3rdparty/boost/boost/fusion/view/single_view/detail/advance_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
   8 #if !defined(BOOST_FUSION_SINGLE_VIEW_ADVANCE_IMPL_JUL_07_2011_1348PM)
   9 #define BOOST_FUSION_SINGLE_VIEW_ADVANCE_IMPL_JUL_07_2011_1348PM
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/mpl/plus.hpp>
  13
  14 namespace boost { namespace fusion
  15 {
  16     struct single_view_iterator_tag;
  17
  18     template <typename SingleView, typename Pos>
  19     struct single_view_iterator;
  20
  21     namespace extension
  22     {
  23         template<typename Tag>
  24         struct advance_impl;
  25
  26         template<>
  27         struct advance_impl<single_view_iterator_tag>
  28         {
  29             template<typename Iterator, typename Dist>
  30             struct apply
  31             {
  32                 typedef single_view_iterator<
  33                     typename Iterator::single_view_type,
  34                     typename mpl::plus<typename Iterator::position, Dist>::type>
  35                 type;
  36
  37                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  38                 static type
  39                 call(Iterator const& i)
  40                 {
  41                     return type(i.view);
  42                 }
  43             };
  44         };
  45     }
  46
  47 }}
  48
  49 #endif