ceph/src/boost/libs/fusion/include/boost/fusion/sequence/comparison/detail/greater.hpp

   1 /*=============================================================================
   2     Copyright (c) 1999-2003 Jaakko Jarvi
   3     Copyright (c) 2001-2011 Joel de Guzman
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(FUSION_GREATER_05052005_1142)
   9 #define FUSION_GREATER_05052005_1142
  10
  11 #include <boost/fusion/support/config.hpp>
  12 #include <boost/mpl/bool.hpp>
  13 #include <boost/fusion/iterator/deref.hpp>
  14 #include <boost/fusion/iterator/next.hpp>
  15 #include <boost/fusion/iterator/equal_to.hpp>
  16 #include <boost/fusion/support/as_const.hpp>
  17
  18 namespace boost { namespace fusion { namespace detail
  19 {
  20     template <typename Seq1, typename Seq2>
  21     struct sequence_greater
  22     {
  23         typedef typename result_of::end<Seq1>::type end1_type;
  24         typedef typename result_of::end<Seq2>::type end2_type;
  25
  26         template <typename I1, typename I2>
  27         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  28         static bool
  29         call(I1 const&, I2 const&, mpl::true_)
  30         {
  31             return false;
  32         }
  33
  34         template <typename I1, typename I2>
  35         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  36         static bool
  37         call(I1 const& a, I2 const& b, mpl::false_)
  38         {
  39             return extension::as_const(*a) > extension::as_const(*b) ||
  40                 (!(extension::as_const(*b) > extension::as_const(*a)) &&
  41                  call(fusion::next(a), fusion::next(b)));
  42         }
  43
  44         template <typename I1, typename I2>
  45         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
  46         static bool
  47         call(I1 const& a, I2 const& b)
  48         {
  49             typename result_of::equal_to<I1, end1_type>::type eq;
  50             return call(a, b, eq);
  51         }
  52     };
  53 }}}
  54
  55 #endif