ceph/src/boost/libs/fusion/include/boost/fusion/container/vector/detail/prior_impl.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   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(FUSION_PRIOR_IMPL_05042005_1145)
   8 #define FUSION_PRIOR_IMPL_05042005_1145
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/container/vector/vector_iterator.hpp>
  12
  13 namespace boost { namespace fusion
  14 {
  15     struct vector_iterator_tag;
  16     template <typename Vector, int N>
  17     struct vector_iterator;
  18
  19     namespace extension
  20     {
  21         template <typename Tag>
  22         struct prior_impl;
  23
  24         template <>
  25         struct prior_impl<vector_iterator_tag>
  26         {
  27             template <typename Iterator>
  28             struct apply
  29             {
  30                 typedef typename Iterator::vector vector;
  31                 typedef typename Iterator::index index;
  32                 typedef vector_iterator<vector, index::value-1> type;
  33
  34                 BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  35                 static type
  36                 call(Iterator const& i)
  37                 {
  38                     return type(i.vec);
  39                 }
  40             };
  41         };
  42     }
  43 }}
  44
  45 #endif