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- // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
- // Hinnant & John Maddock 2000.
- // Use, modification and distribution are subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt).
- //
- // See http://www.boost.org/libs/type_traits for most recent version including documentation.
- #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED
- #define BOOST_TT_IS_UNION_HPP_INCLUDED
- #include <boost/type_traits/intrinsics.hpp>
- #include <boost/type_traits/integral_constant.hpp>
- namespace boost {
- #ifdef BOOST_IS_UNION
- template <class T> struct is_union : public integral_constant<bool, BOOST_IS_UNION(T)> {};
- #else
- template <class T> struct is_union : public integral_constant<bool, false> {};
- #endif
- template <class T> struct is_union<T const> : public is_union<T>{};
- template <class T> struct is_union<T volatile const> : public is_union<T>{};
- template <class T> struct is_union<T volatile> : public is_union<T>{};
- } // namespace boost
- #endif // BOOST_TT_IS_UNION_HPP_INCLUDED
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