Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2013 Joel de Guzman
Chris@16: 
Chris@16:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: ==============================================================================*/
Chris@16: #if !defined(BOOST_FUSION_MAP_DETAIL_AT_IMPL_02042013_0821)
Chris@16: #define BOOST_FUSION_MAP_DETAIL_AT_IMPL_02042013_0821
Chris@16: 
Chris@16: #include <boost/fusion/support/detail/access.hpp>
Chris@16: 
Chris@16: namespace boost { namespace fusion
Chris@16: {
Chris@16:     struct map_tag;
Chris@16: 
Chris@16:     namespace extension
Chris@16:     {
Chris@16:         template <typename Tag>
Chris@16:         struct at_impl;
Chris@16: 
Chris@16:         template <>
Chris@16:         struct at_impl<map_tag>
Chris@16:         {
Chris@16:             template <typename Sequence, typename N>
Chris@16:             struct apply
Chris@16:             {
Chris@16:                 typedef mpl::int_<N::value> index;
Chris@16:                 typedef
Chris@16:                     decltype(std::declval<Sequence>().get(index()))
Chris@16:                 type;
Chris@16: 
Chris@16:                 static type
Chris@16:                 call(Sequence& m)
Chris@16:                 {
Chris@16:                     return m.get(index());
Chris@16:                 }
Chris@16:             };
Chris@16: 
Chris@16:             template <typename Sequence, typename N>
Chris@16:             struct apply<Sequence const, N>
Chris@16:             {
Chris@16:                 typedef mpl::int_<N::value> index;
Chris@16:                 typedef
Chris@16:                     decltype(std::declval<Sequence const>().get(index()))
Chris@16:                 type;
Chris@16: 
Chris@16:                 static type
Chris@16:                 call(Sequence const& m)
Chris@16:                 {
Chris@16:                     return m.get(index());
Chris@16:                 }
Chris@16:             };
Chris@16:         };
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif