82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
/*
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* Copyright (C) 2018 Yusuke Suzuki <utatane.tea@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/ASCIICType.h>
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#include <wtf/StdLibExtras.h>
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namespace WTF {
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class PrintStream;
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class ASCIILiteral final {
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public:
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operator const char*() const { return m_characters; }
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static constexpr ASCIILiteral fromLiteralUnsafe(const char* string)
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{
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return ASCIILiteral { string };
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}
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WTF_EXPORT_PRIVATE void dump(PrintStream& out) const;
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static constexpr ASCIILiteral null()
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{
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return ASCIILiteral { nullptr };
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}
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constexpr const char* characters() const { return m_characters; }
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const LChar* characters8() const { return bitwise_cast<const LChar*>(m_characters); }
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size_t length() const { return strlen(m_characters); }
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constexpr char characterAt(unsigned index) const { return m_characters[index]; }
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private:
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constexpr explicit ASCIILiteral(const char* characters) : m_characters(characters) { }
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const char* m_characters;
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};
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inline namespace StringLiterals {
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constexpr ASCIILiteral operator"" _s(const char* characters, size_t n)
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{
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#if ASSERT_ENABLED
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for (size_t i = 0; i < n; ++i)
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ASSERT_UNDER_CONSTEXPR_CONTEXT(isASCII(characters[i]));
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#else
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UNUSED_PARAM(n);
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#endif
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return ASCIILiteral::fromLiteralUnsafe(characters);
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}
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} // inline StringLiterals
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} // namespace WTF
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using namespace WTF::StringLiterals;
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using WTF::ASCIILiteral;
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