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ladybird/Userland/Libraries/LibJS/AST.cpp
davidot 020bfc9d93 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.
2021-08-15 23:51:47 +01:00

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/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Demangle.h>
#include <AK/HashMap.h>
#include <AK/HashTable.h>
#include <AK/ScopeGuard.h>
#include <AK/StringBuilder.h>
#include <AK/TemporaryChange.h>
#include <LibCrypto/BigInt/SignedBigInteger.h>
#include <LibJS/AST.h>
#include <LibJS/Interpreter.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Accessor.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/BigInt.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/FunctionEnvironment.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/IteratorOperations.h>
#include <LibJS/Runtime/MarkedValueList.h>
#include <LibJS/Runtime/NativeFunction.h>
#include <LibJS/Runtime/ObjectEnvironment.h>
#include <LibJS/Runtime/OrdinaryFunctionObject.h>
#include <LibJS/Runtime/PrimitiveString.h>
#include <LibJS/Runtime/Reference.h>
#include <LibJS/Runtime/RegExpObject.h>
#include <LibJS/Runtime/Shape.h>
#include <typeinfo>
namespace JS {
class InterpreterNodeScope {
AK_MAKE_NONCOPYABLE(InterpreterNodeScope);
AK_MAKE_NONMOVABLE(InterpreterNodeScope);
public:
InterpreterNodeScope(Interpreter& interpreter, ASTNode const& node)
: m_interpreter(interpreter)
, m_chain_node { nullptr, node }
{
m_interpreter.vm().running_execution_context().current_node = &node;
m_interpreter.push_ast_node(m_chain_node);
}
~InterpreterNodeScope()
{
m_interpreter.pop_ast_node();
}
private:
Interpreter& m_interpreter;
ExecutingASTNodeChain m_chain_node;
};
String ASTNode::class_name() const
{
// NOTE: We strip the "JS::" prefix.
return demangle(typeid(*this).name()).substring(4);
}
static void update_function_name(Value value, FlyString const& name)
{
if (!value.is_function())
return;
auto& function = value.as_function();
if (is<OrdinaryFunctionObject>(function) && function.name().is_empty())
static_cast<OrdinaryFunctionObject&>(function).set_name(name);
}
static String get_function_name(GlobalObject& global_object, Value value)
{
if (value.is_symbol())
return String::formatted("[{}]", value.as_symbol().description());
if (value.is_string())
return value.as_string().string();
return value.to_string(global_object);
}
Value ScopeNode::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return interpreter.execute_statement(global_object, *this);
}
Value Program::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return interpreter.execute_statement(global_object, *this, ScopeType::Block);
}
Value FunctionDeclaration::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return {};
}
// 15.2.5 Runtime Semantics: InstantiateOrdinaryFunctionExpression, https://tc39.es/ecma262/#sec-runtime-semantics-instantiateordinaryfunctionexpression
Value FunctionExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto* func_env = interpreter.lexical_environment();
bool has_identifier = !name().is_empty() && !is_auto_renamed();
if (has_identifier) {
func_env = interpreter.heap().allocate<DeclarativeEnvironment>(global_object, func_env);
func_env->create_immutable_binding(global_object, name(), false);
}
auto closure = OrdinaryFunctionObject::create(global_object, name(), body(), parameters(), function_length(), func_env, kind(), is_strict_mode(), is_arrow_function());
if (has_identifier)
func_env->initialize_binding(global_object, name(), closure);
return closure;
}
Value ExpressionStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return m_expression->execute(interpreter, global_object);
}
CallExpression::ThisAndCallee CallExpression::compute_this_and_callee(Interpreter& interpreter, GlobalObject& global_object) const
{
auto& vm = interpreter.vm();
if (is<MemberExpression>(*m_callee)) {
auto& member_expression = static_cast<MemberExpression const&>(*m_callee);
Value callee;
Value this_value;
if (is<SuperExpression>(member_expression.object())) {
auto super_base = interpreter.current_function_environment()->get_super_base();
if (super_base.is_nullish()) {
vm.throw_exception<TypeError>(global_object, ErrorType::ObjectPrototypeNullOrUndefinedOnSuperPropertyAccess, super_base.to_string_without_side_effects());
return {};
}
auto property_name = member_expression.computed_property_name(interpreter, global_object);
if (!property_name.is_valid())
return {};
auto reference = Reference { super_base, property_name, super_base, vm.in_strict_mode() };
callee = reference.get_value(global_object);
if (vm.exception())
return {};
this_value = &vm.this_value(global_object).as_object();
} else {
auto reference = member_expression.to_reference(interpreter, global_object);
if (vm.exception())
return {};
callee = reference.get_value(global_object);
if (vm.exception())
return {};
this_value = reference.get_this_value();
}
return { this_value, callee };
}
// [[Call]] will handle that in non-strict mode the this value becomes the global object
return { js_undefined(), m_callee->execute(interpreter, global_object) };
}
// 13.3.8.1 Runtime Semantics: ArgumentListEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-argumentlistevaluation
static void argument_list_evaluation(Interpreter& interpreter, GlobalObject& global_object, Vector<CallExpression::Argument> const& arguments, MarkedValueList& list)
{
auto& vm = global_object.vm();
list.ensure_capacity(arguments.size());
for (auto& argument : arguments) {
auto value = argument.value->execute(interpreter, global_object);
if (vm.exception())
return;
if (argument.is_spread) {
get_iterator_values(global_object, value, [&](Value iterator_value) {
if (vm.exception())
return IterationDecision::Break;
list.append(iterator_value);
return IterationDecision::Continue;
});
if (vm.exception())
return;
} else {
list.append(value);
}
}
}
Value NewExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
auto callee_value = m_callee->execute(interpreter, global_object);
if (vm.exception())
return {};
if (!callee_value.is_function() || (is<NativeFunction>(callee_value.as_object()) && !static_cast<NativeFunction&>(callee_value.as_object()).has_constructor())) {
throw_type_error_for_callee(interpreter, global_object, callee_value, "constructor"sv);
return {};
}
MarkedValueList arg_list(vm.heap());
argument_list_evaluation(interpreter, global_object, m_arguments, arg_list);
if (interpreter.exception())
return {};
auto& function = callee_value.as_function();
return vm.construct(function, function, move(arg_list));
}
void CallExpression::throw_type_error_for_callee(Interpreter& interpreter, GlobalObject& global_object, Value callee_value, StringView call_type) const
{
auto& vm = interpreter.vm();
if (is<Identifier>(*m_callee) || is<MemberExpression>(*m_callee)) {
String expression_string;
if (is<Identifier>(*m_callee)) {
expression_string = static_cast<Identifier const&>(*m_callee).string();
} else {
expression_string = static_cast<MemberExpression const&>(*m_callee).to_string_approximation();
}
vm.throw_exception<TypeError>(global_object, ErrorType::IsNotAEvaluatedFrom, callee_value.to_string_without_side_effects(), call_type, expression_string);
} else {
vm.throw_exception<TypeError>(global_object, ErrorType::IsNotA, callee_value.to_string_without_side_effects(), call_type);
}
}
Value CallExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
auto [this_value, callee] = compute_this_and_callee(interpreter, global_object);
if (vm.exception())
return {};
VERIFY(!callee.is_empty());
if (!callee.is_function()) {
throw_type_error_for_callee(interpreter, global_object, callee, "function"sv);
return {};
}
MarkedValueList arg_list(vm.heap());
argument_list_evaluation(interpreter, global_object, m_arguments, arg_list);
if (interpreter.exception())
return {};
auto& function = callee.as_function();
if (is<Identifier>(*m_callee) && static_cast<Identifier const&>(*m_callee).string() == vm.names.eval.as_string() && &function == global_object.eval_function()) {
auto script_value = arg_list.size() == 0 ? js_undefined() : arg_list[0];
return perform_eval(script_value, global_object, vm.in_strict_mode() ? CallerMode::Strict : CallerMode::NonStrict, EvalMode::Direct);
}
return vm.call(function, this_value, move(arg_list));
}
// 13.3.7.1 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-super-keyword-runtime-semantics-evaluation
// SuperCall : super Arguments
Value SuperCall::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
// 1. Let newTarget be GetNewTarget().
auto new_target = vm.get_new_target();
if (vm.exception())
return {};
// 2. Assert: Type(newTarget) is Object.
VERIFY(new_target.is_function());
// 3. Let func be ! GetSuperConstructor().
auto* func = get_super_constructor(interpreter.vm());
VERIFY(!vm.exception());
// 4. Let argList be ? ArgumentListEvaluation of Arguments.
MarkedValueList arg_list(vm.heap());
argument_list_evaluation(interpreter, global_object, m_arguments, arg_list);
if (interpreter.exception())
return {};
// 5. If IsConstructor(func) is false, throw a TypeError exception.
// FIXME: This check is non-conforming.
if (!func || !func->is_function()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAConstructor, "Super constructor");
return {};
}
// 6. Let result be ? Construct(func, argList, newTarget).
auto& function = new_target.as_function();
auto result = vm.construct(static_cast<FunctionObject&>(*func), function, move(arg_list));
if (vm.exception())
return {};
// 7. Let thisER be GetThisEnvironment().
auto& this_er = verify_cast<FunctionEnvironment>(get_this_environment(interpreter.vm()));
// 8. Perform ? thisER.BindThisValue(result).
this_er.bind_this_value(global_object, result);
if (vm.exception())
return {};
// 9. Let F be thisER.[[FunctionObject]].
// 10. Assert: F is an ECMAScript function object. (NOTE: This is implied by the strong C++ type.)
[[maybe_unused]] auto& f = this_er.function_object();
// 11. Perform ? InitializeInstanceElements(result, F).
// FIXME: This is missing here.
// 12. Return result.
return result;
}
Value YieldExpression::execute(Interpreter&, GlobalObject&) const
{
// This should be transformed to a return.
VERIFY_NOT_REACHED();
}
Value ReturnStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto value = argument() ? argument()->execute(interpreter, global_object) : js_undefined();
if (interpreter.exception())
return {};
interpreter.vm().unwind(ScopeType::Function);
return value;
}
Value IfStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto predicate_result = m_predicate->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (predicate_result.to_boolean())
return interpreter.execute_statement(global_object, *m_consequent);
if (m_alternate)
return interpreter.execute_statement(global_object, *m_alternate);
return js_undefined();
}
// 14.11.2 Runtime Semantics: Evaluation, https://tc39.es/ecma262/#sec-with-statement-runtime-semantics-evaluation
// WithStatement : with ( Expression ) Statement
Value WithStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// 1. Let value be the result of evaluating Expression.
auto value = m_object->execute(interpreter, global_object);
if (interpreter.exception())
return {};
// 2. Let obj be ? ToObject(? GetValue(value)).
auto* object = value.to_object(global_object);
if (interpreter.exception())
return {};
// 3. Let oldEnv be the running execution context's LexicalEnvironment.
auto* old_environment = interpreter.vm().running_execution_context().lexical_environment;
// 4. Let newEnv be NewObjectEnvironment(obj, true, oldEnv).
auto* new_environment = new_object_environment(*object, true, old_environment);
if (interpreter.exception())
return {};
// 5. Set the running execution context's LexicalEnvironment to newEnv.
interpreter.vm().running_execution_context().lexical_environment = new_environment;
// 6. Let C be the result of evaluating Statement.
auto result = interpreter.execute_statement(global_object, m_body).value_or(js_undefined());
if (interpreter.exception())
return {};
// 7. Set the running execution context's LexicalEnvironment to oldEnv.
interpreter.vm().running_execution_context().lexical_environment = old_environment;
// 8. Return Completion(UpdateEmpty(C, undefined)).
return result;
}
Value WhileStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto last_value = js_undefined();
for (;;) {
auto test_result = m_test->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (!test_result.to_boolean())
break;
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
break;
} else {
return last_value;
}
}
}
return last_value;
}
Value DoWhileStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto last_value = js_undefined();
for (;;) {
if (interpreter.exception())
return {};
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
break;
} else {
return last_value;
}
}
auto test_result = m_test->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (!test_result.to_boolean())
break;
}
return last_value;
}
Value ForStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
RefPtr<BlockStatement> wrapper;
if (m_init && is<VariableDeclaration>(*m_init) && static_cast<VariableDeclaration const&>(*m_init).declaration_kind() != DeclarationKind::Var) {
wrapper = create_ast_node<BlockStatement>(source_range());
NonnullRefPtrVector<VariableDeclaration> decls;
decls.append(*static_cast<VariableDeclaration const*>(m_init.ptr()));
wrapper->add_variables(decls);
interpreter.enter_scope(*wrapper, ScopeType::Block, global_object);
}
auto wrapper_cleanup = ScopeGuard([&] {
if (wrapper)
interpreter.exit_scope(*wrapper);
});
auto last_value = js_undefined();
if (m_init) {
m_init->execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
if (m_test) {
while (true) {
auto test_result = m_test->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (!test_result.to_boolean())
break;
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
break;
} else {
return last_value;
}
}
if (m_update) {
m_update->execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
}
} else {
while (true) {
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
break;
} else {
return last_value;
}
}
if (m_update) {
m_update->execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
}
}
return last_value;
}
static Variant<NonnullRefPtr<Identifier>, NonnullRefPtr<BindingPattern>> variable_from_for_declaration(Interpreter& interpreter, GlobalObject& global_object, ASTNode const& node, RefPtr<BlockStatement> wrapper)
{
if (is<VariableDeclaration>(node)) {
auto& variable_declaration = static_cast<VariableDeclaration const&>(node);
VERIFY(!variable_declaration.declarations().is_empty());
if (variable_declaration.declaration_kind() != DeclarationKind::Var) {
wrapper = create_ast_node<BlockStatement>(node.source_range());
interpreter.enter_scope(*wrapper, ScopeType::Block, global_object);
}
variable_declaration.execute(interpreter, global_object);
return variable_declaration.declarations().first().target();
}
if (is<Identifier>(node)) {
return NonnullRefPtr(static_cast<Identifier const&>(node));
}
VERIFY_NOT_REACHED();
}
Value ForInStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
bool has_declaration = is<VariableDeclaration>(*m_lhs);
if (!has_declaration && !is<Identifier>(*m_lhs)) {
// FIXME: Implement "for (foo.bar in baz)", "for (foo[0] in bar)"
VERIFY_NOT_REACHED();
}
RefPtr<BlockStatement> wrapper;
auto target = variable_from_for_declaration(interpreter, global_object, m_lhs, wrapper);
auto wrapper_cleanup = ScopeGuard([&] {
if (wrapper)
interpreter.exit_scope(*wrapper);
});
auto last_value = js_undefined();
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (rhs_result.is_nullish())
return {};
auto* object = rhs_result.to_object(global_object);
while (object) {
auto property_names = object->enumerable_own_property_names(Object::PropertyKind::Key);
for (auto& value : property_names) {
interpreter.vm().assign(target, value, global_object, has_declaration);
if (interpreter.exception())
return {};
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
break;
} else {
return last_value;
}
}
}
object = object->internal_get_prototype_of();
if (interpreter.exception())
return {};
}
return last_value;
}
Value ForOfStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
bool has_declaration = is<VariableDeclaration>(*m_lhs);
if (!has_declaration && !is<Identifier>(*m_lhs)) {
// FIXME: Implement "for (foo.bar of baz)", "for (foo[0] of bar)"
VERIFY_NOT_REACHED();
}
RefPtr<BlockStatement> wrapper;
auto target = variable_from_for_declaration(interpreter, global_object, m_lhs, wrapper);
auto wrapper_cleanup = ScopeGuard([&] {
if (wrapper)
interpreter.exit_scope(*wrapper);
});
auto last_value = js_undefined();
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
get_iterator_values(global_object, rhs_result, [&](Value value) {
interpreter.vm().assign(target, value, global_object, has_declaration);
last_value = interpreter.execute_statement(global_object, *m_body).value_or(last_value);
if (interpreter.exception())
return IterationDecision::Break;
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
interpreter.vm().stop_unwind();
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
return IterationDecision::Break;
} else {
return IterationDecision::Break;
}
}
return IterationDecision::Continue;
});
if (interpreter.exception())
return {};
return last_value;
}
Value BinaryExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto lhs_result = m_lhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
switch (m_op) {
case BinaryOp::Addition:
return add(global_object, lhs_result, rhs_result);
case BinaryOp::Subtraction:
return sub(global_object, lhs_result, rhs_result);
case BinaryOp::Multiplication:
return mul(global_object, lhs_result, rhs_result);
case BinaryOp::Division:
return div(global_object, lhs_result, rhs_result);
case BinaryOp::Modulo:
return mod(global_object, lhs_result, rhs_result);
case BinaryOp::Exponentiation:
return exp(global_object, lhs_result, rhs_result);
case BinaryOp::TypedEquals:
return Value(strict_eq(lhs_result, rhs_result));
case BinaryOp::TypedInequals:
return Value(!strict_eq(lhs_result, rhs_result));
case BinaryOp::AbstractEquals:
return Value(abstract_eq(global_object, lhs_result, rhs_result));
case BinaryOp::AbstractInequals:
return Value(!abstract_eq(global_object, lhs_result, rhs_result));
case BinaryOp::GreaterThan:
return greater_than(global_object, lhs_result, rhs_result);
case BinaryOp::GreaterThanEquals:
return greater_than_equals(global_object, lhs_result, rhs_result);
case BinaryOp::LessThan:
return less_than(global_object, lhs_result, rhs_result);
case BinaryOp::LessThanEquals:
return less_than_equals(global_object, lhs_result, rhs_result);
case BinaryOp::BitwiseAnd:
return bitwise_and(global_object, lhs_result, rhs_result);
case BinaryOp::BitwiseOr:
return bitwise_or(global_object, lhs_result, rhs_result);
case BinaryOp::BitwiseXor:
return bitwise_xor(global_object, lhs_result, rhs_result);
case BinaryOp::LeftShift:
return left_shift(global_object, lhs_result, rhs_result);
case BinaryOp::RightShift:
return right_shift(global_object, lhs_result, rhs_result);
case BinaryOp::UnsignedRightShift:
return unsigned_right_shift(global_object, lhs_result, rhs_result);
case BinaryOp::In:
return in(global_object, lhs_result, rhs_result);
case BinaryOp::InstanceOf:
return instance_of(global_object, lhs_result, rhs_result);
}
VERIFY_NOT_REACHED();
}
Value LogicalExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto lhs_result = m_lhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
switch (m_op) {
case LogicalOp::And:
if (lhs_result.to_boolean()) {
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
return rhs_result;
}
return lhs_result;
case LogicalOp::Or: {
if (lhs_result.to_boolean())
return lhs_result;
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
return rhs_result;
}
case LogicalOp::NullishCoalescing:
if (lhs_result.is_nullish()) {
auto rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
return rhs_result;
}
return lhs_result;
}
VERIFY_NOT_REACHED();
}
Reference Expression::to_reference(Interpreter&, GlobalObject&) const
{
return {};
}
Reference Identifier::to_reference(Interpreter& interpreter, GlobalObject&) const
{
return interpreter.vm().resolve_binding(string());
}
Reference MemberExpression::to_reference(Interpreter& interpreter, GlobalObject& global_object) const
{
// 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().
auto& environment = get_this_environment(interpreter.vm());
// 2. Let actualThis be ? env.GetThisBinding().
auto actual_this = environment.get_this_binding(global_object);
StringOrSymbol property_key;
if (is_computed()) {
// SuperProperty : super [ Expression ]
// 3. Let propertyNameReference be the result of evaluating Expression.
// 4. Let propertyNameValue be ? GetValue(propertyNameReference).
auto property_name_value = m_property->execute(interpreter, global_object);
if (interpreter.exception())
return {};
// 5. Let propertyKey be ? ToPropertyKey(propertyNameValue).
property_key = property_name_value.to_property_key(global_object);
} else {
// SuperProperty : super . IdentifierName
// 3. Let propertyKey be StringValue of IdentifierName.
VERIFY(is<Identifier>(property()));
property_key = static_cast<Identifier const&>(property()).string();
}
// 6. If the code matched by this SuperProperty is strict mode code, let strict be true; else let strict be false.
bool strict = interpreter.vm().in_strict_mode();
// 7. Return ? MakeSuperPropertyReference(actualThis, propertyKey, strict).
return make_super_property_reference(global_object, actual_this, property_key, strict);
}
auto object_value = m_object->execute(interpreter, global_object);
if (interpreter.exception())
return {};
// From here on equivalent to
// 13.3.4 EvaluatePropertyAccessWithIdentifierKey ( baseValue, identifierName, strict ), https://tc39.es/ecma262/#sec-evaluate-property-access-with-identifier-key
object_value = require_object_coercible(global_object, object_value);
if (interpreter.exception())
return {};
auto property_name = computed_property_name(interpreter, global_object);
if (!property_name.is_valid())
return Reference {};
auto strict = interpreter.vm().in_strict_mode();
return Reference { object_value, property_name, {}, strict };
}
Value UnaryExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
if (m_op == UnaryOp::Delete) {
auto reference = m_lhs->to_reference(interpreter, global_object);
if (interpreter.exception())
return {};
return Value(reference.delete_(global_object));
}
Value lhs_result;
if (m_op == UnaryOp::Typeof && is<Identifier>(*m_lhs)) {
auto reference = m_lhs->to_reference(interpreter, global_object);
if (interpreter.exception()) {
return {};
}
if (reference.is_unresolvable()) {
lhs_result = js_undefined();
} else {
lhs_result = reference.get_value(global_object, false);
}
} else {
lhs_result = m_lhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
switch (m_op) {
case UnaryOp::BitwiseNot:
return bitwise_not(global_object, lhs_result);
case UnaryOp::Not:
return Value(!lhs_result.to_boolean());
case UnaryOp::Plus:
return unary_plus(global_object, lhs_result);
case UnaryOp::Minus:
return unary_minus(global_object, lhs_result);
case UnaryOp::Typeof:
return js_string(vm, lhs_result.typeof());
case UnaryOp::Void:
return js_undefined();
case UnaryOp::Delete:
VERIFY_NOT_REACHED();
}
VERIFY_NOT_REACHED();
}
Value SuperExpression::execute(Interpreter&, GlobalObject&) const
{
// The semantics for SuperExpression are handled in CallExpression and SuperCall.
VERIFY_NOT_REACHED();
}
Value ClassMethod::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return m_function->execute(interpreter, global_object);
}
Value ClassExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
Value class_constructor_value = m_constructor->execute(interpreter, global_object);
if (interpreter.exception())
return {};
update_function_name(class_constructor_value, m_name);
VERIFY(class_constructor_value.is_function() && is<OrdinaryFunctionObject>(class_constructor_value.as_function()));
auto* class_constructor = static_cast<OrdinaryFunctionObject*>(&class_constructor_value.as_function());
class_constructor->set_is_class_constructor();
Value super_constructor = js_undefined();
if (!m_super_class.is_null()) {
super_constructor = m_super_class->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (!super_constructor.is_function() && !super_constructor.is_null()) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::ClassExtendsValueNotAConstructorOrNull, super_constructor.to_string_without_side_effects());
return {};
}
class_constructor->set_constructor_kind(FunctionObject::ConstructorKind::Derived);
Object* super_constructor_prototype = nullptr;
if (!super_constructor.is_null()) {
auto super_constructor_prototype_value = super_constructor.as_object().get(vm.names.prototype);
if (interpreter.exception())
return {};
if (!super_constructor_prototype_value.is_object() && !super_constructor_prototype_value.is_null()) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::ClassExtendsValueInvalidPrototype, super_constructor_prototype_value.to_string_without_side_effects());
return {};
}
if (super_constructor_prototype_value.is_object())
super_constructor_prototype = &super_constructor_prototype_value.as_object();
}
auto* prototype = Object::create(global_object, super_constructor_prototype);
prototype->define_direct_property(vm.names.constructor, class_constructor, 0);
if (interpreter.exception())
return {};
class_constructor->define_direct_property(vm.names.prototype, prototype, Attribute::Writable);
if (interpreter.exception())
return {};
class_constructor->internal_set_prototype_of(super_constructor.is_null() ? global_object.function_prototype() : &super_constructor.as_object());
}
auto class_prototype = class_constructor->get(vm.names.prototype);
if (interpreter.exception())
return {};
if (!class_prototype.is_object()) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::NotAnObject, "Class prototype");
return {};
}
for (const auto& method : m_methods) {
auto method_value = method.execute(interpreter, global_object);
if (interpreter.exception())
return {};
auto& method_function = method_value.as_function();
auto key = method.key().execute(interpreter, global_object);
if (interpreter.exception())
return {};
auto property_key = key.to_property_key(global_object);
if (interpreter.exception())
return {};
auto& target = method.is_static() ? *class_constructor : class_prototype.as_object();
method_function.set_home_object(&target);
switch (method.kind()) {
case ClassMethod::Kind::Method:
target.define_property_or_throw(property_key, { .value = method_value, .writable = true, .enumerable = false, .configurable = true });
break;
case ClassMethod::Kind::Getter:
update_function_name(method_value, String::formatted("get {}", get_function_name(global_object, key)));
target.define_property_or_throw(property_key, { .get = &method_function, .enumerable = true, .configurable = true });
break;
case ClassMethod::Kind::Setter:
update_function_name(method_value, String::formatted("set {}", get_function_name(global_object, key)));
target.define_property_or_throw(property_key, { .set = &method_function, .enumerable = true, .configurable = true });
break;
default:
VERIFY_NOT_REACHED();
}
if (interpreter.exception())
return {};
}
return class_constructor;
}
Value ClassDeclaration::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
Value class_constructor = m_class_expression->execute(interpreter, global_object);
if (interpreter.exception())
return {};
interpreter.lexical_environment()->put_into_environment(m_class_expression->name(), { class_constructor, DeclarationKind::Let });
return {};
}
static void print_indent(int indent)
{
out("{}", String::repeated(' ', indent * 2));
}
void ASTNode::dump(int indent) const
{
print_indent(indent);
outln("{}", class_name());
}
void ScopeNode::dump(int indent) const
{
ASTNode::dump(indent);
if (!m_variables.is_empty()) {
print_indent(indent + 1);
outln("(Variables)");
for (auto& variable : m_variables)
variable.dump(indent + 2);
}
if (!m_children.is_empty()) {
print_indent(indent + 1);
outln("(Children)");
for (auto& child : children())
child.dump(indent + 2);
}
}
void BinaryExpression::dump(int indent) const
{
const char* op_string = nullptr;
switch (m_op) {
case BinaryOp::Addition:
op_string = "+";
break;
case BinaryOp::Subtraction:
op_string = "-";
break;
case BinaryOp::Multiplication:
op_string = "*";
break;
case BinaryOp::Division:
op_string = "/";
break;
case BinaryOp::Modulo:
op_string = "%";
break;
case BinaryOp::Exponentiation:
op_string = "**";
break;
case BinaryOp::TypedEquals:
op_string = "===";
break;
case BinaryOp::TypedInequals:
op_string = "!==";
break;
case BinaryOp::AbstractEquals:
op_string = "==";
break;
case BinaryOp::AbstractInequals:
op_string = "!=";
break;
case BinaryOp::GreaterThan:
op_string = ">";
break;
case BinaryOp::GreaterThanEquals:
op_string = ">=";
break;
case BinaryOp::LessThan:
op_string = "<";
break;
case BinaryOp::LessThanEquals:
op_string = "<=";
break;
case BinaryOp::BitwiseAnd:
op_string = "&";
break;
case BinaryOp::BitwiseOr:
op_string = "|";
break;
case BinaryOp::BitwiseXor:
op_string = "^";
break;
case BinaryOp::LeftShift:
op_string = "<<";
break;
case BinaryOp::RightShift:
op_string = ">>";
break;
case BinaryOp::UnsignedRightShift:
op_string = ">>>";
break;
case BinaryOp::In:
op_string = "in";
break;
case BinaryOp::InstanceOf:
op_string = "instanceof";
break;
}
print_indent(indent);
outln("{}", class_name());
m_lhs->dump(indent + 1);
print_indent(indent + 1);
outln("{}", op_string);
m_rhs->dump(indent + 1);
}
void LogicalExpression::dump(int indent) const
{
const char* op_string = nullptr;
switch (m_op) {
case LogicalOp::And:
op_string = "&&";
break;
case LogicalOp::Or:
op_string = "||";
break;
case LogicalOp::NullishCoalescing:
op_string = "??";
break;
}
print_indent(indent);
outln("{}", class_name());
m_lhs->dump(indent + 1);
print_indent(indent + 1);
outln("{}", op_string);
m_rhs->dump(indent + 1);
}
void UnaryExpression::dump(int indent) const
{
const char* op_string = nullptr;
switch (m_op) {
case UnaryOp::BitwiseNot:
op_string = "~";
break;
case UnaryOp::Not:
op_string = "!";
break;
case UnaryOp::Plus:
op_string = "+";
break;
case UnaryOp::Minus:
op_string = "-";
break;
case UnaryOp::Typeof:
op_string = "typeof ";
break;
case UnaryOp::Void:
op_string = "void ";
break;
case UnaryOp::Delete:
op_string = "delete ";
break;
}
print_indent(indent);
outln("{}", class_name());
print_indent(indent + 1);
outln("{}", op_string);
m_lhs->dump(indent + 1);
}
void CallExpression::dump(int indent) const
{
print_indent(indent);
if (is<NewExpression>(*this))
outln("CallExpression [new]");
else
outln("CallExpression");
m_callee->dump(indent + 1);
for (auto& argument : m_arguments)
argument.value->dump(indent + 1);
}
void SuperCall::dump(int indent) const
{
print_indent(indent);
outln("SuperCall");
for (auto& argument : m_arguments)
argument.value->dump(indent + 1);
}
void ClassDeclaration::dump(int indent) const
{
ASTNode::dump(indent);
m_class_expression->dump(indent + 1);
}
void ClassExpression::dump(int indent) const
{
print_indent(indent);
outln("ClassExpression: \"{}\"", m_name);
print_indent(indent);
outln("(Constructor)");
m_constructor->dump(indent + 1);
if (!m_super_class.is_null()) {
print_indent(indent);
outln("(Super Class)");
m_super_class->dump(indent + 1);
}
print_indent(indent);
outln("(Methods)");
for (auto& method : m_methods)
method.dump(indent + 1);
}
void ClassMethod::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("(Key)");
m_key->dump(indent + 1);
const char* kind_string = nullptr;
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);
outln("Kind: {}", kind_string);
print_indent(indent);
outln("Static: {}", m_is_static);
print_indent(indent);
outln("(Function)");
m_function->dump(indent + 1);
}
void StringLiteral::dump(int indent) const
{
print_indent(indent);
outln("StringLiteral \"{}\"", m_value);
}
void SuperExpression::dump(int indent) const
{
print_indent(indent);
outln("super");
}
void NumericLiteral::dump(int indent) const
{
print_indent(indent);
outln("NumericLiteral {}", m_value);
}
void BigIntLiteral::dump(int indent) const
{
print_indent(indent);
outln("BigIntLiteral {}", m_value);
}
void BooleanLiteral::dump(int indent) const
{
print_indent(indent);
outln("BooleanLiteral {}", m_value);
}
void NullLiteral::dump(int indent) const
{
print_indent(indent);
outln("null");
}
void BindingPattern::dump(int indent) const
{
print_indent(indent);
outln("BindingPattern {}", kind == Kind::Array ? "Array" : "Object");
for (auto& entry : entries) {
print_indent(indent + 1);
outln("(Property)");
if (kind == Kind::Object) {
print_indent(indent + 2);
outln("(Identifier)");
if (entry.name.has<NonnullRefPtr<Identifier>>()) {
entry.name.get<NonnullRefPtr<Identifier>>()->dump(indent + 3);
} else {
entry.name.get<NonnullRefPtr<Expression>>()->dump(indent + 3);
}
} else if (entry.is_elision()) {
print_indent(indent + 2);
outln("(Elision)");
continue;
}
print_indent(indent + 2);
outln("(Pattern{})", entry.is_rest ? " rest=true" : "");
if (entry.alias.has<NonnullRefPtr<Identifier>>()) {
entry.alias.get<NonnullRefPtr<Identifier>>()->dump(indent + 3);
} else if (entry.alias.has<NonnullRefPtr<BindingPattern>>()) {
entry.alias.get<NonnullRefPtr<BindingPattern>>()->dump(indent + 3);
} else {
print_indent(indent + 3);
outln("<empty>");
}
if (entry.initializer) {
print_indent(indent + 2);
outln("(Initializer)");
entry.initializer->dump(indent + 3);
}
}
}
void FunctionNode::dump(int indent, String const& class_name) const
{
print_indent(indent);
outln("{}{} '{}'", class_name, m_kind == FunctionKind::Generator ? "*" : "", name());
if (!m_parameters.is_empty()) {
print_indent(indent + 1);
outln("(Parameters)");
for (auto& parameter : m_parameters) {
print_indent(indent + 2);
if (parameter.is_rest)
out("...");
parameter.binding.visit(
[&](FlyString const& name) {
outln("{}", name);
},
[&](BindingPattern const& pattern) {
pattern.dump(indent + 2);
});
if (parameter.default_value)
parameter.default_value->dump(indent + 3);
}
}
print_indent(indent + 1);
outln("(Body)");
body().dump(indent + 2);
}
void FunctionDeclaration::dump(int indent) const
{
FunctionNode::dump(indent, class_name());
}
void FunctionExpression::dump(int indent) const
{
FunctionNode::dump(indent, class_name());
}
void YieldExpression::dump(int indent) const
{
ASTNode::dump(indent);
if (argument())
argument()->dump(indent + 1);
}
void ReturnStatement::dump(int indent) const
{
ASTNode::dump(indent);
if (argument())
argument()->dump(indent + 1);
}
void IfStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("If");
predicate().dump(indent + 1);
consequent().dump(indent + 1);
if (alternate()) {
print_indent(indent);
outln("Else");
alternate()->dump(indent + 1);
}
}
void WhileStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("While");
test().dump(indent + 1);
body().dump(indent + 1);
}
void WithStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("Object");
object().dump(indent + 2);
print_indent(indent + 1);
outln("Body");
body().dump(indent + 2);
}
void DoWhileStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("DoWhile");
test().dump(indent + 1);
body().dump(indent + 1);
}
void ForStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("For");
if (init())
init()->dump(indent + 1);
if (test())
test()->dump(indent + 1);
if (update())
update()->dump(indent + 1);
body().dump(indent + 1);
}
void ForInStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("ForIn");
lhs().dump(indent + 1);
rhs().dump(indent + 1);
body().dump(indent + 1);
}
void ForOfStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("ForOf");
lhs().dump(indent + 1);
rhs().dump(indent + 1);
body().dump(indent + 1);
}
Value Identifier::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto value = interpreter.vm().get_variable(string(), global_object);
if (interpreter.exception())
return {};
if (value.is_empty()) {
interpreter.vm().throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, string());
return {};
}
return value;
}
void Identifier::dump(int indent) const
{
print_indent(indent);
outln("Identifier \"{}\"", m_string);
}
void SpreadExpression::dump(int indent) const
{
ASTNode::dump(indent);
m_target->dump(indent + 1);
}
Value SpreadExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return m_target->execute(interpreter, global_object);
}
Value ThisExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return interpreter.vm().resolve_this_binding(global_object);
}
void ThisExpression::dump(int indent) const
{
ASTNode::dump(indent);
}
Value AssignmentExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
#define EXECUTE_LHS() \
do { \
if (auto* ptr = m_lhs.get_pointer<NonnullRefPtr<Expression>>()) { \
lhs_result = (*ptr)->execute(interpreter, global_object); \
if (interpreter.exception()) \
return {}; \
} \
} while (0)
#define EXECUTE_LHS_AND_RHS() \
do { \
EXECUTE_LHS(); \
rhs_result = m_rhs->execute(interpreter, global_object); \
if (interpreter.exception()) \
return {}; \
} while (0)
Value lhs_result;
Value rhs_result;
switch (m_op) {
case AssignmentOp::Assignment:
break;
case AssignmentOp::AdditionAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = add(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::SubtractionAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = sub(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::MultiplicationAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = mul(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::DivisionAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = div(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::ModuloAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = mod(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::ExponentiationAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = exp(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::BitwiseAndAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = bitwise_and(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::BitwiseOrAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = bitwise_or(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::BitwiseXorAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = bitwise_xor(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::LeftShiftAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = left_shift(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::RightShiftAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = right_shift(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::UnsignedRightShiftAssignment:
EXECUTE_LHS_AND_RHS();
rhs_result = unsigned_right_shift(global_object, lhs_result, rhs_result);
break;
case AssignmentOp::AndAssignment:
EXECUTE_LHS();
if (!lhs_result.to_boolean())
return lhs_result;
rhs_result = m_rhs->execute(interpreter, global_object);
break;
case AssignmentOp::OrAssignment:
EXECUTE_LHS();
if (lhs_result.to_boolean())
return lhs_result;
rhs_result = m_rhs->execute(interpreter, global_object);
break;
case AssignmentOp::NullishAssignment:
EXECUTE_LHS();
if (!lhs_result.is_nullish())
return lhs_result;
rhs_result = m_rhs->execute(interpreter, global_object);
break;
}
if (interpreter.exception())
return {};
return m_lhs.visit(
[&](NonnullRefPtr<Expression>& lhs) -> JS::Value {
auto reference = lhs->to_reference(interpreter, global_object);
if (interpreter.exception())
return {};
if (m_op == AssignmentOp::Assignment) {
rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
if (reference.is_unresolvable()) {
interpreter.vm().throw_exception<ReferenceError>(global_object, ErrorType::InvalidLeftHandAssignment);
return {};
}
reference.put_value(global_object, rhs_result);
if (interpreter.exception())
return {};
return rhs_result;
},
[&](NonnullRefPtr<BindingPattern>& pattern) -> JS::Value {
VERIFY(m_op == AssignmentOp::Assignment);
rhs_result = m_rhs->execute(interpreter, global_object);
if (interpreter.exception())
return {};
interpreter.vm().assign(pattern, rhs_result, global_object);
if (interpreter.exception())
return {};
return rhs_result;
});
}
Value UpdateExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto reference = m_argument->to_reference(interpreter, global_object);
if (interpreter.exception())
return {};
auto old_value = reference.get_value(global_object);
if (interpreter.exception())
return {};
old_value = old_value.to_numeric(global_object);
if (interpreter.exception())
return {};
Value new_value;
switch (m_op) {
case UpdateOp::Increment:
if (old_value.is_number())
new_value = Value(old_value.as_double() + 1);
else
new_value = js_bigint(interpreter.heap(), old_value.as_bigint().big_integer().plus(Crypto::SignedBigInteger { 1 }));
break;
case UpdateOp::Decrement:
if (old_value.is_number())
new_value = Value(old_value.as_double() - 1);
else
new_value = js_bigint(interpreter.heap(), old_value.as_bigint().big_integer().minus(Crypto::SignedBigInteger { 1 }));
break;
default:
VERIFY_NOT_REACHED();
}
reference.put_value(global_object, new_value);
if (interpreter.exception())
return {};
return m_prefixed ? new_value : old_value;
}
void AssignmentExpression::dump(int indent) const
{
const char* op_string = nullptr;
switch (m_op) {
case AssignmentOp::Assignment:
op_string = "=";
break;
case AssignmentOp::AdditionAssignment:
op_string = "+=";
break;
case AssignmentOp::SubtractionAssignment:
op_string = "-=";
break;
case AssignmentOp::MultiplicationAssignment:
op_string = "*=";
break;
case AssignmentOp::DivisionAssignment:
op_string = "/=";
break;
case AssignmentOp::ModuloAssignment:
op_string = "%=";
break;
case AssignmentOp::ExponentiationAssignment:
op_string = "**=";
break;
case AssignmentOp::BitwiseAndAssignment:
op_string = "&=";
break;
case AssignmentOp::BitwiseOrAssignment:
op_string = "|=";
break;
case AssignmentOp::BitwiseXorAssignment:
op_string = "^=";
break;
case AssignmentOp::LeftShiftAssignment:
op_string = "<<=";
break;
case AssignmentOp::RightShiftAssignment:
op_string = ">>=";
break;
case AssignmentOp::UnsignedRightShiftAssignment:
op_string = ">>>=";
break;
case AssignmentOp::AndAssignment:
op_string = "&&=";
break;
case AssignmentOp::OrAssignment:
op_string = "||=";
break;
case AssignmentOp::NullishAssignment:
op_string = "\?\?=";
break;
}
ASTNode::dump(indent);
print_indent(indent + 1);
outln("{}", op_string);
m_lhs.visit([&](auto& lhs) { lhs->dump(indent + 1); });
m_rhs->dump(indent + 1);
}
void UpdateExpression::dump(int indent) const
{
const char* op_string = nullptr;
switch (m_op) {
case UpdateOp::Increment:
op_string = "++";
break;
case UpdateOp::Decrement:
op_string = "--";
break;
}
ASTNode::dump(indent);
if (m_prefixed) {
print_indent(indent + 1);
outln("{}", op_string);
}
m_argument->dump(indent + 1);
if (!m_prefixed) {
print_indent(indent + 1);
outln("{}", op_string);
}
}
Value VariableDeclaration::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
for (auto& declarator : m_declarations) {
if (auto* init = declarator.init()) {
auto initializer_result = init->execute(interpreter, global_object);
if (interpreter.exception())
return {};
declarator.target().visit(
[&](NonnullRefPtr<Identifier> const& id) {
auto variable_name = id->string();
if (is<ClassExpression>(*init))
update_function_name(initializer_result, variable_name);
interpreter.vm().set_variable(variable_name, initializer_result, global_object, true);
},
[&](NonnullRefPtr<BindingPattern> const& pattern) {
interpreter.vm().assign(pattern, initializer_result, global_object, true);
});
}
}
return {};
}
Value VariableDeclarator::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// NOTE: VariableDeclarator execution is handled by VariableDeclaration.
VERIFY_NOT_REACHED();
}
void VariableDeclaration::dump(int indent) const
{
const char* declaration_kind_string = nullptr;
switch (m_declaration_kind) {
case DeclarationKind::Let:
declaration_kind_string = "Let";
break;
case DeclarationKind::Var:
declaration_kind_string = "Var";
break;
case DeclarationKind::Const:
declaration_kind_string = "Const";
break;
}
ASTNode::dump(indent);
print_indent(indent + 1);
outln("{}", declaration_kind_string);
for (auto& declarator : m_declarations)
declarator.dump(indent + 1);
}
void VariableDeclarator::dump(int indent) const
{
ASTNode::dump(indent);
m_target.visit([indent](const auto& value) { value->dump(indent + 1); });
if (m_init)
m_init->dump(indent + 1);
}
void ObjectProperty::dump(int indent) const
{
ASTNode::dump(indent);
m_key->dump(indent + 1);
m_value->dump(indent + 1);
}
void ObjectExpression::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& property : m_properties) {
property.dump(indent + 1);
}
}
void ExpressionStatement::dump(int indent) const
{
ASTNode::dump(indent);
m_expression->dump(indent + 1);
}
Value ObjectProperty::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// NOTE: ObjectProperty execution is handled by ObjectExpression.
VERIFY_NOT_REACHED();
}
Value ObjectExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto* object = Object::create(global_object, global_object.object_prototype());
for (auto& property : m_properties) {
auto key = property.key().execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (property.type() == ObjectProperty::Type::Spread) {
if (key.is_object() && is<Array>(key.as_object())) {
auto& array_to_spread = static_cast<Array&>(key.as_object());
for (auto& entry : array_to_spread.indexed_properties()) {
auto value = array_to_spread.get(entry.index());
if (interpreter.exception())
return {};
object->indexed_properties().put(entry.index(), value);
if (interpreter.exception())
return {};
}
} else if (key.is_object()) {
auto& obj_to_spread = key.as_object();
for (auto& it : obj_to_spread.shape().property_table_ordered()) {
if (it.value.attributes.is_enumerable()) {
object->define_direct_property(it.key, obj_to_spread.get(it.key), JS::default_attributes);
if (interpreter.exception())
return {};
}
}
} else if (key.is_string()) {
auto& str_to_spread = key.as_string().string();
for (size_t i = 0; i < str_to_spread.length(); i++) {
object->define_direct_property(i, js_string(interpreter.heap(), str_to_spread.substring(i, 1)), JS::default_attributes);
if (interpreter.exception())
return {};
}
}
continue;
}
auto value = property.value().execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (value.is_function() && property.is_method())
value.as_function().set_home_object(object);
String name = get_function_name(global_object, key);
if (property.type() == ObjectProperty::Type::Getter) {
name = String::formatted("get {}", name);
} else if (property.type() == ObjectProperty::Type::Setter) {
name = String::formatted("set {}", name);
}
update_function_name(value, name);
switch (property.type()) {
case ObjectProperty::Type::Getter:
VERIFY(value.is_function());
object->define_direct_accessor(PropertyName::from_value(global_object, key), &value.as_function(), nullptr, Attribute::Configurable | Attribute::Enumerable);
break;
case ObjectProperty::Type::Setter:
VERIFY(value.is_function());
object->define_direct_accessor(PropertyName::from_value(global_object, key), nullptr, &value.as_function(), Attribute::Configurable | Attribute::Enumerable);
break;
case ObjectProperty::Type::KeyValue:
object->define_direct_property(PropertyName::from_value(global_object, key), value, JS::default_attributes);
break;
case ObjectProperty::Type::Spread:
default:
VERIFY_NOT_REACHED();
}
if (interpreter.exception())
return {};
}
return object;
}
void MemberExpression::dump(int indent) const
{
print_indent(indent);
outln("{}(computed={})", class_name(), is_computed());
m_object->dump(indent + 1);
m_property->dump(indent + 1);
}
PropertyName MemberExpression::computed_property_name(Interpreter& interpreter, GlobalObject& global_object) const
{
if (!is_computed())
return verify_cast<Identifier>(*m_property).string();
auto value = m_property->execute(interpreter, global_object);
if (interpreter.exception())
return {};
VERIFY(!value.is_empty());
return PropertyName::from_value(global_object, value);
}
String MemberExpression::to_string_approximation() const
{
String object_string = "<object>";
if (is<Identifier>(*m_object))
object_string = static_cast<Identifier const&>(*m_object).string();
if (is_computed())
return String::formatted("{}[<computed>]", object_string);
return String::formatted("{}.{}", object_string, verify_cast<Identifier>(*m_property).string());
}
Value MemberExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto reference = to_reference(interpreter, global_object);
if (interpreter.exception())
return {};
return reference.get_value(global_object);
}
void MetaProperty::dump(int indent) const
{
String name;
if (m_type == MetaProperty::Type::NewTarget)
name = "new.target";
else if (m_type == MetaProperty::Type::ImportMeta)
name = "import.meta";
else
VERIFY_NOT_REACHED();
print_indent(indent);
outln("{} {}", class_name(), name);
}
Value MetaProperty::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
if (m_type == MetaProperty::Type::NewTarget)
return interpreter.vm().get_new_target().value_or(js_undefined());
if (m_type == MetaProperty::Type::ImportMeta)
TODO();
VERIFY_NOT_REACHED();
}
Value StringLiteral::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return js_string(interpreter.heap(), m_value);
}
Value NumericLiteral::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return Value(m_value);
}
Value BigIntLiteral::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
Crypto::SignedBigInteger integer;
if (m_value[0] == '0' && m_value.length() >= 3) {
if (m_value[1] == 'x' || m_value[1] == 'X') {
return js_bigint(interpreter.heap(), Crypto::SignedBigInteger::from_base(16, m_value.substring(2, m_value.length() - 3)));
} else if (m_value[1] == 'o' || m_value[1] == 'O') {
return js_bigint(interpreter.heap(), Crypto::SignedBigInteger::from_base(8, m_value.substring(2, m_value.length() - 3)));
} else if (m_value[1] == 'b' || m_value[1] == 'B') {
return js_bigint(interpreter.heap(), Crypto::SignedBigInteger::from_base(2, m_value.substring(2, m_value.length() - 3)));
}
}
return js_bigint(interpreter.heap(), Crypto::SignedBigInteger::from_base(10, m_value.substring(0, m_value.length() - 1)));
}
Value BooleanLiteral::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return Value(m_value);
}
Value NullLiteral::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
return js_null();
}
void RegExpLiteral::dump(int indent) const
{
print_indent(indent);
outln("{} (/{}/{})", class_name(), pattern(), flags());
}
Value RegExpLiteral::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
Regex<ECMA262> regex(parsed_regex(), parsed_pattern(), parsed_flags());
return RegExpObject::create(global_object, move(regex), pattern(), flags());
}
void ArrayExpression::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& element : m_elements) {
if (element) {
element->dump(indent + 1);
} else {
print_indent(indent + 1);
outln("<empty>");
}
}
}
Value ArrayExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto* array = Array::create(global_object, 0);
for (auto& element : m_elements) {
auto value = Value();
if (element) {
value = element->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (is<SpreadExpression>(*element)) {
get_iterator_values(global_object, value, [&](Value iterator_value) {
array->indexed_properties().append(iterator_value);
return IterationDecision::Continue;
});
if (interpreter.exception())
return {};
continue;
}
}
array->indexed_properties().append(value);
}
return array;
}
void TemplateLiteral::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& expression : m_expressions)
expression.dump(indent + 1);
}
Value TemplateLiteral::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
StringBuilder string_builder;
for (auto& expression : m_expressions) {
auto expr = expression.execute(interpreter, global_object);
if (interpreter.exception())
return {};
auto string = expr.to_string(global_object);
if (interpreter.exception())
return {};
string_builder.append(string);
}
return js_string(interpreter.heap(), string_builder.build());
}
void TaggedTemplateLiteral::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("(Tag)");
m_tag->dump(indent + 2);
print_indent(indent + 1);
outln("(Template Literal)");
m_template_literal->dump(indent + 2);
}
Value TaggedTemplateLiteral::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto& vm = interpreter.vm();
auto tag = m_tag->execute(interpreter, global_object);
if (vm.exception())
return {};
if (!tag.is_function()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAFunction, tag.to_string_without_side_effects());
return {};
}
auto& tag_function = tag.as_function();
auto& expressions = m_template_literal->expressions();
auto* strings = Array::create(global_object, 0);
MarkedValueList arguments(vm.heap());
arguments.append(strings);
for (size_t i = 0; i < expressions.size(); ++i) {
auto value = expressions[i].execute(interpreter, global_object);
if (vm.exception())
return {};
// tag`${foo}` -> "", foo, "" -> tag(["", ""], foo)
// tag`foo${bar}baz${qux}` -> "foo", bar, "baz", qux, "" -> tag(["foo", "baz", ""], bar, qux)
if (i % 2 == 0) {
strings->indexed_properties().append(value);
} else {
arguments.append(value);
}
}
auto* raw_strings = Array::create(global_object, 0);
for (auto& raw_string : m_template_literal->raw_strings()) {
auto value = raw_string.execute(interpreter, global_object);
if (vm.exception())
return {};
raw_strings->indexed_properties().append(value);
}
strings->define_direct_property(vm.names.raw, raw_strings, 0);
return vm.call(tag_function, js_undefined(), move(arguments));
}
void TryStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent);
outln("(Block)");
block().dump(indent + 1);
if (handler()) {
print_indent(indent);
outln("(Handler)");
handler()->dump(indent + 1);
}
if (finalizer()) {
print_indent(indent);
outln("(Finalizer)");
finalizer()->dump(indent + 1);
}
}
void CatchClause::dump(int indent) const
{
print_indent(indent);
m_parameter.visit(
[&](FlyString const& parameter) {
if (parameter.is_null())
outln("CatchClause");
else
outln("CatchClause ({})", parameter);
},
[&](NonnullRefPtr<BindingPattern> const& pattern) {
outln("CatchClause");
print_indent(indent);
outln("(Parameter)");
pattern->dump(indent + 2);
});
body().dump(indent + 1);
}
void ThrowStatement::dump(int indent) const
{
ASTNode::dump(indent);
argument().dump(indent + 1);
}
Value TryStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto result = interpreter.execute_statement(global_object, m_block, ScopeType::Try);
if (auto* exception = interpreter.exception()) {
if (m_handler) {
interpreter.vm().clear_exception();
HashMap<FlyString, Variable> parameters;
m_handler->parameter().visit(
[&](FlyString const& parameter) {
parameters.set(parameter, Variable { exception->value(), DeclarationKind::Var });
},
[&](NonnullRefPtr<BindingPattern> const& pattern) {
pattern->for_each_bound_name([&](auto& name) {
parameters.set(name, Variable { Value {}, DeclarationKind::Var });
});
});
auto* catch_scope = interpreter.heap().allocate<DeclarativeEnvironment>(global_object, move(parameters), interpreter.vm().running_execution_context().lexical_environment);
TemporaryChange<Environment*> scope_change(interpreter.vm().running_execution_context().lexical_environment, catch_scope);
if (auto* pattern = m_handler->parameter().get_pointer<NonnullRefPtr<BindingPattern>>())
interpreter.vm().assign(*pattern, exception->value(), global_object, true);
if (interpreter.exception())
result = js_undefined();
else
result = interpreter.execute_statement(global_object, m_handler->body());
}
}
if (m_finalizer) {
// Keep, if any, and then clear the current exception so we can
// execute() the finalizer without an exception in our way.
auto* previous_exception = interpreter.exception();
interpreter.vm().clear_exception();
// Remember what scope type we were unwinding to, and temporarily
// clear it as well (e.g. return from handler).
auto unwind_until = interpreter.vm().unwind_until();
interpreter.vm().stop_unwind();
auto finalizer_result = m_finalizer->execute(interpreter, global_object);
if (interpreter.vm().should_unwind()) {
// This was NOT a 'normal' completion (e.g. return from finalizer).
result = finalizer_result;
} else {
// Continue unwinding to whatever we found ourselves unwinding
// to when the finalizer was entered (e.g. return from handler,
// which is unaffected by normal completion from finalizer).
interpreter.vm().unwind(unwind_until);
// If we previously had an exception and the finalizer didn't
// throw a new one, restore the old one.
if (previous_exception && !interpreter.exception())
interpreter.vm().set_exception(*previous_exception);
}
}
return result.value_or(js_undefined());
}
Value CatchClause::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// NOTE: CatchClause execution is handled by TryStatement.
VERIFY_NOT_REACHED();
return {};
}
Value ThrowStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto value = m_argument->execute(interpreter, global_object);
if (interpreter.vm().exception())
return {};
interpreter.vm().throw_exception(global_object, value);
return {};
}
Value SwitchStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto discriminant_result = m_discriminant->execute(interpreter, global_object);
if (interpreter.exception())
return {};
bool falling_through = false;
auto last_value = js_undefined();
for (auto& switch_case : m_cases) {
if (!falling_through && switch_case.test()) {
auto test_result = switch_case.test()->execute(interpreter, global_object);
if (interpreter.exception())
return {};
if (!strict_eq(discriminant_result, test_result))
continue;
}
falling_through = true;
for (auto& statement : switch_case.consequent()) {
auto value = statement.execute(interpreter, global_object);
if (!value.is_empty())
last_value = value;
if (interpreter.exception())
return {};
if (interpreter.vm().should_unwind()) {
if (interpreter.vm().should_unwind_until(ScopeType::Continuable, m_label)) {
// No stop_unwind(), the outer loop will handle that - we just need to break out of the switch/case.
return last_value;
} else if (interpreter.vm().should_unwind_until(ScopeType::Breakable, m_label)) {
interpreter.vm().stop_unwind();
return last_value;
} else {
return last_value;
}
}
}
}
return last_value;
}
Value SwitchCase::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// NOTE: SwitchCase execution is handled by SwitchStatement.
VERIFY_NOT_REACHED();
return {};
}
Value BreakStatement::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
interpreter.vm().unwind(ScopeType::Breakable, m_target_label);
return {};
}
Value ContinueStatement::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
interpreter.vm().unwind(ScopeType::Continuable, m_target_label);
return {};
}
void SwitchStatement::dump(int indent) const
{
ASTNode::dump(indent);
m_discriminant->dump(indent + 1);
for (auto& switch_case : m_cases) {
switch_case.dump(indent + 1);
}
}
void SwitchCase::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
if (m_test) {
outln("(Test)");
m_test->dump(indent + 2);
} else {
outln("(Default)");
}
print_indent(indent + 1);
outln("(Consequent)");
for (auto& statement : m_consequent)
statement.dump(indent + 2);
}
Value ConditionalExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
auto test_result = m_test->execute(interpreter, global_object);
if (interpreter.exception())
return {};
Value result;
if (test_result.to_boolean()) {
result = m_consequent->execute(interpreter, global_object);
} else {
result = m_alternate->execute(interpreter, global_object);
}
if (interpreter.exception())
return {};
return result;
}
void ConditionalExpression::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("(Test)");
m_test->dump(indent + 2);
print_indent(indent + 1);
outln("(Consequent)");
m_consequent->dump(indent + 2);
print_indent(indent + 1);
outln("(Alternate)");
m_alternate->dump(indent + 2);
}
void SequenceExpression::dump(int indent) const
{
ASTNode::dump(indent);
for (auto& expression : m_expressions)
expression.dump(indent + 1);
}
Value SequenceExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
Value last_value;
for (auto& expression : m_expressions) {
last_value = expression.execute(interpreter, global_object);
if (interpreter.exception())
return {};
}
return last_value;
}
Value DebuggerStatement::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
// Sorry, no JavaScript debugger available (yet)!
return {};
}
void ScopeNode::add_variables(NonnullRefPtrVector<VariableDeclaration> variables)
{
m_variables.extend(move(variables));
}
void ScopeNode::add_functions(NonnullRefPtrVector<FunctionDeclaration> functions)
{
m_functions.extend(move(functions));
}
void ScopeNode::add_hoisted_function(NonnullRefPtr<FunctionDeclaration> hoisted_function)
{
m_hoisted_functions.append(hoisted_function);
}
Value ImportStatement::execute(Interpreter& interpreter, GlobalObject&) const
{
InterpreterNodeScope node_scope { interpreter, *this };
dbgln("Modules are not fully supported yet!");
TODO();
return {};
}
Value ExportStatement::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
InterpreterNodeScope node_scope { interpreter, *this };
if (m_statement)
return m_statement->execute(interpreter, global_object);
return {};
}
void ExportStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
outln("(ExportEntries)");
auto string_or_null = [](String const& string) -> String {
if (string.is_empty()) {
return "null";
}
return String::formatted("\"{}\"", string);
};
for (auto& entry : m_entries) {
print_indent(indent + 2);
outln("ModuleRequest: {}, ImportName: {}, LocalName: {}, ExportName: {}", string_or_null(entry.module_request), entry.kind == ExportEntry::ModuleRequest ? string_or_null(entry.local_or_import_name) : "null", entry.kind != ExportEntry::ModuleRequest ? string_or_null(entry.local_or_import_name) : "null", string_or_null(entry.export_name));
}
}
void ImportStatement::dump(int indent) const
{
ASTNode::dump(indent);
print_indent(indent + 1);
if (m_entries.is_empty()) {
// direct from "module" import
outln("Entire module '{}'", m_module_request);
} else {
outln("(ExportEntries) from {}", m_module_request);
for (auto& entry : m_entries) {
print_indent(indent + 2);
outln("ImportName: {}, LocalName: {}", entry.import_name, entry.local_name);
}
}
}
bool ExportStatement::has_export(StringView export_name) const
{
return any_of(m_entries.begin(), m_entries.end(), [&](auto& entry) {
return entry.export_name == export_name;
});
}
bool ImportStatement::has_bound_name(StringView name) const
{
return any_of(m_entries.begin(), m_entries.end(), [&](auto& entry) {
return entry.local_name == name;
});
}
}
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