ceph/src/boost/libs/fusion/include/boost/fusion/container/vector/detail/cpp03/value_at_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_VALUE_AT_IMPL_05052005_0232)
   8 #define FUSION_VALUE_AT_IMPL_05052005_0232
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/mpl/at.hpp>
  12
  13 namespace boost { namespace fusion
  14 {
  15     struct vector_tag;
  16
  17     namespace extension
  18     {
  19         template <typename Tag>
  20         struct value_at_impl;
  21
  22         template <>
  23         struct value_at_impl<vector_tag>
  24         {
  25             template <typename Sequence, typename N>
  26             struct apply
  27             {
  28                 typedef typename mpl::at<typename Sequence::types, N>::type type;
  29             };
  30         };
  31     }
  32 }}
  33
  34 #endif