ceph/src/boost/boost/fusion/view/nview/detail/begin_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2009 Hartmut Kaiser
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7
   8 #if !defined(BOOST_FUSION_NVIEW_BEGIN_IMPL_SEP_23_2009_1036PM)
   9 #define BOOST_FUSION_NVIEW_BEGIN_IMPL_SEP_23_2009_1036PM
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  13
  14 namespace boost { namespace fusion
  15 {
  16     struct nview_tag;
  17
  18     template <typename Sequence, typename Pos>
  19     struct nview_iterator;
  20
  21     namespace extension
  22     {
  23         template<typename Tag>
  24         struct begin_impl;
  25
  26         template<>
  27         struct begin_impl<nview_tag>
  28         {
  29             template<typename Sequence>
  30             struct apply
  31             {
  32                 typedef typename Sequence::index_type index_type;
  33
  34                 typedef nview_iterator<Sequence,
  35                     typename result_of::begin<index_type>::type> type;
  36
  37                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  38                 static type call(Sequence& s)
  39                 {
  40                     return type(s);
  41                 }
  42             };
  43         };
  44     }
  45
  46 }}
  47
  48 #endif
  49