boost/fusion/view/iterator_range/detail/segments_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2011 Eric Niebler
   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 #if !defined(BOOST_FUSION_ITERATOR_RANGE_SEGMENTS_HPP_INCLUDED)
   8 #define BOOST_FUSION_ITERATOR_RANGE_SEGMENTS_HPP_INCLUDED
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/mpl/assert.hpp>
  12 #include <boost/fusion/sequence/intrinsic/segments.hpp>
  13 #include <boost/fusion/support/is_segmented.hpp>
  14 #include <boost/fusion/view/iterator_range/detail/segmented_iterator_range.hpp>
  15
  16 namespace boost { namespace fusion
  17 {
  18     struct iterator_range_tag;
  19
  20     namespace extension
  21     {
  22         template <typename Tag>
  23         struct segments_impl;
  24
  25         template <>
  26         struct segments_impl<iterator_range_tag>
  27         {
  28             template <typename Sequence>
  29             struct apply
  30             {
  31                 typedef
  32                     detail::make_segmented_range<
  33                         typename Sequence::begin_type
  34                       , typename Sequence::end_type
  35                     >
  36                 impl;
  37
  38                 BOOST_MPL_ASSERT((traits::is_segmented<typename impl::type>));
  39
  40                 typedef
  41                     typename result_of::segments<typename impl::type>::type
  42                 type;
  43
  44                 BOOST_FUSION_GPU_ENABLED
  45                 static type call(Sequence & seq)
  46                 {
  47                     return fusion::segments(impl::call(seq.first, seq.last));
  48                 }
  49             };
  50         };
  51     }
  52 }}
  53
  54 #endif