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LibJS: Add the WeakRef built-in object

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Idan Horowitz 2021-06-12 17:38:34 +03:00 • committed by Linus Groh
parent 6913f06b6f
commit 7eba63a8a3
12 changed files with 268 additions and 1 deletions
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52
Userland/Libraries/LibJS/Runtime/WeakRefConstructor.cpp Normal file
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/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/WeakRef.h>
#include <LibJS/Runtime/WeakRefConstructor.h>
namespace JS {
WeakRefConstructor::WeakRefConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.WeakRef, *global_object.function_prototype())
{
}
void WeakRefConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
define_property(vm.names.prototype, global_object.weak_ref_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
}
WeakRefConstructor::~WeakRefConstructor()
{
}
Value WeakRefConstructor::call()
{
auto& vm = this->vm();
vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.WeakRef);
return {};
}
// 26.1.1.1 WeakRef ( target ), https://tc39.es/ecma262/#sec-weak-ref-target
Value WeakRefConstructor::construct(Function&)
{
auto& vm = this->vm();
auto target = vm.argument(0);
if (!target.is_object()) {
vm.throw_exception<TypeError>(global_object(), ErrorType::NotAnObject, target.to_string_without_side_effects());
return {};
}
// FIXME: Use OrdinaryCreateFromConstructor(newTarget, "%WeakRef.prototype%")
return WeakRef::create(global_object(), &target.as_object());
}
}