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- #ifndef BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
- #define BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
- // Copyright Eric Friedman 2002
- // Copyright Aleksey Gurtovoy 2004
- //
- // Distributed under 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/mpl for documentation.
- // $Id$
- // $Date$
- // $Revision$
- #include <boost/mpl/contains_fwd.hpp>
- #include <boost/mpl/begin_end.hpp>
- #include <boost/mpl/find.hpp>
- #include <boost/mpl/not.hpp>
- #include <boost/mpl/aux_/traits_lambda_spec.hpp>
- #include <boost/mpl/aux_/config/forwarding.hpp>
- #include <boost/mpl/aux_/config/static_constant.hpp>
- #include <boost/type_traits/is_same.hpp>
- namespace boost { namespace mpl {
- template< typename Tag >
- struct contains_impl
- {
- template< typename Sequence, typename T > struct apply
- #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
- : not_< is_same<
- typename find<Sequence,T>::type
- , typename end<Sequence>::type
- > >
- {
- #else
- {
- typedef not_< is_same<
- typename find<Sequence,T>::type
- , typename end<Sequence>::type
- > > type;
- BOOST_STATIC_CONSTANT(bool, value =
- (not_< is_same<
- typename find<Sequence,T>::type
- , typename end<Sequence>::type
- > >::value)
- );
- #endif
- };
- };
- BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,contains_impl)
- }}
- #endif // BOOST_MPL_AUX_CONTAINS_IMPL_HPP_INCLUDED
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