ceph/src/boost/boost/align/detail/integral_constant.hpp

   1 /*
   2 Copyright 2014-2016 Glen Joseph Fernandes
   3 (glenjofe@gmail.com)
   4
   5 Distributed under the Boost Software License, Version 1.0.
   6 (http://www.boost.org/LICENSE_1_0.txt)
   7 */
   8 #ifndef BOOST_ALIGN_DETAIL_INTEGRAL_CONSTANT_HPP
   9 #define BOOST_ALIGN_DETAIL_INTEGRAL_CONSTANT_HPP
  10
  11 #include <boost/config.hpp>
  12
  13 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  14 #include <type_traits>
  15 #endif
  16
  17 namespace boost {
  18 namespace alignment {
  19 namespace detail {
  20
  21 #if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
  22 using std::integral_constant;
  23 #else
  24 template<class T, T Value>
  25 struct integral_constant {
  26     typedef T value_type;
  27     typedef integral_constant type;
  28
  29     BOOST_CONSTEXPR operator value_type() const BOOST_NOEXCEPT {
  30         return Value;
  31     }
  32
  33     BOOST_CONSTEXPR value_type operator()() const BOOST_NOEXCEPT {
  34         return Value;
  35     }
  36
  37     BOOST_STATIC_CONSTEXPR T value = Value;
  38 };
  39
  40 template<class T, T Value>
  41 BOOST_CONSTEXPR_OR_CONST T integral_constant<T, Value>::value;
  42 #endif
  43
  44 } /* detail */
  45 } /* alignment */
  46 } /* boost */
  47
  48 #endif