ceph/src/boost/boost/fusion/adapted/array/at_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2010 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_ADAPTED_ARRAY_AT_IMPL_HPP
   9 #define BOOST_FUSION_ADAPTED_ARRAY_AT_IMPL_HPP
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/type_traits/add_reference.hpp>
  13 #include <boost/type_traits/remove_extent.hpp>
  14
  15 namespace boost { namespace fusion { namespace extension
  16 {
  17     template<typename>
  18     struct at_impl;
  19
  20     template<>
  21     struct at_impl<po_array_tag>
  22     {
  23         template<typename Seq, typename N>
  24         struct apply
  25         {
  26             typedef typename
  27                 add_reference<typename remove_extent<Seq>::type>::type
  28             type;
  29
  30             BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  31             static type
  32             call(Seq& seq)
  33             {
  34                 return seq[N::value];
  35             }
  36         };
  37     };
  38 }}}
  39
  40 #endif