Chris@16: // Boost.Bimap
Chris@16: //
Chris@16: // Copyright (c) 2006-2007 Matias Capeletto
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0.
Chris@16: // (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: /// \file relation/support/get.hpp
Chris@16: /// \brief get<tag>(r) function
Chris@16: 
Chris@16: #ifndef BOOST_BIMAP_RELATION_SUPPORT_GET_HPP
Chris@16: #define BOOST_BIMAP_RELATION_SUPPORT_GET_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: 
Chris@16: #include <boost/bimap/relation/support/value_type_of.hpp>
Chris@16: 
Chris@16: #include <boost/bimap/relation/detail/access_builder.hpp>
Chris@16: 
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/type_traits/is_same.hpp>
Chris@16: #include <boost/type_traits/is_const.hpp>
Chris@16: 
Chris@16: #ifdef BOOST_BIMAP_ONLY_DOXYGEN_WILL_PROCESS_THE_FOLLOWING_LINES
Chris@16: 
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace bimaps {
Chris@16: namespace relation {
Chris@16: namespace support {
Chris@16: 
Chris@16: /** \brief Gets a pair view of the relation.
Chris@16: 
Chris@16: \ingroup relation_group
Chris@16:                                                                         **/
Chris@16: 
Chris@16: template< class Tag, class SymmetricType >
Chris@16: BOOST_DEDUCED_TYPENAME result_of::get<Tag,SymmetricType>::type
Chris@16:     get( SymmetricType & );
Chris@16: 
Chris@16: } // namespace support
Chris@16: } // namespace relation
Chris@16: } // namespace bimaps
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_BIMAP_ONLY_DOXYGEN_WILL_PROCESS_THE_FOLLOWING_LINES
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: #ifndef BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
Chris@16: 
Chris@16: namespace boost {
Chris@16: namespace bimaps {
Chris@16: namespace relation {
Chris@16: namespace support {
Chris@16: 
Chris@16: // Since it is very error-prone to directly write the hole bunch
Chris@16: // of relation accesor. They are buil from litle macro blocks that
Chris@16: // are both more readable, leading to self docummenting code and a
Chris@16: // lot more easier to understand and mantain.
Chris@16: // It is very important to note that the three building blocks have
Chris@16: // to laid in the same namespace in order to work. There is also
Chris@16: // important to keep them in order.
Chris@16: // The forward declaration are not necesary but they help a lot to
Chris@16: // the reader, as they undercover what is the signature of the
Chris@16: // result code.
Chris@16: // In the end, it is not quicker to do it in this way because you
Chris@16: // write a lot. But this code has no complexity at all and almost
Chris@16: // every word writed is for documentation.
Chris@16: 
Chris@16: // Result of
Chris@16: // -------------------------------------------------------------------------
Chris@16: /*
Chris@16:     namespace result_of {
Chris@16: 
Chris@16:     template< class Tag, class Relation >
Chris@16:     struct get<Tag,Relation>;
Chris@16:     {
Chris@16:         typedef -unspecified- type;
Chris@16:     };
Chris@16: 
Chris@16:     } // namespace result_of
Chris@16: 
Chris@16: */
Chris@16: 
Chris@16: BOOST_BIMAP_SYMMETRIC_ACCESS_RESULT_OF_BUILDER
Chris@16: (
Chris@16:     get,
Chris@16:     value_type_of
Chris@16: )
Chris@16: 
Chris@16: 
Chris@16: 
Chris@16: // Implementation
Chris@16: // -------------------------------------------------------------------------
Chris@16: 
Chris@16: BOOST_BIMAP_SYMMETRIC_ACCESS_IMPLEMENTATION_BUILDER
Chris@16: (
Chris@16:     get,
Chris@16:     SymmetricType,
Chris@16:     st,
Chris@16:     return st.get_left(),
Chris@16:     return st.get_right()
Chris@16: )
Chris@16: 
Chris@16: namespace detail {
Chris@16: 
Chris@16: template< class SymmetricType >
Chris@16: BOOST_DEDUCED_TYPENAME result_of::get<
Chris@16:     ::boost::bimaps::relation::member_at::info, SymmetricType >::type
Chris@16: get(::boost::bimaps::relation::member_at::info, SymmetricType & rel)
Chris@16: {
Chris@16:     return rel.info;
Chris@16: }
Chris@16: 
Chris@16: } // namespace detail
Chris@16: 
Chris@16: // Interface
Chris@16: //----------------------------------------------------------------------------
Chris@16: 
Chris@16: BOOST_BIMAP_SYMMETRIC_ACCESS_INTERFACE_BUILDER
Chris@16: (
Chris@16:     get
Chris@16: )
Chris@16: 
Chris@16: 
Chris@16: } // namespace support
Chris@16: } // namespace relation
Chris@16: } // namespace bimaps
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // BOOST_BIMAP_DOXYGEN_WILL_NOT_PROCESS_THE_FOLLOWING_LINES
Chris@16: 
Chris@16: #endif // BOOST_BIMAP_RELATION_SUPPORT_GET_HPP
Chris@16: