// 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/pair_layout.hpp /// \brief Tags for pair layouts #ifndef BOOST_BIMAP_RELATION_PAIR_LAYOUT_HPP #define BOOST_BIMAP_RELATION_PAIR_LAYOUT_HPP #if defined(_MSC_VER) #pragma once #endif #include <boost/config.hpp> namespace boost { namespace bimaps { namespace relation { //@{ /// \brief Tag for normal layout. ( A,B -> A,B ) struct normal_layout {}; /// \brief Tag for mirror layout. ( A,B -> B,A ) struct mirror_layout {}; //@} /** \struct boost::bimaps::relation::inverse_layout \brief Metafunction to obtain the inverse of a layout. \code template< class Layout > struct inverse_layout { typedef {InverseLayout} type; }; \endcode See also normal_layout, mirror_layout. **/ #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES template< class Layout > struct inverse_layout { typedef normal_layout type; }; template<> struct inverse_layout< normal_layout > { typedef mirror_layout type; }; #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES } // namespace relation } // namespace bimaps } // namespace boost #endif // BOOST_BIMAP_RELATION_DETAIL_PAIR_LAYOUT_HPP