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