ceph/src/boost/libs/fusion/include/boost/fusion/view/reverse_view/detail/value_at_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2009 Christopher Schmidt
   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 #ifndef BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_VALUE_AT_IMPL_HPP
   9 #define BOOST_FUSION_VIEW_REVERSE_VIEW_DETAIL_VALUE_AT_IMPL_HPP
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/fusion/sequence/intrinsic/value_at.hpp>
  13 #include <boost/mpl/minus.hpp>
  14 #include <boost/mpl/int.hpp>
  15
  16 namespace boost { namespace fusion { namespace extension
  17 {
  18     template <typename>
  19     struct value_at_impl;
  20
  21     template <>
  22     struct value_at_impl<reverse_view_tag>
  23     {
  24         template <typename Seq, typename N>
  25         struct apply
  26           : result_of::value_at<
  27                 typename Seq::seq_type
  28               , mpl::minus<typename Seq::size, mpl::int_<1>, N>
  29             >
  30         {};
  31     };
  32 }}}
  33
  34 #endif