ceph/src/boost/libs/bimap/include/boost/bimap/support/map_type_by.hpp

   1 // Boost.Bimap
   2 //
   3 // Copyright (c) 2006-2007 Matias Capeletto
   4 //
   5 // Distributed under the Boost Software License, Version 1.0.
   6 // (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 /// \file support/map_type_by.hpp
  10 /// \brief Metafunction to access the map view types of a bimap
  11
  12 #ifndef BOOST_BIMAP_SUPPORT_MAP_TYPE_BY_HPP
  13 #define BOOST_BIMAP_SUPPORT_MAP_TYPE_BY_HPP
  14
  15 #if defined(_MSC_VER)
  16 #pragma once
  17 #endif
  18
  19 #include <boost/config.hpp>
  20
  21 #include <boost/bimap/relation/detail/metadata_access_builder.hpp>
  22
  23 /** \struct boost::bimaps::support::map_type_by
  24
  25 \brief Metafunction to obtain the map view type of a bimap indexed by one of the sides.
  26
  27 The tag parameter can be either a user defined tag or \c member_at::{side}.
  28 The returned type is signature-compatible with std::pair.
  29
  30 \code
  31
  32 template< class Tag, class Bimap >
  33 struct map_type_by
  34 {
  35     typedef typename Bimap::{side}_map_type type;
  36 };
  37
  38 \endcode
  39
  40 See also member_at.
  41 \ingroup bimap_group
  42                                                                     **/
  43
  44 namespace boost {
  45 namespace bimaps {
  46 namespace support {
  47
  48 // Implementation of map type by metafunction
  49
  50 BOOST_BIMAP_SYMMETRIC_METADATA_ACCESS_BUILDER
  51 (
  52     map_type_by,
  53     left_map,
  54     right_map
  55 )
  56
  57
  58
  59 } // namespace support
  60 } // namespace bimaps
  61 } // namespace boost
  62
  63
  64 #endif // BOOST_BIMAP_SUPPORT_MAP_TYPE_BY_HPP
  65