Coverage Report

Created: 2025-03-04 07:22

/src/serenity/Userland/Libraries/LibJS/Runtime/WeakRefConstructor.cpp
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/*
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 * Copyright (c) 2021-2022, 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/AbstractOperations.h>
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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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JS_DEFINE_ALLOCATOR(WeakRefConstructor);
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WeakRefConstructor::WeakRefConstructor(Realm& realm)
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    : NativeFunction(realm.vm().names.WeakRef.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void WeakRefConstructor::initialize(Realm& realm)
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{
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    auto& vm = this->vm();
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    Base::initialize(realm);
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    // 26.1.2.1 WeakRef.prototype, https://tc39.es/ecma262/#sec-weak-ref.prototype
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    define_direct_property(vm.names.prototype, realm.intrinsics().weak_ref_prototype(), 0);
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    define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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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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ThrowCompletionOr<Value> WeakRefConstructor::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.WeakRef);
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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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ThrowCompletionOr<NonnullGCPtr<Object>> WeakRefConstructor::construct(FunctionObject& new_target)
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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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    // 2. If CanBeHeldWeakly(target) is false, throw a TypeError exception.
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    if (!can_be_held_weakly(target))
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        return vm.throw_completion<TypeError>(ErrorType::CannotBeHeldWeakly, target.to_string_without_side_effects());
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    // 3. Let weakRef be ? OrdinaryCreateFromConstructor(NewTarget, "%WeakRef.prototype%", « [[WeakRefTarget]] »).
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    // 4. Perform AddToKeptObjects(target).
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    // 5. Set weakRef.[[WeakRefTarget]] to target.
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    // 6. Return weakRef.
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    if (target.is_object())
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        return TRY(ordinary_create_from_constructor<WeakRef>(vm, new_target, &Intrinsics::weak_ref_prototype, target.as_object()));
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    VERIFY(target.is_symbol());
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    return TRY(ordinary_create_from_constructor<WeakRef>(vm, new_target, &Intrinsics::weak_ref_prototype, target.as_symbol()));
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}
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}