ceph/src/boost/libs/type_traits/include/boost/type_traits/is_union.hpp

   1
   2 //  (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
   3 //  Hinnant & John Maddock 2000.
   4 //  Use, modification and distribution are subject to the Boost Software License,
   5 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt).
   7 //
   8 //  See http://www.boost.org/libs/type_traits for most recent version including documentation.
   9
  10
  11 #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED
  12 #define BOOST_TT_IS_UNION_HPP_INCLUDED
  13
  14 #include <boost/type_traits/intrinsics.hpp>
  15 #include <boost/type_traits/integral_constant.hpp>
  16
  17 namespace boost {
  18
  19 #ifdef BOOST_IS_UNION
  20 template <class T> struct is_union : public integral_constant<bool, BOOST_IS_UNION(T)> {};
  21 #else
  22 template <class T> struct is_union : public integral_constant<bool, false> {};
  23 #endif
  24
  25 template <class T> struct is_union<T const> : public is_union<T>{};
  26 template <class T> struct is_union<T volatile const> : public is_union<T>{};
  27 template <class T> struct is_union<T volatile> : public is_union<T>{};
  28
  29 } // namespace boost
  30
  31 #endif // BOOST_TT_IS_UNION_HPP_INCLUDED