ceph/src/boost/boost/log/detail/is_character_type.hpp

   1 /*
   2  *          Copyright Andrey Semashev 2007 - 2015.
   3  * Distributed under the Boost Software License, Version 1.0.
   4  *    (See accompanying file LICENSE_1_0.txt or copy at
   5  *          http://www.boost.org/LICENSE_1_0.txt)
   6  */
   7 /*!
   8  * \file   is_character_type.hpp
   9  * \author Andrey Semashev
  10  * \date   25.07.2015
  11  *
  12  * The header defines \c is_character_type trait which checks if the type is one of the character types
  13  */
  14
  15 #ifndef BOOST_LOG_DETAIL_IS_CHARACTER_TYPE_HPP_INCLUDED_
  16 #define BOOST_LOG_DETAIL_IS_CHARACTER_TYPE_HPP_INCLUDED_
  17
  18 #include <boost/log/detail/config.hpp>
  19 #include <boost/log/detail/header.hpp>
  20
  21 #ifdef BOOST_HAS_PRAGMA_ONCE
  22 #pragma once
  23 #endif
  24
  25 namespace boost {
  26
  27 BOOST_LOG_OPEN_NAMESPACE
  28
  29 namespace aux {
  30
  31 template< typename T >
  32 struct is_character_type
  33 {
  34     static BOOST_CONSTEXPR_OR_CONST bool value = false;
  35 };
  36
  37 template< >
  38 struct is_character_type< char >
  39 {
  40     static BOOST_CONSTEXPR_OR_CONST bool value = true;
  41 };
  42
  43 template< >
  44 struct is_character_type< wchar_t >
  45 {
  46     static BOOST_CONSTEXPR_OR_CONST bool value = true;
  47 };
  48
  49 #if !defined(BOOST_NO_CXX11_CHAR16_T)
  50 template< >
  51 struct is_character_type< char16_t >
  52 {
  53     static BOOST_CONSTEXPR_OR_CONST bool value = true;
  54 };
  55 #endif
  56
  57 #if !defined(BOOST_NO_CXX11_CHAR32_T)
  58 template< >
  59 struct is_character_type< char32_t >
  60 {
  61     static BOOST_CONSTEXPR_OR_CONST bool value = true;
  62 };
  63 #endif
  64
  65 } // namespace aux
  66
  67 BOOST_LOG_CLOSE_NAMESPACE // namespace log
  68
  69 } // namespace boost
  70
  71 #include <boost/log/detail/footer.hpp>
  72
  73 #endif // BOOST_LOG_DETAIL_IS_CHARACTER_TYPE_HPP_INCLUDED_