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Diffstat (limited to 'boost/cxx11_char_types.hpp')
| -rw-r--r-- | boost/cxx11_char_types.hpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/boost/cxx11_char_types.hpp b/boost/cxx11_char_types.hpp new file mode 100644 index 0000000000..eab46a4649 --- /dev/null +++ b/boost/cxx11_char_types.hpp @@ -0,0 +1,70 @@ +// 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) |