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- // Boost.Bimap
- //
- // Copyright (c) 2006-2007 Matias Capeletto
- //
- // 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)
- /// \file relation/support/get_pair_functor.hpp
- /// \brief get_pair_functor definition
- #ifndef BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP
- #define BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/config.hpp>
- #include <boost/bimap/relation/support/pair_by.hpp>
- namespace boost {
- namespace bimaps {
- namespace relation {
- namespace support {
- /// \brief A Functor that takes a relation as a parameter an return the desired view.
- /**
- This functor is included to help users of the relation class when using
- stl algorithms.
- See also member_at, pair_by().
- \ingroup relation_group
- **/
- template< class Tag, class Relation >
- struct get_pair_functor
- {
- BOOST_DEDUCED_TYPENAME result_of::pair_by<Tag,Relation>::type
- operator()( Relation & r ) const
- {
- return pair_by<Tag>(r);
- }
- BOOST_DEDUCED_TYPENAME result_of::pair_by<Tag,const Relation>::type
- operator()( const Relation & r ) const
- {
- return pair_by<Tag>(r);
- }
- };
- /// \brief A Functor that takes a relation as a parameter an return the above view.
- /**
- \ingroup relation_group
- **/
- template< class Relation >
- struct get_above_view_functor
- {
- BOOST_DEDUCED_TYPENAME Relation::above_view &
- operator()( Relation & r ) const
- {
- return r.get_view();
- }
- const BOOST_DEDUCED_TYPENAME Relation::above_view &
- operator()( const Relation & r ) const
- {
- return r.get_view();
- }
- };
- } // namespace support
- } // namespace relation
- } // namespace bimaps
- } // namespace boost
- #endif // BOOST_BIMAP_RELATION_SUPPORT_GET_PAIR_FUNCTOR_HPP
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