| // 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) && (_MSC_VER>=1200) |
| #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 |
| |