boost/boost/type_traits/is_union.hpp

   1
   2 // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
   3 // Hinnant & John Maddock 2000.  Permission to copy, use, modify,
   4 // sell and distribute this software is granted provided this
   5 // copyright notice appears in all copies. This software is provided
   6 // "as is" without express or implied warranty, and with no claim as
   7 // to its suitability for any purpose.
   8 //
   9 // See http://www.boost.org for most recent version including documentation.
  10
  11 #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED
  12 #define BOOST_TT_IS_UNION_HPP_INCLUDED
  13
  14 #include "boost/type_traits/remove_cv.hpp"
  15 #include "boost/type_traits/config.hpp"
  16 #include "boost/type_traits/intrinsics.hpp"
  17
  18 // should be the last #include
  19 #include "boost/type_traits/detail/bool_trait_def.hpp"
  20
  21 namespace boost {
  22
  23 namespace detail {
  24 template <typename T> struct is_union_impl
  25 {
  26    typedef typename remove_cv<T>::type cvt;
  27    BOOST_STATIC_CONSTANT(bool, value = BOOST_IS_UNION(cvt));
  28 };
  29 } // namespace detail
  30
  31 BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_union,T,::boost::detail::is_union_impl<T>::value)
  32
  33 } // namespace boost
  34
  35 #include "boost/type_traits/detail/bool_trait_undef.hpp"
  36
  37 #endif // BOOST_TT_IS_UNION_HPP_INCLUDED