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_WIDEST_CHAR_HPP
Chris@102: #define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_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: namespace boost { namespace detail {
Chris@102: 
Chris@102:     template <typename TargetChar, typename SourceChar>
Chris@102:     struct widest_char {
Chris@102:         typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c<
Chris@102:             (sizeof(TargetChar) > sizeof(SourceChar))
Chris@102:             , TargetChar
Chris@102:             , SourceChar
Chris@102:         >::type type;
Chris@102:     };
Chris@102: 
Chris@102: }} // namespace boost::detail
Chris@102: 
Chris@102: #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
Chris@102: