1// 2// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh) 3// 4// Distributed under the Boost Software License, Version 1.0. (See 5// accompanying file LICENSE_1_0.txt or copy at 6// http://www.boost.org/LICENSE_1_0.txt) 7// 8 9// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4 filetype=cpp.doxygen 10/*! 11\page status_of_cpp0x_characters_support Status of C++11 char16_t/char32_t support 12 13The support of C++11 \c char16_t and \c char32_t is experimental, mostly does not work and not 14intended to be used in production with current latest compilers: GCC-4.5, MSVC10 till major 15compiler's flaws would be fixed. 16 17\section status_of_cpp0x_characters_support_gnu GNU GCC 4.5/C++11 Status 18 19GNU C++ compiler provides decent support of C++11 characters however: 20 21-# Standard library does not install any std::locale::facets for this support so any attempt 22 to format numbers using \c char16_t or \c char32_t streams would just fail. 23-# Standard library misses specialization for required \c char16_t/char32_t locale facets, 24 so "std" backends is not build-able as essential symbols missing, also \c codecvt facet 25 can't be created as well. 26 27\section status_of_cpp0x_characters_support_msvc Visual Studio 2010 (MSVC10)/C++11 Status 28 29MSVC provides all required facets however: 30 31-# Standard library does not provide installations of std::locale::id for these facets 32 in DLL so it is not usable with \c /MD, \c /MDd compiler flags and requires static link of the runtime 33 library. 34-# \c char16_t and \c char32_t are not distinct types but rather aliases of unsigned short and unsigned 35 types which contradicts to C++11 requirements making it impossible to write \c char16_t/char32_t to stream 36 and causing multiple faults. 37 38If you want to build or test Boost.Locale with C++11 char16_t and char32_t support you should pass `cxxflags="-DBOOST_LOCALE_ENABLE_CHAR32_T -DBOOST_LOCALE_ENABLE_CHAR16_T"` to `b2` during build and define `BOOST_LOCALE_ENABLE_CHAR32_T` and `BOOST_LOCALE_ENABLE_CHAR32_T` when using Boost.Locale 39 40*/ 41 42