ceph/src/boost/libs/mpl/include/boost/mpl/map/aux_/contains_impl.hpp

   1
   2 #ifndef BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED
   3 #define BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2003-2004
   6 //
   7 // Distributed under the Boost Software License, Version 1.0.
   8 // (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 // See http://www.boost.org/libs/mpl for documentation.
  12
  13 // $Id$
  14 // $Date$
  15 // $Revision$
  16
  17 #include <boost/mpl/contains_fwd.hpp>
  18 #include <boost/mpl/if.hpp>
  19 #include <boost/mpl/map/aux_/at_impl.hpp>
  20 #include <boost/mpl/map/aux_/tag.hpp>
  21
  22 #include <boost/type_traits/is_same.hpp>
  23
  24 namespace boost { namespace mpl {
  25
  26 template<>
  27 struct contains_impl< aux::map_tag >
  28 {
  29     template< typename Map, typename Pair > struct apply
  30         : is_same<
  31               typename at_impl<aux::map_tag>::apply<
  32                   Map
  33                 , typename Pair::first
  34                 >::type
  35             , typename Pair::second
  36             >
  37     {
  38     };
  39 };
  40
  41 }}
  42
  43 #endif // BOOST_MPL_MAP_AUX_CONTAINS_IMPL_HPP_INCLUDED