ceph/src/boost/boost/fusion/sequence/comparison/enable_comparison.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_ENABLE_COMPARISON_09232005_1958)
   8 #define FUSION_ENABLE_COMPARISON_09232005_1958
   9
  10 #include <boost/fusion/support/config.hpp>
  11 #include <boost/mpl/or.hpp>
  12 #include <boost/mpl/and.hpp>
  13 #include <boost/mpl/not.hpp>
  14 #include <boost/mpl/equal_to.hpp>
  15 #include <boost/fusion/support/sequence_base.hpp>
  16 #include <boost/fusion/support/is_sequence.hpp>
  17 #include <boost/fusion/sequence/intrinsic/size.hpp>
  18
  19 namespace boost { namespace fusion { namespace traits
  20 {
  21     template <typename Seq1, typename Seq2, typename Enable = void>
  22     struct enable_equality
  23         : mpl::or_<traits::is_sequence<Seq1>, traits::is_sequence<Seq2> >
  24     {};
  25
  26     template <typename Seq1, typename Seq2, typename Enable = void>
  27     struct enable_comparison
  28         : mpl::and_<
  29             mpl::or_<traits::is_sequence<Seq1>, traits::is_sequence<Seq2> >
  30           , mpl::equal_to<result_of::size<Seq1>, result_of::size<Seq2> >
  31         >
  32     {};
  33 }}}
  34
  35 #endif