Chris@102: // Copyright Kevlin Henney, 2000-2005.
Chris@102: // Copyright Alexander Nasonov, 2006-2010.
Chris@102: // Copyright Antony Polukhin, 2011-2014.
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0. (See
Chris@102: // accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: //
Chris@102: // what:  lexical_cast custom keyword cast
Chris@102: // who:   contributed by Kevlin Henney,
Chris@102: //        enhanced with contributions from Terje Slettebo,
Chris@102: //        with additional fixes and suggestions from Gennaro Prota,
Chris@102: //        Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
Chris@102: //        Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
Chris@102: //        Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
Chris@102: // when:  November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
Chris@102: 
Chris@102: #ifndef BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
Chris@102: #define BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
Chris@102: 
Chris@102: #include <boost/config.hpp>
Chris@102: #ifdef BOOST_HAS_PRAGMA_ONCE
Chris@102: #   pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/type_traits/is_same.hpp>
Chris@102: 
Chris@102: namespace boost {
Chris@102: 
Chris@102:     namespace detail // is_character<...>
Chris@102:     {
Chris@102:         // returns true, if T is one of the character types
Chris@102:         template < typename T >
Chris@102:         struct is_character
Chris@102:         {
Chris@102:             typedef boost::type_traits::ice_or<
Chris@102:                     boost::is_same< T, char >::value,
Chris@102:                     #if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
Chris@102:                         boost::is_same< T, wchar_t >::value,
Chris@102:                     #endif
Chris@102:                     #ifndef BOOST_NO_CXX11_CHAR16_T
Chris@102:                         boost::is_same< T, char16_t >::value,
Chris@102:                     #endif
Chris@102:                     #ifndef BOOST_NO_CXX11_CHAR32_T
Chris@102:                         boost::is_same< T, char32_t >::value,
Chris@102:                     #endif
Chris@102:                     boost::is_same< T, unsigned char >::value,
Chris@102:                     boost::is_same< T, signed char >::value
Chris@102:             > result_type;
Chris@102: 
Chris@102:             BOOST_STATIC_CONSTANT(bool, value = (result_type::value) );
Chris@102:         };
Chris@102:     }
Chris@102: }
Chris@102: 
Chris@102: #endif // BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
Chris@102: