| // Copyright Kevlin Henney, 2000-2005. |
| // Copyright Alexander Nasonov, 2006-2010. |
| // Copyright Antony Polukhin, 2011-2014. |
| // |
| // Distributed under the Boost Software License, Version 1.0. (See |
| // accompanying file LICENSE_1_0.txt or copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // |
| // what: lexical_cast custom keyword cast |
| // who: contributed by Kevlin Henney, |
| // enhanced with contributions from Terje Slettebo, |
| // with additional fixes and suggestions from Gennaro Prota, |
| // Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov, |
| // Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann, |
| // Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters |
| // when: November 2000, March 2003, June 2005, June 2006, March 2011 - 2014 |
| |
| #ifndef BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP |
| #define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP |
| |
| #include <boost/config.hpp> |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| # pragma once |
| #endif |
| |
| namespace boost { namespace detail { |
| |
| template <typename TargetChar, typename SourceChar> |
| struct widest_char { |
| typedef BOOST_DEDUCED_TYPENAME boost::mpl::if_c< |
| (sizeof(TargetChar) > sizeof(SourceChar)) |
| , TargetChar |
| , SourceChar |
| >::type type; |
| }; |
| |
| }} // namespace boost::detail |
| |
| #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP |
| |
