boost/fusion/container/map/detail/convert_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2006 Joel de Guzman
   3     Copyright (c) 2005-2006 Dan Marsden
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(FUSION_CONVERT_IMPL_09232005_1340)
   9 #define FUSION_CONVERT_IMPL_09232005_1340
  10
  11 #include <boost/fusion/container/map/detail/as_map.hpp>
  12 #include <boost/fusion/container/map/map.hpp>
  13 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  14 #include <boost/fusion/sequence/intrinsic/size.hpp>
  15
  16 namespace boost { namespace fusion
  17 {
  18     struct map_tag;
  19
  20     namespace extension
  21     {
  22         template <typename T>
  23         struct convert_impl;
  24
  25         template <>
  26         struct convert_impl<map_tag>
  27         {
  28             template <typename Sequence>
  29             struct apply
  30             {
  31                 typedef typename detail::as_map<result_of::size<Sequence>::value> gen;
  32                 typedef typename gen::
  33                     template apply<typename result_of::begin<Sequence>::type>::type
  34                 type;
  35
  36                 static type call(Sequence& seq)
  37                 {
  38                     return gen::call(fusion::begin(seq));
  39                 }
  40             };
  41         };
  42     }
  43 }}
  44
  45 #endif