ceph/src/boost/boost/lexical_cast/detail/is_character.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_IS_CHARACTER_HPP
  19 #define BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
  20
  21 #include <boost/config.hpp>
  22 #ifdef BOOST_HAS_PRAGMA_ONCE
  23 #   pragma once
  24 #endif
  25
  26 #include <boost/type_traits/integral_constant.hpp>
  27 #include <boost/type_traits/is_same.hpp>
  28
  29 namespace boost {
  30
  31     namespace detail // is_character<...>
  32     {
  33         // returns true, if T is one of the character types
  34         template < typename T >
  35         struct is_character
  36         {
  37             typedef BOOST_DEDUCED_TYPENAME boost::integral_constant<
  38               bool,
  39               boost::is_same< T, char >::value ||
  40                     #if !defined(BOOST_NO_STRINGSTREAM) && !defined(BOOST_NO_STD_WSTRING)
  41                         boost::is_same< T, wchar_t >::value ||
  42                     #endif
  43                     #ifndef BOOST_NO_CXX11_CHAR16_T
  44                         boost::is_same< T, char16_t >::value ||
  45                     #endif
  46                     #ifndef BOOST_NO_CXX11_CHAR32_T
  47                         boost::is_same< T, char32_t >::value ||
  48                     #endif
  49                         boost::is_same< T, unsigned char >::value ||
  50                         boost::is_same< T, signed char >::value
  51             > type;
  52
  53             BOOST_STATIC_CONSTANT(bool, value = (type::value) );
  54         };
  55     }
  56 }
  57
  58 #endif // BOOST_LEXICAL_CAST_DETAIL_IS_CHARACTER_HPP
  59