d1cc67bbe1
When performing GetValue on a primitive type we do not need to perform the ToObject conversion as it will resolve to a property on the prototype object. To avoid this we skip the initial ToObject conversion on the base value as it only serves to get the primitive's boxed prototype. We further specialize on PrimitiveString in order to get efficient behaviour behaviour for the direct properties. Depending on the tests anywhere from 20 to 60%, with significant loop overhead.
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/String.h>
|
|
#include <LibJS/Forward.h>
|
|
#include <LibJS/Heap/Cell.h>
|
|
#include <LibJS/Runtime/Value.h>
|
|
#include <LibJS/Runtime/Utf16String.h>
|
|
|
|
namespace JS {
|
|
|
|
class PrimitiveString final : public Cell {
|
|
public:
|
|
explicit PrimitiveString(String);
|
|
explicit PrimitiveString(Utf16String);
|
|
virtual ~PrimitiveString();
|
|
|
|
PrimitiveString(PrimitiveString const&) = delete;
|
|
PrimitiveString& operator=(PrimitiveString const&) = delete;
|
|
|
|
String const& string() const;
|
|
bool has_utf8_string() const { return m_has_utf8_string; }
|
|
|
|
Utf16String const& utf16_string() const;
|
|
Utf16View utf16_string_view() const;
|
|
bool has_utf16_string() const { return m_has_utf16_string; }
|
|
|
|
Optional<Value> get(GlobalObject&, PropertyKey const&) const;
|
|
private:
|
|
virtual const char* class_name() const override { return "PrimitiveString"; }
|
|
|
|
mutable String m_utf8_string;
|
|
mutable bool m_has_utf8_string { false };
|
|
|
|
mutable Utf16String m_utf16_string;
|
|
mutable bool m_has_utf16_string { false };
|
|
};
|
|
|
|
PrimitiveString* js_string(Heap&, Utf16View const&);
|
|
PrimitiveString* js_string(VM&, Utf16View const&);
|
|
|
|
PrimitiveString* js_string(Heap&, Utf16String);
|
|
PrimitiveString* js_string(VM&, Utf16String);
|
|
|
|
PrimitiveString* js_string(Heap&, String);
|
|
PrimitiveString* js_string(VM&, String);
|
|
|
|
}
|