[857] | 1 |
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| 2 | // (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard
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| 3 | // Hinnant & John Maddock 2000.
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| 4 | // Use, modification and distribution are subject to the Boost Software License,
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| 5 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 6 | // http://www.boost.org/LICENSE_1_0.txt).
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| 7 | //
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| 8 | // See http://www.boost.org/libs/type_traits for most recent version including documentation.
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| 9 |
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| 10 |
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| 11 | #ifndef BOOST_TT_IS_UNION_HPP_INCLUDED
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| 12 | #define BOOST_TT_IS_UNION_HPP_INCLUDED
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| 13 |
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| 14 | #include "boost/type_traits/remove_cv.hpp"
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| 15 | #include "boost/type_traits/config.hpp"
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| 16 | #include "boost/type_traits/intrinsics.hpp"
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| 17 |
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| 18 | // should be the last #include
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| 19 | #include "boost/type_traits/detail/bool_trait_def.hpp"
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| 20 |
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| 21 | namespace boost {
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| 22 |
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| 23 | namespace detail {
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| 24 | #ifndef __GNUC__
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| 25 | template <typename T> struct is_union_impl
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| 26 | {
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| 27 | typedef typename remove_cv<T>::type cvt;
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| 28 | BOOST_STATIC_CONSTANT(bool, value = BOOST_IS_UNION(cvt));
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| 29 | };
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| 30 | #else
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| 31 | //
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| 32 | // using remove_cv here generates a whole load of needless
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| 33 | // warnings with gcc, since it doesn't do any good with gcc
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| 34 | // in any case (at least at present), just remove it:
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| 35 | //
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| 36 | template <typename T> struct is_union_impl
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| 37 | {
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| 38 | BOOST_STATIC_CONSTANT(bool, value = BOOST_IS_UNION(T));
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| 39 | };
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| 40 | #endif
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| 41 | } // namespace detail
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| 42 |
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| 43 | BOOST_TT_AUX_BOOL_TRAIT_DEF1(is_union,T,::boost::detail::is_union_impl<T>::value)
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| 44 |
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| 45 | } // namespace boost
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| 46 |
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| 47 | #include "boost/type_traits/detail/bool_trait_undef.hpp"
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| 48 |
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| 49 | #endif // BOOST_TT_IS_UNION_HPP_INCLUDED
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