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LibJS: Add the WeakRef built-in object
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12 changed files with 268 additions and 1 deletions
52
Userland/Libraries/LibJS/Runtime/WeakRefConstructor.cpp
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52
Userland/Libraries/LibJS/Runtime/WeakRefConstructor.cpp
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/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@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/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/WeakRef.h>
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#include <LibJS/Runtime/WeakRefConstructor.h>
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namespace JS {
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WeakRefConstructor::WeakRefConstructor(GlobalObject& global_object)
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: NativeFunction(vm().names.WeakRef, *global_object.function_prototype())
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{
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}
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void WeakRefConstructor::initialize(GlobalObject& global_object)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(global_object);
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define_property(vm.names.prototype, global_object.weak_ref_prototype(), 0);
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define_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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WeakRefConstructor::~WeakRefConstructor()
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{
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}
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Value WeakRefConstructor::call()
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{
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auto& vm = this->vm();
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vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.WeakRef);
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return {};
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}
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// 26.1.1.1 WeakRef ( target ), https://tc39.es/ecma262/#sec-weak-ref-target
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Value WeakRefConstructor::construct(Function&)
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{
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auto& vm = this->vm();
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auto target = vm.argument(0);
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if (!target.is_object()) {
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vm.throw_exception<TypeError>(global_object(), ErrorType::NotAnObject, target.to_string_without_side_effects());
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return {};
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}
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// FIXME: Use OrdinaryCreateFromConstructor(newTarget, "%WeakRef.prototype%")
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return WeakRef::create(global_object(), &target.as_object());
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}
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}
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