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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\fusion\view\reverse_view\detail\distance_impl.hpp

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/*=============================================================================
    Copyright (c) 2001-2006 Joel de Guzman
    Copyright (c) 2005-2006 Dan Marsden

    Distributed under the Boost Software License, Version 1.0. (See accompanying 
    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#if !defined(FUSION_DISTANCE_IMPL_14122005_2104)
#define FUSION_DISTANCE_IMPL_14122005_2104

#include <boost/fusion/iterator/distance.hpp>

namespace boost { namespace fusion {

    struct reverse_view_iterator_tag;

    template <typename Iterator>
    struct reverse_view_iterator;

    namespace extension
    {
        template<typename Tag>
        struct distance_impl;

        template<>
        struct distance_impl<reverse_view_iterator_tag>
        {
            template<typename First, typename Last>
            struct apply
            {
                typedef typename First::first_type first_type;
                typedef typename Last::first_type last_type;
                typedef typename result_of::distance<last_type, first_type>::type type;

                static type
                call(First const& first, Last const& last)
                {
                    return boost::fusion::distance(last.first, first.first);
                }
            };
        };
    }
}}

#endif

distance_impl.hpp

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