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https://github.com/RGBCube/serenity
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b84f8fb55b
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).
52 lines
2 KiB
C++
52 lines
2 KiB
C++
/*
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* Copyright (c) 2022, David Tuin <davidot@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/AbstractOperations.h>
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#include <LibJS/Runtime/DisposableStack.h>
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#include <LibJS/Runtime/DisposableStackConstructor.h>
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namespace JS {
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DisposableStackConstructor::DisposableStackConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.DisposableStack.as_string(), realm.intrinsics().function_prototype())
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{
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}
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ThrowCompletionOr<void> DisposableStackConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
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// 26.2.2.1 DisposableStack.prototype, https://tc39.es/ecma262/#sec-finalization-registry.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().disposable_stack_prototype(), 0);
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define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
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return {};
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}
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// 11.3.1.1 DisposableStack ( ), https://tc39.es/proposal-explicit-resource-management/#sec-disposablestack
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ThrowCompletionOr<Value> DisposableStackConstructor::call()
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined, throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.DisposableStack);
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}
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// 11.3.1.1 DisposableStack ( ), https://tc39.es/proposal-explicit-resource-management/#sec-disposablestack
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ThrowCompletionOr<NonnullGCPtr<Object>> DisposableStackConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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// 2. Let disposableStack be ? OrdinaryCreateFromConstructor(NewTarget, "%DisposableStack.prototype%", « [[DisposableState]], [[DisposableResourceStack]] »).
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// 3. Set disposableStack.[[DisposableState]] to pending.
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// 4. Set disposableStack.[[DisposableResourceStack]] to a new empty List.
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// 5. Return disposableStack.
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return TRY(ordinary_create_from_constructor<DisposableStack>(vm, new_target, &Intrinsics::disposable_stack_prototype, Vector<DisposableResource> {}));
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}
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}
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