boost/bimap/relation/support/opposite_tag.hpp
// 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/opposite_tag.hpp
/// \brief Metafunction to obtain the opposite tag in a relation.
#ifndef BOOST_BIMAP_RELATION_SUPPORT_OPPOSITE_TAG_HPP
#define BOOST_BIMAP_RELATION_SUPPORT_OPPOSITE_TAG_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/config.hpp>
#include <boost/bimap/relation/detail/metadata_access_builder.hpp>
/** \struct boost::bimaps::relation::support::opposite_tag
\brief Metafunction to obtain the opposite tag in a relation.
\code
template< class Tag, class Relation >
struct opposite_tag
{
typedef {OppositeTag} type;
};
\endcode
\ingroup relation_group
**/
namespace boost {
namespace bimaps {
namespace relation {
namespace support {
// Implementation of const pair reference type by metafunction
BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER
(
opossite_tag,
right_tag,
left_tag
)
} // namespace support
} // namespace relation
} // namespace bimaps
} // namespace boost
#endif // BOOST_BIMAP_RELATION_SUPPORT_OPPOSITE_TAG_HPP