| 1 | /* Copyright 2008 Vicente J. Botet Escriba
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| 2 | * Distributed under the Boost Software License, Version 1.0.
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| 3 | * (See accompanying file LICENSE_1_0.txt or copy at
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| 4 | * http://www.boost.org/LICENSE_1_0.txt)
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| 5 | *
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| 6 | * See http://www.boost.org/libs/mpl_ext for library home page.
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| 7 | */
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| 8 |
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| 9 | #ifndef BOOST_MPLEXT_OR_SEQ_HPP_
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| 10 | #define BOOST_MPLEXT_OR_SEQ_HPP_
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| 11 |
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| 12 | #include <boost/mpl/not.hpp>
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| 13 | #include <boost/mpl/find_if.hpp>
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| 14 | #include <boost/mpl/end.hpp>
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| 15 | #include <boost/type_traits/detail/type_trait_def.hpp>
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| 16 |
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| 17 | namespace boost {
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| 18 | namespace mpl_ext {
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| 19 |
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| 20 | /*
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| 21 | Calculate the mlp::or_ of a sequence of nullary logical metafunctions.
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| 22 | */
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| 23 | template <typename Seq>
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| 24 | struct or_seq : mpl::not_<boost::is_same<typename mpl::find_if<Seq, mpl::_>::type,
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| 25 | typename mpl::end<Seq>::type>
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| 26 | > {};
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| 27 |
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| 28 | } // mpl_ext
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| 29 | } // boost
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| 30 | #endif // BOOST_MPLEXT_OR_SEQ_HPP_
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