b85b8ca350
When appending two strings together to form a new string, if both of the strings are already UTF-16, create the new string as UTF-16 as well. This shaves about 0.5 seconds off the following test262 test: RegExp/property-escapes/generated/General_Category_-_Decimal_Number.js
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/String.h>
|
|
#include <LibJS/Heap/Cell.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; }
|
|
|
|
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);
|
|
|
|
}
|