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