ceph/src/boost/boost/lexical_cast/detail/widest_char.hpp

   1 // Copyright Kevlin Henney, 2000-2005.
   2 // Copyright Alexander Nasonov, 2006-2010.
   3 // Copyright Antony Polukhin, 2011-2019.
   4 //
   5 // Distributed under the Boost Software License, Version 1.0. (See
   6 // accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9 // what:  lexical_cast custom keyword cast
  10 // who:   contributed by Kevlin Henney,
  11 //        enhanced with contributions from Terje Slettebo,
  12 //        with additional fixes and suggestions from Gennaro Prota,
  13 //        Beman Dawes, Dave Abrahams, Daryle Walker, Peter Dimov,
  14 //        Alexander Nasonov, Antony Polukhin, Justin Viiret, Michael Hofmann,
  15 //        Cheng Yang, Matthew Bradbury, David W. Birdsall, Pavel Korzh and other Boosters
  16 // when:  November 2000, March 2003, June 2005, June 2006, March 2011 - 2014
  17
  18 #ifndef BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
  19 #define BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
  20
  21 #include <boost/config.hpp>
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #   pragma once
  24 #endif
  25
  26
  27 #include <boost/type_traits/conditional.hpp>
  28
  29 namespace boost { namespace detail {
  30
  31     template <typename TargetChar, typename SourceChar>
  32     struct widest_char {
  33         typedef BOOST_DEDUCED_TYPENAME boost::conditional<
  34             (sizeof(TargetChar) > sizeof(SourceChar))
  35             , TargetChar
  36             , SourceChar
  37         >::type type;
  38     };
  39
  40 }} // namespace boost::detail
  41
  42 #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
  43