// 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 detail/concept_tags.hpp

/// \brief Bimap tags and concepts



#ifndef BOOST_BIMAP_DETAIL_CONCEPT_TAGS_HPP

#define BOOST_BIMAP_DETAIL_CONCEPT_TAGS_HPP



#if defined(_MSC_VER) && (_MSC_VER>=1200)

#pragma once

#endif



#include <boost/config.hpp>



#include <boost/mpl/identity.hpp>

#include <boost/mpl/placeholders.hpp>

#include <boost/mpl/bool.hpp>



namespace boost {

namespace bimaps {

namespace detail {



/// \brief Tag of {SetType}_of definition classes

/**

The {SetType}_of classes are derived from this class so it is easy to construct

metafunctions. For example now is easy to create a is_set_type_of metafunction.

                                                                                **/



struct set_type_of_tag          {};



/// \brief Tag of {SetType}_of_relation defition classes



struct set_type_of_relation_tag {};



/// \brief Tag of {Side}_based identifiers



struct side_based_tag : set_type_of_relation_tag {};



} // namespace detail





/** \struct boost::bimaps::left_based

    \brief Tag to indicate that the main view will be based on the left side.



This is convenient because the multi-index core will be more efficient.

If possible use this options or the right based one.



See also right_based.

                                                                            **/



/** \struct boost::bimaps::right_based

    \brief Tag to indicate that the main view will be based on the right side.



This is convenient because the multi-index core will be more efficient.

If possible use this options or the right based one.



See also left_based.

                                                                            **/



#ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES



struct left_based : ::boost::bimaps::detail::side_based_tag

{

    // I run into troubles if I do not define bind for side based tags.

    // Maybe a more coherent way of binding the relation can be developped.

    template< class Relation > struct bind_to { typedef void type; };



    typedef mpl::bool_<true>  left_mutable_key;

    typedef mpl::bool_<true> right_mutable_key;

};



struct right_based : ::boost::bimaps::detail::side_based_tag

{

    // I run into troubles if I do not define bind for side based tags.

    // Maybe a more coherent way of binding the relation can be developped.

    template< class Relation > struct bind_to { typedef void type; };



    typedef mpl::bool_<true>  left_mutable_key;

    typedef mpl::bool_<true> right_mutable_key;

};



#endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES



typedef mpl::_ _relation;



} // namespace bimaps

} // namespace boost





#endif // BOOST_BIMAP_DETAIL_CONCEPT_TAGS_HPP



