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5ee810f772
By doing that we avoid lots of `PropertyKey` -> `Value` -> `PropertyKey` transforms, which are quite expensive because of underlying `FlyString` -> `PrimitiveString` -> `FlyString` conversions. 10% improvement on MicroBench/object-keys.js
43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.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 <LibJS/Runtime/Object.h>
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namespace JS {
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class StringObject : public Object {
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JS_OBJECT(StringObject, Object);
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GC_DECLARE_ALLOCATOR(StringObject);
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public:
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[[nodiscard]] static GC::Ref<StringObject> create(Realm&, PrimitiveString&, Object& prototype);
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virtual void initialize(Realm&) override;
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virtual ~StringObject() override = default;
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PrimitiveString const& primitive_string() const { return m_string; }
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PrimitiveString& primitive_string() { return m_string; }
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protected:
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StringObject(PrimitiveString&, Object& prototype);
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private:
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virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
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virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&, Optional<PropertyDescriptor>* precomputed_get_own_property = nullptr) override;
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virtual ThrowCompletionOr<Vector<PropertyKey>> internal_own_property_keys() const override;
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virtual bool is_string_object() const final { return true; }
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virtual void visit_edges(Visitor&) override;
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GC::Ref<PrimitiveString> m_string;
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};
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template<>
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inline bool Object::fast_is<StringObject>() const { return is_string_object(); }
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}
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