boost_ext/boost/bimap/relation/symmetrical_base.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 relation/symmetrical_base.hpp
  10 /// \brief Base class for symmetrical types
  11
  12 #ifndef BOOST_BIMAP_RELATION_SYMMETRICAL_BASE_HPP
  13 #define BOOST_BIMAP_RELATION_SYMMETRICAL_BASE_HPP
  14
  15 #if defined(_MSC_VER) && (_MSC_VER>=1200)
  16 #pragma once
  17 #endif
  18
  19 #include <boost/config.hpp>
  20
  21 #include <boost/mpl/if.hpp>
  22 #include <boost/type_traits/remove_const.hpp>
  23
  24 // Boost.Bimap
  25 #include <boost/bimap/tags/tagged.hpp>
  26 #include <boost/bimap/tags/support/default_tagged.hpp>
  27
  28 #include <boost/bimap/relation/member_at.hpp>
  29
  30
  31 namespace boost {
  32 namespace bimaps {
  33 namespace relation {
  34
  35 /// \brief Base of symetrical tagged types.
  36 /**
  37
  38                                                            **/
  39
  40 template< class TA, class TB, bool force_mutable = false >
  41 class symmetrical_base
  42 {
  43
  44     public:
  45
  46     typedef BOOST_DEDUCED_TYPENAME tags::support::default_tagged
  47     <
  48         TA,
  49         member_at::left
  50
  51     >::type tagged_left_type;
  52
  53     typedef BOOST_DEDUCED_TYPENAME tags::support::default_tagged
  54     <
  55         TB,
  56         member_at::right
  57
  58     >::type tagged_right_type;
  59
  60     public:
  61
  62     //@{
  63         /// The type stored in the relation
  64
  65         typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< force_mutable,
  66
  67             BOOST_DEDUCED_TYPENAME ::boost::remove_const<
  68                 BOOST_DEDUCED_TYPENAME tagged_left_type::value_type >::type,
  69             BOOST_DEDUCED_TYPENAME tagged_left_type::value_type
  70
  71         >::type left_value_type;
  72
  73         typedef BOOST_DEDUCED_TYPENAME ::boost::mpl::if_c< force_mutable,
  74
  75             BOOST_DEDUCED_TYPENAME ::boost::remove_const<
  76                 BOOST_DEDUCED_TYPENAME tagged_right_type::value_type >::type,
  77             BOOST_DEDUCED_TYPENAME tagged_right_type::value_type
  78
  79         >::type right_value_type;
  80     //@}
  81
  82     //@{
  83         /// The tag of the member. By default it is \c member_at::{side}
  84         typedef BOOST_DEDUCED_TYPENAME tagged_left_type ::tag  left_tag;
  85         typedef BOOST_DEDUCED_TYPENAME tagged_right_type::tag right_tag;
  86     //@}
  87 };
  88
  89
  90
  91 } // namespace relation
  92 } // namespace bimaps
  93 } // namespace boost
  94
  95
  96 #endif // BOOST_BIMAP_RELATION_SYMMETRICAL_BASE_HPP
  97