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8f3a5ba5d8
It relies on a mapper function to convert each T& to a JS::Value. This allows us to avoid awkward Vector<T> to MarkedValueList conversion at the call site.
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Assertions.h>
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#include <AK/Function.h>
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#include <AK/Vector.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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class Array : public Object {
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JS_OBJECT(Array, Object);
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public:
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static Array* create(GlobalObject&, size_t length, Object* prototype = nullptr);
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static Array* create_from(GlobalObject&, Vector<Value> const&);
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// Non-standard but equivalent to CreateArrayFromList.
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template<typename T>
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static Array* create_from(GlobalObject& global_object, Vector<T>& elements, Function<Value(T&)> map_fn)
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{
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auto& vm = global_object.vm();
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auto values = MarkedValueList { global_object.heap() };
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values.ensure_capacity(elements.size());
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for (auto& element : elements) {
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values.append(map_fn(element));
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VERIFY(!vm.exception());
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}
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return Array::create_from(global_object, values);
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}
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explicit Array(Object& prototype);
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virtual ~Array() override;
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virtual Optional<PropertyDescriptor> internal_get_own_property(PropertyName const&) const override;
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virtual bool internal_define_own_property(PropertyName const&, PropertyDescriptor const&) override;
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virtual bool internal_delete(PropertyName const&) override;
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virtual MarkedValueList internal_own_property_keys() const override;
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[[nodiscard]] bool length_is_writable() const { return m_length_writable; };
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private:
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bool set_length(PropertyDescriptor const&);
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bool m_length_writable { true };
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};
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}
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