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

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