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

    Copyright (c) 2003 Joel de Guzman

    Copyright (c) 2004 Peder Holt



    Use, modification and distribution is subject to 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_ALGORITHM_FOLD_HPP)

#define FUSION_ALGORITHM_FOLD_HPP



#include <boost/spirit/fusion/algorithm/detail/fold.ipp>



namespace boost { namespace fusion

{

    namespace meta

    {

        template <typename Sequence, typename State, typename F>

        struct fold

        {

            typedef typename

                detail::static_fold<

                    typename meta::begin<Sequence>::type

                  , typename meta::end<Sequence>::type

                  , State

                  , F

                >::type

            type;

        };

    }



    namespace function

    {

        struct fold

        {

            template <typename Sequence, typename State, typename F>

            struct apply : meta::fold<Sequence, State, F> {};



            template <typename Sequence, typename State, typename F>

            inline typename apply<Sequence const, State, F>::type

            operator()(Sequence const& seq, State const& state, F const& f) const

            {

                return detail::fold(

                    fusion::begin(seq)

                  , fusion::end(seq)

                  , state

                  , f

                  , is_same<

                        BOOST_DEDUCED_TYPENAME meta::begin<Sequence const>::type

                      , BOOST_DEDUCED_TYPENAME meta::end<Sequence const>::type>()

                );

            }



            template <typename Sequence, typename State, typename F>

            inline typename apply<Sequence, State, F>::type

            operator()(Sequence& seq, State const& state, F const& f) const

            {

                return detail::fold(

                    fusion::begin(seq)

                  , fusion::end(seq)

                  , state

                  , f

                  , is_same<

                        BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type

                      , BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>()

                );

            }

        };

    }



    function::fold const fold = function::fold();

}}



#endif



