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).
8 // See http://www.boost.org/libs/type_traits for most recent version including documentation.
11 #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED
12 #define BOOST_TT_IS_UNION_HPP_INCLUDED
14 #include <boost/type_traits/intrinsics.hpp>
15 #include <boost/type_traits/integral_constant.hpp>
20 template <class T> struct is_union : public integral_constant<bool, BOOST_IS_UNION(T)> {};
22 template <class T> struct is_union : public integral_constant<bool, false> {};
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>{};
31 #endif // BOOST_TT_IS_UNION_HPP_INCLUDED