/*=============================================================================

    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





