c04476f09d
This is required for %IteratorHelperPrototype%.return, which needs to operate on the internal slots of the base GeneratorObject. Doing so also provides us with the appropriate VM to be used in invocations to the overridden IteratorHelper::execute.
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/IteratorHelper.h>
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#include <LibJS/Runtime/IteratorOperations.h>
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#include <LibJS/Runtime/Realm.h>
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namespace JS {
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ThrowCompletionOr<NonnullGCPtr<IteratorHelper>> IteratorHelper::create(Realm& realm, IteratorRecord underlying_iterator, Closure closure)
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{
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return TRY(realm.heap().allocate<IteratorHelper>(realm, realm, realm.intrinsics().iterator_helper_prototype(), move(underlying_iterator), move(closure)));
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}
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IteratorHelper::IteratorHelper(Realm& realm, Object& prototype, IteratorRecord underlying_iterator, Closure closure)
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: GeneratorObject(realm, prototype, realm.vm().running_execution_context().copy(), "Iterator Helper"sv)
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, m_underlying_iterator(move(underlying_iterator))
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, m_closure(move(closure))
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{
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}
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void IteratorHelper::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_underlying_iterator.iterator);
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}
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Value IteratorHelper::result(Value value)
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{
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set_generator_state(value.is_undefined() ? GeneratorState::Completed : GeneratorState::SuspendedYield);
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return value;
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}
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ThrowCompletionOr<Value> IteratorHelper::close_result(VM& vm, Completion completion)
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{
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set_generator_state(GeneratorState::Completed);
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return *TRY(iterator_close(vm, underlying_iterator(), move(completion)));
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}
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ThrowCompletionOr<Value> IteratorHelper::execute(VM& vm, JS::Completion const&)
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{
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ScopeGuard guard { [&] { vm.pop_execution_context(); } };
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auto result_value = m_closure(vm, *this);
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if (result_value.is_throw_completion()) {
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set_generator_state(GeneratorState::Completed);
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return result_value;
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}
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return create_iterator_result_object(vm, result(result_value.release_value()), generator_state() == GeneratorState::Completed);
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}
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}
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