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Diffstat (limited to 'boost/bimap/relation/support/get_pair_functor.hpp')
-rw-r--r-- | boost/bimap/relation/support/get_pair_functor.hpp | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/boost/bimap/relation/support/get_pair_functor.hpp b/boost/bimap/relation/support/get_pair_functor.hpp new file mode 100644 index 0000000000..5f37bf6cfe --- /dev/null +++ b/boost/bimap/relation/support/get_pair_functor.hpp @@ -0,0 +1,85 @@ +// 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 + |