ceph/src/boost/libs/fusion/include/boost/fusion/view/filter_view/detail/size_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_SIZE_IMPL_09232005_1058)
   8 #define FUSION_SIZE_IMPL_09232005_1058
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/fusion/iterator/distance.hpp>
  12 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  13 #include <boost/fusion/sequence/intrinsic/end.hpp>
  14
  15 namespace boost { namespace fusion
  16 {
  17     struct filter_view_tag;
  18
  19     namespace extension
  20     {
  21         template <typename Tag>
  22         struct size_impl;
  23
  24         template <>
  25         struct size_impl<filter_view_tag>
  26         {
  27             template <typename Sequence>
  28             struct apply
  29                 : result_of::distance<
  30                     typename result_of::begin<Sequence>::type
  31                   , typename result_of::end<Sequence>::type>
  32             {};
  33         };
  34     }
  35 }}
  36
  37 #endif
  38
  39