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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\fusion\view\transform_view\detail\begin_impl.hpp

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

    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_BEGIN_IMPL_07162005_1031)
#define FUSION_BEGIN_IMPL_07162005_1031

#include <boost/fusion/view/transform_view/transform_view_fwd.hpp>

namespace boost { namespace fusion
{
    template <typename First, typename F>
    struct transform_view_iterator;

    template <typename First1, typename First2, typename F>
    struct transform_view_iterator2;

    namespace extension
    {
        template <typename Tag>
        struct begin_impl;

        // Unary Version
        template <>
        struct begin_impl<transform_view_tag>
        {
            template <typename Sequence>
            struct apply
            {
                typedef typename Sequence::first_type first_type;
                typedef typename Sequence::transform_type transform_type;
                typedef transform_view_iterator<first_type, transform_type> type;

                static type
                call(Sequence& s)
                {
                    return type(s.first(), s.f);
                }
            };
        };

        // Binary Version
        template <>
        struct begin_impl<transform_view2_tag>
        {
            template <typename Sequence>
            struct apply
            {
                typedef typename Sequence::first1_type first1_type;
                typedef typename Sequence::first2_type first2_type;
                typedef typename Sequence::transform_type transform_type;
                typedef transform_view_iterator2<first1_type, first2_type, transform_type> type;

                static type
                call(Sequence& s)
                {
                    return type(s.first1(), s.first2(), s.f);
                }
            };
        };
    }
}}

#endif

begin_impl.hpp

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