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https://github.com/LadybirdBrowser/ladybird.git
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f3117d46dc
This is a continuation of the previous five commits. A first big step into the direction of no longer having to pass a realm (or currently, a global object) trough layers upon layers of AOs! Unlike the create() APIs we can safely assume that this is only ever called when a running execution context and therefore current realm exists. If not, you can always manually allocate the Error and put it in a Completion :^) In the spec, throw exceptions implicitly use the current realm's intrinsics as well: https://tc39.es/ecma262/#sec-throw-an-exception
63 lines
2.8 KiB
C++
63 lines
2.8 KiB
C++
/*
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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/AbstractOperations.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/FinalizationRegistry.h>
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#include <LibJS/Runtime/FinalizationRegistryConstructor.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/JobCallback.h>
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namespace JS {
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FinalizationRegistryConstructor::FinalizationRegistryConstructor(Realm& realm)
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: NativeFunction(vm().names.FinalizationRegistry.as_string(), *realm.global_object().function_prototype())
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{
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}
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void FinalizationRegistryConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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NativeFunction::initialize(realm);
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// 26.2.2.1 FinalizationRegistry.prototype, https://tc39.es/ecma262/#sec-finalization-registry.prototype
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define_direct_property(vm.names.prototype, realm.global_object().finalization_registry_prototype(), 0);
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback
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ThrowCompletionOr<Value> FinalizationRegistryConstructor::call()
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{
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auto& vm = this->vm();
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.FinalizationRegistry);
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}
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// 26.2.1.1 FinalizationRegistry ( cleanupCallback ), https://tc39.es/ecma262/#sec-finalization-registry-cleanup-callback
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ThrowCompletionOr<Object*> FinalizationRegistryConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto& global_object = this->global_object();
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// NOTE: Step 1 is implemented in FinalizationRegistryConstructor::call()
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// 2. If IsCallable(cleanupCallback) is false, throw a TypeError exception.
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auto cleanup_callback = vm.argument(0);
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if (!cleanup_callback.is_function())
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return vm.throw_completion<TypeError>(ErrorType::NotAFunction, cleanup_callback.to_string_without_side_effects());
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// 3. Let finalizationRegistry be ? OrdinaryCreateFromConstructor(NewTarget, "%FinalizationRegistry.prototype%", « [[Realm]], [[CleanupCallback]], [[Cells]] »).
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// 4. Let fn be the active function object.
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// NOTE: This is not necessary, the active function object is `this`.
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// 5. Set finalizationRegistry.[[Realm]] to fn.[[Realm]].
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// 6. Set finalizationRegistry.[[CleanupCallback]] to HostMakeJobCallback(cleanupCallback).
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// 7. Set finalizationRegistry.[[Cells]] to a new empty List.
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// NOTE: This is done inside FinalizationRegistry instead of here.
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// 8. Return finalizationRegistry.
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return TRY(ordinary_create_from_constructor<FinalizationRegistry>(global_object, new_target, &GlobalObject::finalization_registry_prototype, *realm(), vm.host_make_job_callback(cleanup_callback.as_function())));
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}
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}
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