71 lines
4.1 KiB
C++
71 lines
4.1 KiB
C++
// boost cxx11_char_types.hpp --------------------------------------------------------//
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// Copyright Beman Dawes 2011
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// Distributed under the Boost Software License, Version 1.0.
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// See http://www.boost.org/LICENSE_1_0.txt
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//--------------------------------------------------------------------------------------//
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// //
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// The purpose of this header is to emulate the C++11 char16_t and char32_t //
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// character and string types so that they can be used in both C++11 and C++03 //
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// programs. //
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// //
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// The emulation names use char16/char32 rather than char16_t/char32_t to avoid use //
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// of names that are keywords in C++11. //
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// //
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// The emulation names are placed in namespace boost, as is usual for Boost C++11 //
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// emulation names such as those in header <boost/cstdint.hpp>. //
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// //
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// An alternative would would have been to place the C++11 emulation names at global //
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// scope, and put the C++11 string types in namespace std. That is the approach taken //
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// by Microsoft Visual Studio 2010, but is controversion with some Boost users and //
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// developers, and runs counter to usual Boost practice. //
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// //
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// Thanks to Mathias Gaunard and others for discussions leading to the final form //
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// of these typedefs. //
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// //
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// Boost C++11 C++03 //
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// ---------------- -------------- -------------------------------- //
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// boost::char16 char16_t uint16_t //
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// boost::char32 char32_t uint32_t //
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// boost::u16string std::u16string std::basic_string<boost::char16> //
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// boost::u32string std::u32string std::basic_string<boost::char32> //
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// //
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// Uses the typedefs provided by Microsoft Visual C++ 2010 if present //
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// //
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// Thanks to Mathias Gaunard and others for discussions leading to the final form //
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// of these typedefs. //
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// //
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//--------------------------------------------------------------------------------------//
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#if !defined(BOOST_CXX11_CHAR_TYPES_HPP)
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# define BOOST_CXX11_CHAR_TYPES_HPP
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# include <boost/config.hpp>
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# include <boost/cstdint.hpp>
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# include <string>
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namespace boost
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{
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# if defined(BOOST_NO_CXX11_CHAR16_T) && (!defined(_MSC_VER) || _MSC_VER < 1600) // 1600 == VC++10
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typedef boost::uint_least16_t char16;
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typedef std::basic_string<boost::char16> u16string;
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# else
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typedef char16_t char16;
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typedef std::u16string u16string;
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# endif
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# if defined(BOOST_NO_CXX11_CHAR32_T) && (!defined(_MSC_VER) || _MSC_VER < 1600) // 1600 == VC++10
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typedef boost::uint_least32_t char32;
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typedef std::basic_string<boost::char32> u32string;
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# else
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typedef char32_t char32;
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typedef std::u32string u32string;
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# endif
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} // namespace boost
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#endif // !defined(BOOST_CXX11_CHAR_TYPES_HPP)
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