map/detail/begin_impl.hpp

0001 /*=============================================================================
0002     Copyright (c) 2005-2013 Joel de Guzman
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007 #if !defined(BOOST_FUSION_MAP_BEGIN_IMPL_02042013_0857)
0008 #define BOOST_FUSION_MAP_BEGIN_IMPL_02042013_0857
0009
0010 #include <boost/fusion/support/config.hpp>
0011 #include <boost/fusion/container/map/map_iterator.hpp>
0012
0013 namespace boost { namespace fusion
0014 {
0015     struct map_tag;
0016
0017     namespace extension
0018     {
0019         template<typename T>
0020         struct begin_impl;
0021
0022         template<>
0023         struct begin_impl<map_tag>
0024         {
0025             template<typename Sequence>
0026             struct apply
0027             {
0028                 typedef map_iterator<Sequence, 0> type;
0029
0030                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0031                 static type call(Sequence& seq)
0032                 {
0033                     return type(seq);
0034                 }
0035             };
0036         };
0037     }
0038 }}
0039
0040 #endif