
// a. NOTE: Lexically declared names are only instantiated here but not initialized.
// b. For each element dn of the BoundNames of d, do
return declaration.for_each_bound_name([&](auto const& name) -> ThrowCompletionOr<void> {
// i. If IsConstantDeclaration of d is true, then
if (declaration.is_constant_declaration()) {
// 1. Perform ? env.CreateImmutableBinding(dn, true).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
TRY(global_environment.create_immutable_binding(vm, name, true));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}
// ii. Else,
else {
// 1. Perform ? env.CreateMutableBinding(dn, false).
LibJS: Replace GlobalObject with VM in Environment AOs [Part 5/19]
2022-08-21 15:12:43 +01:00
TRY(global_environment.create_mutable_binding(vm, name, false));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}
return {};
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
});
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 16. For each Parse Node f of functionsToInitialize, do
LibJS: Initialize functions in spec order This is only visible with something like `Object.getOwnPropertyNames` on the global object. All other declaration instantiations put the functions on an environment making the order invisible. Note that spec order is not quite tree order as in non-strict mode functions which get hoisted out of blocks appear before top level functions. Co-authored-by: Hendiadyoin1 <leon.a@serenityos.org>
2022-11-17 01:39:59 +01:00
// NOTE: We iterate in reverse order since we appended the functions
// instead of prepending. We append because prepending is much slower
// and we only use the created vector here.
for (auto& declaration : functions_to_initialize.in_reverse()) {
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// a. Let fn be the sole element of the BoundNames of f.
// b. Let fo be InstantiateFunctionObject of f with arguments env and privateEnv.
LibJS: Convert ECMAScriptFunctionObject::create() to NonnullGCPtr
2022-12-13 20:49:50 +00:00
auto function = ECMAScriptFunctionObject::create(realm, declaration.name(), declaration.source_text(), declaration.body(), declaration.parameters(), declaration.function_length(), &global_environment, private_environment, declaration.kind(), declaration.is_strict_mode(), declaration.might_need_arguments_object(), declaration.contains_direct_call_to_eval());
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// c. Perform ? env.CreateGlobalFunctionBinding(fn, fo, false).
LibJS: Convert create_global_function_binding() to ThrowCompletionOr
2021-12-29 16:02:44 +01:00
TRY(global_environment.create_global_function_binding(declaration.name(), function, false));
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
}
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
// 17. For each String vn of declaredVarNames, do
for (auto& var_name : declared_var_names) {
// a. Perform ? env.CreateGlobalVarBinding(vn, false).
LibJS: Convert create_global_var_binding() to ThrowCompletionOr
2021-12-29 16:00:36 +01:00
TRY(global_environment.create_global_var_binding(var_name, false));
LibJS: Convert ScopeNode declaration functions to ThrowCompletionOr This removes a number of vm.exception() checks which are now caught directly by TRY. Make use of these checks in {Global, Eval}DeclarationInstantiation and while we're here add spec comments.
2022-02-07 13:31:01 +01:00
}
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
LibJS: Remove implicit wrapping/unwrapping of completion records This is an editorial change in the ECMA-262 spec, with similar changes in some proposals. See: - https://github.com/tc39/ecma262/commit/7575f74 - https://github.com/tc39/proposal-array-grouping/commit/df899eb - https://github.com/tc39/proposal-shadowrealm/commit/9eb5a12 - https://github.com/tc39/proposal-shadowrealm/commit/c81f527
2022-05-02 20:54:39 +02:00
// 18. Return unused.
LibJS: Make scoping follow the spec Before this we used an ad-hoc combination of references and 'variables' stored in a hashmap. This worked in most cases but is not spec like. Additionally hoisting, dynamically naming functions and scope analysis was not done properly. This patch fixes all of that by: - Implement BindingInitialization for destructuring assignment. - Implementing a new ScopePusher which tracks the lexical and var scoped declarations. This hoists functions to the top level if no lexical declaration name overlaps. Furthermore we do checking of redeclarations in the ScopePusher now requiring less checks all over the place. - Add methods for parsing the directives and statement lists instead of having that code duplicated in multiple places. This allows declarations to pushed to the appropriate scope more easily. - Remove the non spec way of storing 'variables' in DeclarativeEnvironment and make Reference follow the spec instead of checking both the bindings and 'variables'. - Remove all scoping related things from the Interpreter. And instead use environments as specified by the spec. This also includes fixing that NativeFunctions did not produce a valid FunctionEnvironment which could cause issues with callbacks and eval. All FunctionObjects now have a valid NewFunctionEnvironment implementation. - Remove execute_statements from Interpreter and instead use ASTNode::execute everywhere this simplifies AST.cpp as you no longer need to worry about which method to call. - Make ScopeNodes setup their own environment. This uses four different methods specified by the spec {Block, Function, Eval, Global}DeclarationInstantiation with the annexB extensions. - Implement and use NamedEvaluation where specified. Additionally there are fixes to things exposed by these changes to eval, {for, for-in, for-of} loops and assignment. Finally it also fixes some tests in test-js which where passing before but not now that we have correct behavior :^).
2021-09-22 12:44:56 +02:00
return {};
}
AK+Everywhere: Rename FlyString to DeprecatedFlyString DeprecatedFlyString relies heavily on DeprecatedString's StringImpl, so let's rename it to A) match the name of DeprecatedString, B) write a new FlyString class that is tied to String.
2023-01-08 19:23:00 -05:00
ModuleRequest::ModuleRequest(DeprecatedFlyString module_specifier_, Vector<Assertion> assertions_)
LibJS: Implement the import assertions proposal The hard part of parsing them in import statements and calls was already done so this is just removing some check which threw before on assertions. And filtering the assertions based on the result of a new host hook.
2022-01-27 02:44:03 +01:00
: module_specifier(move(module_specifier_))
, assertions(move(assertions_))
{
// Perform step 10.e. from EvaluateImportCall, https://tc39.es/proposal-import-assertions/#sec-evaluate-import-call
// or step 2. from 2.7 Static Semantics: AssertClauseToAssertions, https://tc39.es/proposal-import-assertions/#sec-assert-clause-to-assertions
// e. / 2. Sort assertions by the code point order of the [[Key]] of each element.
// NOTE: This sorting is observable only in that hosts are prohibited from distinguishing among assertions by the order they occur in.
quick_sort(assertions, [](Assertion const& lhs, Assertion const& rhs) {
return lhs.key < rhs.key;
});
}
LibJS: Remove DeprecatedString usage from SourceCode This change also requires updates to some users of the SourceCode interface since it no longer use DeprecatedString.
2023-01-26 08:33:18 -05:00
DeprecatedString SourceRange::filename() const
LibJS: Reduce AST memory usage by shrink-wrapping source range info Before this change, each AST node had a 64-byte SourceRange member. This SourceRange had the following layout: filename: StringView (16 bytes) start: Position (24 bytes) end: Position (24 bytes) The Position structs have { line, column, offset }, all members size_t. To reduce memory consumption, AST nodes now only store the following: source_code: NonnullRefPtr<SourceCode> (8 bytes) start_offset: u32 (4 bytes) end_offset: u32 (4 bytes) SourceCode is a new ref-counted data structure that keeps the filename and original parsed source code in a single location, and all AST nodes have a pointer to it. The start_offset and end_offset can be turned into (line, column) when necessary by calling SourceCode::range_from_offsets(). This will walk the source code string and compute line/column numbers on the fly, so it's not necessarily fast, but it should be rare since this information is primarily used for diagnostics and exception stack traces. With this, ASTNode shrinks from 80 bytes to 32 bytes. This gives us a ~23% reduction in memory usage when loading twitter.com/awesomekling (330 MiB before, 253 MiB after!) :^)
2022-11-21 17:37:38 +01:00
{
LibJS: Remove DeprecatedString usage from SourceCode This change also requires updates to some users of the SourceCode interface since it no longer use DeprecatedString.
2023-01-26 08:33:18 -05:00
return code->filename().to_deprecated_string();
LibJS: Reduce AST memory usage by shrink-wrapping source range info Before this change, each AST node had a 64-byte SourceRange member. This SourceRange had the following layout: filename: StringView (16 bytes) start: Position (24 bytes) end: Position (24 bytes) The Position structs have { line, column, offset }, all members size_t. To reduce memory consumption, AST nodes now only store the following: source_code: NonnullRefPtr<SourceCode> (8 bytes) start_offset: u32 (4 bytes) end_offset: u32 (4 bytes) SourceCode is a new ref-counted data structure that keeps the filename and original parsed source code in a single location, and all AST nodes have a pointer to it. The start_offset and end_offset can be turned into (line, column) when necessary by calling SourceCode::range_from_offsets(). This will walk the source code string and compute line/column numbers on the fly, so it's not necessarily fast, but it should be rare since this information is primarily used for diagnostics and exception stack traces. With this, ASTNode shrinks from 80 bytes to 32 bytes. This gives us a ~23% reduction in memory usage when loading twitter.com/awesomekling (330 MiB before, 253 MiB after!) :^)
2022-11-21 17:37:38 +01:00
}
LibJS: Correctly handle parentheses and new Object Parses `new Object()?.foo`, `(new Object)?.foo` and shows syntax error on `new Object?.foo`
2023-06-15 15:13:48 +05:30
NonnullRefPtr<CallExpression> CallExpression::create(SourceRange source_range, NonnullRefPtr<Expression const> callee, ReadonlySpan<Argument> arguments, InvocationStyleEnum invocation_style, InsideParenthesesEnum inside_parens)
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
{
LibJS: Correctly handle parentheses and new Object Parses `new Object()?.foo`, `(new Object)?.foo` and shows syntax error on `new Object?.foo`
2023-06-15 15:13:48 +05:30
return ASTNodeWithTailArray::create<CallExpression>(arguments.size(), move(source_range), move(callee), arguments, invocation_style, inside_parens);
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
}
LibJS: Correctly handle parentheses and new Object Parses `new Object()?.foo`, `(new Object)?.foo` and shows syntax error on `new Object?.foo`
2023-06-15 15:13:48 +05:30
NonnullRefPtr<NewExpression> NewExpression::create(SourceRange source_range, NonnullRefPtr<Expression const> callee, ReadonlySpan<Argument> arguments, InvocationStyleEnum invocation_style, InsideParenthesesEnum inside_parens)
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
{
LibJS: Correctly handle parentheses and new Object Parses `new Object()?.foo`, `(new Object)?.foo` and shows syntax error on `new Object?.foo`
2023-06-15 15:13:48 +05:30
return ASTNodeWithTailArray::create<NewExpression>(arguments.size(), move(source_range), move(callee), arguments, invocation_style, inside_parens);
LibJS: Make one compact allocation for CallExpression and its Arguments Instead of CallExpression storing its arguments in a Vector<Argument>, we now custom-allocate the memory slot for CallExpression (and its subclass NewExpression) so that it fits both CallExpression and its list of Arguments in one allocation. This reduces memory usage on twitter.com/awesomekling by 8.8 MiB :^)
2022-11-26 19:51:50 +01:00
}
LibJS: Start building a JavaScript engine for SerenityOS :^) I always tell people to start building things by working on the thing that seems the most interesting right now. The most interesting thing here was an AST + simple interpreter, so that's where we start! There is no lexer or parser yet, we build an AST directly and then execute it in the interpreter, producing a return value. This seems like the start of something interesting. :^)
2020-03-07 19:42:11 +01:00
}
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