5736b53013
The Iterator object cannot be constructed directly but can be subclassed or created with `Iterator.from` (not implemented here).
59 lines
2 KiB
C++
59 lines
2 KiB
C++
/*
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* Copyright (c) 2023, Tim Flynn <trflynn89@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/Intrinsics.h>
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#include <LibJS/Runtime/Iterator.h>
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#include <LibJS/Runtime/IteratorConstructor.h>
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#include <LibJS/Runtime/IteratorPrototype.h>
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#include <LibJS/Runtime/Realm.h>
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#include <LibJS/Runtime/VM.h>
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namespace JS {
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// 3.1.1.1 The Iterator Constructor, https://tc39.es/proposal-iterator-helpers/#sec-iterator-constructor
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IteratorConstructor::IteratorConstructor(Realm& realm)
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: Base(realm.vm().names.Iterator.as_string(), realm.intrinsics().function_prototype())
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{
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}
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ThrowCompletionOr<void> IteratorConstructor::initialize(Realm& realm)
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{
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MUST_OR_THROW_OOM(Base::initialize(realm));
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auto& vm = this->vm();
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// 3.1.1.2.1 Iterator.prototype, https://tc39.es/proposal-iterator-helpers/#sec-iterator.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().iterator_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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// 3.1.1.1.1 Iterator ( ), https://tc39.es/proposal-iterator-helpers/#sec-iterator
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ThrowCompletionOr<Value> IteratorConstructor::call()
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined or the active function object, throw a TypeError exception.
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, "Iterator");
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}
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// 3.1.1.1.1 Iterator ( ), https://tc39.es/proposal-iterator-helpers/#sec-iterator
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ThrowCompletionOr<NonnullGCPtr<Object>> IteratorConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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// 1. If NewTarget is undefined or the active function object, throw a TypeError exception.
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if (&new_target == this)
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return vm.throw_completion<TypeError>(ErrorType::ClassIsAbstract, "Iterator");
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// 2. Return ? OrdinaryCreateFromConstructor(NewTarget, "%Iterator.prototype%").
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return TRY(ordinary_create_from_constructor<Iterator>(vm, new_target, &Intrinsics::iterator_prototype));
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}
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}
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