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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++
/*
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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/String.h>
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#include <LibJS/Heap/Cell.h>
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#include <LibJS/Runtime/Utf16String.h>
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namespace JS {
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class PrimitiveString final : public Cell {
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public:
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explicit PrimitiveString(String);
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explicit PrimitiveString(Utf16String);
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virtual ~PrimitiveString();
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PrimitiveString(PrimitiveString const&) = delete;
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PrimitiveString& operator=(PrimitiveString const&) = delete;
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String const& string() const;
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bool has_utf8_string() const { return m_has_utf8_string; }
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Utf16String const& utf16_string() const;
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Utf16View utf16_string_view() const;
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bool has_utf16_string() const { return m_has_utf16_string; }
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private:
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virtual const char* class_name() const override { return "PrimitiveString"; }
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mutable String m_utf8_string;
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mutable bool m_has_utf8_string { false };
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mutable Utf16String m_utf16_string;
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mutable bool m_has_utf16_string { false };
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};
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PrimitiveString* js_string(Heap&, Utf16View const&);
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PrimitiveString* js_string(VM&, Utf16View const&);
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PrimitiveString* js_string(Heap&, Utf16String);
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PrimitiveString* js_string(VM&, Utf16String);
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PrimitiveString* js_string(Heap&, String);
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PrimitiveString* js_string(VM&, String);
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}
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