// Boost.Bimap
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//
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// Copyright (c) 2006-2007 Matias Capeletto
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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/// \file relation/pair_layout.hpp
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/// \brief Tags for pair layouts
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#ifndef BOOST_BIMAP_RELATION_PAIR_LAYOUT_HPP
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#define BOOST_BIMAP_RELATION_PAIR_LAYOUT_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp>
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namespace boost {
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namespace bimaps {
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namespace relation {
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//@{
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/// \brief Tag for normal layout. ( A,B -> A,B )
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struct normal_layout {};
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/// \brief Tag for mirror layout. ( A,B -> B,A )
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struct mirror_layout {};
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//@}
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/** \struct boost::bimaps::relation::inverse_layout
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\brief Metafunction to obtain the inverse of a layout.
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\code
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template< class Layout >
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struct inverse_layout
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{
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typedef {InverseLayout} type;
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};
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\endcode
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See also normal_layout, mirror_layout.
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**/
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#ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
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template< class Layout >
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struct inverse_layout
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{
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typedef normal_layout type;
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};
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template<>
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struct inverse_layout< normal_layout >
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{
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typedef mirror_layout type;
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};
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#endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
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} // namespace relation
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} // namespace bimaps
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} // namespace boost
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#endif // BOOST_BIMAP_RELATION_DETAIL_PAIR_LAYOUT_HPP
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