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// boost cxx11_char_types.hpp --------------------------------------------------------//
// Copyright Beman Dawes 2011
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
//--------------------------------------------------------------------------------------//
// //
// The purpose of this header is to emulate the C++11 char16_t and char32_t //
// character and string types so that they can be used in both C++11 and C++03 //
// programs. //
// //
// The emulation names use char16/char32 rather than char16_t/char32_t to avoid use //
// of names that are keywords in C++11. //
// //
// The emulation names are placed in namespace boost, as is usual for Boost C++11 //
// emulation names such as those in header <boost/cstdint.hpp>. //
// //
// An alternative would would have been to place the C++11 emulation names at global //
// scope, and put the C++11 string types in namespace std. That is the approach taken //
// by Microsoft Visual Studio 2010, but is controversion with some Boost users and //
// developers, and runs counter to usual Boost practice. //
// //
// Thanks to Mathias Gaunard and others for discussions leading to the final form //
// of these typedefs. //
// //
// Boost C++11 C++03 //
// ---------------- -------------- -------------------------------- //
// boost::char16 char16_t uint16_t //
// boost::char32 char32_t uint32_t //
// boost::u16string std::u16string std::basic_string<boost::char16> //
// boost::u32string std::u32string std::basic_string<boost::char32> //
// //
// Uses the typedefs provided by Microsoft Visual C++ 2010 if present //
// //
// Thanks to Mathias Gaunard and others for discussions leading to the final form //
// of these typedefs. //
// //
//--------------------------------------------------------------------------------------//
#if !defined(BOOST_CXX11_CHAR_TYPES_HPP)
# define BOOST_CXX11_CHAR_TYPES_HPP
# include <boost/config.hpp>
# include <boost/cstdint.hpp>
# include <string>
namespace boost
{
# if defined(BOOST_NO_CHAR16_T) && (!defined(_MSC_VER) || _MSC_VER < 1600) // 1600 == VC++10
typedef boost::uint_least16_t char16;
typedef std::basic_string<boost::char16> u16string;
# else
typedef char16_t char16;
typedef std::u16string u16string;
# endif
# if defined(BOOST_NO_CHAR32_T) && (!defined(_MSC_VER) || _MSC_VER < 1600) // 1600 == VC++10
typedef boost::uint_least32_t char32;
typedef std::basic_string<boost::char32> u32string;
# else
typedef char32_t char32;
typedef std::u32string u32string;
# endif
} // namespace boost
#endif // !defined(BOOST_CXX11_CHAR_TYPES_HPP)
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