/Src/Dependencies/Boost/boost/fusion/sequence/comparison/detail/greater.hpp

 1/*=============================================================================
 2    Copyright (c) 1999-2003 Jaakko Jarvi
 3    Copyright (c) 2001-2006 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/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
16namespace boost { namespace fusion { namespace detail
17{
18    template <typename Seq1, typename Seq2>
19    struct sequence_greater
20    {
21        typedef typename result_of::end<Seq1>::type end1_type;
22        typedef typename result_of::end<Seq2>::type end2_type;
23
24        template <typename I1, typename I2>
25        static bool
26        call(I1 const&, I2 const&, mpl::true_)
27        {
28            return false;
29        }
30
31        template <typename I1, typename I2>
32        static bool
33        call(I1 const& a, I2 const& b, mpl::false_)
34        {
35            return *a > *b ||
36                (!(*b > *a) && call(fusion::next(a), fusion::next(b)));
37        }
38
39        template <typename I1, typename I2>
40        static bool
41        call(I1 const& a, I2 const& b)
42        {
43            typename result_of::equal_to<I1, end1_type>::type eq;
44            return call(a, b, eq);
45        }
46    };
47}}}
48
49#endif