1 ///////////////////////////////////////////////////////////////////////////////
4 // Copyright 2008 Eric Niebler. Distributed under the Boost
5 // Software License, Version 1.0. (See accompanying file
6 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
8 #ifndef BOOST_XPRESSIVE_DETAIL_UTILITY_LITERALS_HPP_EAN_10_04_2005
9 #define BOOST_XPRESSIVE_DETAIL_UTILITY_LITERALS_HPP_EAN_10_04_2005
11 // MS compatible compilers support #pragma once
16 #include <boost/config.hpp> // for BOOST_STATIC_CONSTANT
17 #include <boost/cstdint.hpp> // for BOOST_STATIC_CONSTANT
18 #include <boost/detail/workaround.hpp>
20 namespace boost { namespace xpressive { namespace detail
23 ///////////////////////////////////////////////////////////////////////////////
26 template<typename Char, boost::intmax_t Ch, boost::intmax_t Wch>
29 template<typename Char, boost::intmax_t Ch>
30 struct char_literal<Char, Ch, Ch>
32 BOOST_STATIC_CONSTANT(boost::intmax_t, value = Ch);
35 #ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
36 template<typename Char, boost::intmax_t Ch>
37 boost::intmax_t const char_literal<Char, Ch, Ch>::value;
41 struct string_literal;
44 struct string_literal<char>
46 static BOOST_CONSTEXPR char const *pick(char const *cstr, wchar_t const *)
51 static BOOST_CONSTEXPR char pick(char ch, wchar_t)
58 struct string_literal<wchar_t>
60 static BOOST_CONSTEXPR wchar_t const *pick(char const *, wchar_t const *cstr)
65 static BOOST_CONSTEXPR wchar_t pick(char, wchar_t ch)
71 #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3206))
73 # define BOOST_XPR_CHAR_(Char, ch) ch
74 # define BOOST_XPR_CSTR_(Char, st) boost::xpressive::detail::string_literal<Char>::pick(st, L##st)
78 # define BOOST_XPR_CHAR_(Char, ch) boost::xpressive::detail::char_literal<Char, ch, L##ch>::value
79 # define BOOST_XPR_CSTR_(Char, st) boost::xpressive::detail::string_literal<Char>::pick(st, L##st)
83 }}} // namespace boost::xpressive::detail