text: // Copyright Kevlin Henney, 2000-2005.
  // Copyright Alexander Nasonov, 2006-2010.
  // Copyright Antony Polukhin, 2011-2020.
  //
  // 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
  
  
  #include <boost/type_traits/conditional.hpp>
  
  namespace boost { namespace detail {
  
      template <typename TargetChar, typename SourceChar>
      struct widest_char {
          typedef BOOST_DEDUCED_TYPENAME boost::conditional<
              (sizeof(TargetChar) > sizeof(SourceChar))
              , TargetChar
              , SourceChar
          >::type type;
      };
  
  }} // namespace boost::detail
  
  #endif // BOOST_LEXICAL_CAST_DETAIL_WIDEST_CHAR_HPP
  
  