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| 2 | #ifndef BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED |
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| 3 | #define BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED |
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| 4 | |
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| 5 | // Copyright Eric Friedman 2002 |
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| 6 | // Copyright Aleksey Gurtovoy 2004 |
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| 7 | // |
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| 8 | // Distributed under the Boost Software License, Version 1.0. |
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| 9 | // (See accompanying file LICENSE_1_0.txt or copy at |
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| 10 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 11 | // |
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| 12 | // See http://www.boost.org/libs/mpl for documentation. |
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| 13 | |
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| 14 | // $Source: /cvsroot/boost/boost/boost/mpl/aux_/contains_impl.hpp,v $ |
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| 15 | // $Date: 2004/09/02 15:40:43 $ |
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| 16 | // $Revision: 1.2 $ |
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| 17 | |
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| 18 | #include <boost/mpl/contains_fwd.hpp> |
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| 19 | #include <boost/mpl/begin_end.hpp> |
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| 20 | #include <boost/mpl/find.hpp> |
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| 21 | #include <boost/mpl/not.hpp> |
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| 22 | #include <boost/mpl/aux_/traits_lambda_spec.hpp> |
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| 23 | #include <boost/mpl/aux_/config/forwarding.hpp> |
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| 24 | #include <boost/mpl/aux_/config/static_constant.hpp> |
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| 25 | |
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| 26 | #include <boost/type_traits/is_same.hpp> |
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| 27 | |
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| 28 | namespace boost { namespace mpl { |
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| 29 | |
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| 30 | template< typename Tag > |
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| 31 | struct contains_impl |
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| 32 | { |
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| 33 | template< typename Sequence, typename T > struct apply |
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| 34 | #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
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| 35 | : not_< is_same< |
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| 36 | typename find<Sequence,T>::type |
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| 37 | , typename end<Sequence>::type |
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| 38 | > > |
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| 39 | { |
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| 40 | #else |
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| 41 | { |
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| 42 | typedef not_< is_same< |
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| 43 | typename find<Sequence,T>::type |
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| 44 | , typename end<Sequence>::type |
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| 45 | > > type; |
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| 46 | |
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| 47 | BOOST_STATIC_CONSTANT(bool, value = |
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| 48 | (not_< is_same< |
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| 49 | typename find<Sequence,T>::type |
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| 50 | , typename end<Sequence>::type |
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| 51 | > >::value) |
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| 52 | ); |
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| 53 | #endif |
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| 54 | }; |
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| 55 | }; |
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| 56 | |
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| 57 | BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,contains_impl) |
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| 58 | |
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| 59 | }} |
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| 60 | |
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| 61 | #endif // BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED |
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