1 /*=============================================================================
2 Copyright (c) 1999-2003 Jaakko Jarvi
3 Copyright (c) 2001-2011 Joel de Guzman
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
11 #include <boost/mpl/bool.hpp>
12 #include <boost/fusion/iterator/deref.hpp>
13 #include <boost/fusion/iterator/next.hpp>
14 #include <boost/fusion/iterator/equal_to.hpp>
15 #include <boost/fusion/support/as_const.hpp>
17 namespace boost { namespace fusion { namespace detail
19 template <typename Seq1, typename Seq2>
20 struct sequence_greater
22 typedef typename result_of::end<Seq1>::type end1_type;
23 typedef typename result_of::end<Seq2>::type end2_type;
25 template <typename I1, typename I2>
27 call(I1 const&, I2 const&, mpl::true_)
32 template <typename I1, typename I2>
34 call(I1 const& a, I2 const& b, mpl::false_)
36 return extension::as_const(*a) > extension::as_const(*b) ||
37 (!(extension::as_const(*b) > extension::as_const(*a)) &&
38 call(fusion::next(a), fusion::next(b)));
41 template <typename I1, typename I2>
43 call(I1 const& a, I2 const& b)
45 typename result_of::equal_to<I1, end1_type>::type eq;
46 return call(a, b, eq);