ceph/src/boost/libs/fusion/include/boost/fusion/mpl/front.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_FRONT_10022005_1618)
   8 #define FUSION_FRONT_10022005_1618
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/mpl/front.hpp>
  12 #include <boost/fusion/sequence/intrinsic/begin.hpp>
  13 #include <boost/fusion/iterator/value_of.hpp>
  14
  15 namespace boost { namespace mpl
  16 {
  17     template <typename Tag>
  18     struct front_impl;
  19
  20     template <>
  21     struct front_impl<fusion::fusion_sequence_tag>
  22     {
  23         template <typename Sequence>
  24         struct apply :
  25             fusion::result_of::value_of<typename fusion::result_of::begin<Sequence>::type> {};
  26     };
  27 }}
  28
  29 #endif