mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-31 05:10:57 +00:00
5832de62fe
Both at the same time because many of them call construct() in call() and I'm not keen on adding a bunch of temporary plumbing to turn exceptions into throw completions. Also changes the return value of construct() to Object* instead of Value as it always needs to return an object; allowing an arbitrary Value is a massive foot gun.
99 lines
3.6 KiB
C++
99 lines
3.6 KiB
C++
/*
|
|
* Copyright (c) 2020, Linus Groh <linusg@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/AST.h>
|
|
#include <LibJS/Interpreter.h>
|
|
#include <LibJS/Lexer.h>
|
|
#include <LibJS/Parser.h>
|
|
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
|
|
#include <LibJS/Runtime/Error.h>
|
|
#include <LibJS/Runtime/FunctionConstructor.h>
|
|
#include <LibJS/Runtime/FunctionObject.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
|
|
namespace JS {
|
|
|
|
FunctionConstructor::FunctionConstructor(GlobalObject& global_object)
|
|
: NativeFunction(vm().names.Function.as_string(), *global_object.function_prototype())
|
|
{
|
|
}
|
|
|
|
void FunctionConstructor::initialize(GlobalObject& global_object)
|
|
{
|
|
auto& vm = this->vm();
|
|
NativeFunction::initialize(global_object);
|
|
|
|
// 20.2.2.2 Function.prototype, https://tc39.es/ecma262/#sec-function.prototype
|
|
define_direct_property(vm.names.prototype, global_object.function_prototype(), 0);
|
|
|
|
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
|
|
}
|
|
|
|
FunctionConstructor::~FunctionConstructor()
|
|
{
|
|
}
|
|
|
|
// 20.2.1.1.1 CreateDynamicFunction ( constructor, newTarget, kind, args ), https://tc39.es/ecma262/#sec-createdynamicfunction
|
|
RefPtr<FunctionExpression> FunctionConstructor::create_dynamic_function_node(GlobalObject& global_object, FunctionObject&, FunctionKind kind)
|
|
{
|
|
auto& vm = global_object.vm();
|
|
String parameters_source = "";
|
|
String body_source = "";
|
|
if (vm.argument_count() == 1)
|
|
body_source = TRY_OR_DISCARD(vm.argument(0).to_string(global_object));
|
|
if (vm.argument_count() > 1) {
|
|
Vector<String> parameters;
|
|
for (size_t i = 0; i < vm.argument_count() - 1; ++i)
|
|
parameters.append(TRY_OR_DISCARD(vm.argument(i).to_string(global_object)));
|
|
StringBuilder parameters_builder;
|
|
parameters_builder.join(',', parameters);
|
|
parameters_source = parameters_builder.build();
|
|
body_source = TRY_OR_DISCARD(vm.argument(vm.argument_count() - 1).to_string(global_object));
|
|
}
|
|
auto is_generator = kind == FunctionKind::Generator;
|
|
auto source = String::formatted("function{} anonymous({}\n) {{\n{}\n}}", is_generator ? "*" : "", parameters_source, body_source);
|
|
auto parser = Parser(Lexer(source));
|
|
auto function = parser.parse_function_node<FunctionExpression>();
|
|
if (parser.has_errors()) {
|
|
auto error = parser.errors()[0];
|
|
vm.throw_exception<SyntaxError>(global_object, error.to_string());
|
|
return {};
|
|
}
|
|
|
|
return function;
|
|
}
|
|
|
|
// 20.2.1.1 Function ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-function-p1-p2-pn-body
|
|
ThrowCompletionOr<Value> FunctionConstructor::call()
|
|
{
|
|
return TRY(construct(*this));
|
|
}
|
|
|
|
// 20.2.1.1 Function ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-function-p1-p2-pn-body
|
|
ThrowCompletionOr<Object*> FunctionConstructor::construct(FunctionObject& new_target)
|
|
{
|
|
auto& vm = this->vm();
|
|
auto function = create_dynamic_function_node(global_object(), new_target, FunctionKind::Regular);
|
|
if (auto* exception = vm.exception())
|
|
return throw_completion(exception->value());
|
|
|
|
OwnPtr<Interpreter> local_interpreter;
|
|
Interpreter* interpreter = vm.interpreter_if_exists();
|
|
|
|
if (!interpreter) {
|
|
local_interpreter = Interpreter::create_with_existing_realm(*realm());
|
|
interpreter = local_interpreter.ptr();
|
|
}
|
|
|
|
VM::InterpreterExecutionScope scope(*interpreter);
|
|
auto result = function->execute(*interpreter, global_object());
|
|
if (auto* exception = vm.exception())
|
|
return throw_completion(exception->value());
|
|
VERIFY(result.is_object() && is<ECMAScriptFunctionObject>(result.as_object()));
|
|
return &result.as_object();
|
|
}
|
|
|
|
}
|