#ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED

#define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED

// Copyright Aleksey Gurtovoy 2000-2002

// Copyright David Abrahams 2000-2002

//

// 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)

//

// See http://www.boost.org/libs/mpl for documentation.

// $Id: zip_view.hpp 49267 2008-10-11 06:19:02Z agurtovoy $

// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $

// $Revision: 49267 $

#include <boost/mpl/transform.hpp>

#include <boost/mpl/begin_end.hpp>

#include <boost/mpl/iterator_tags.hpp>

#include <boost/mpl/next.hpp>

#include <boost/mpl/lambda.hpp>

#include <boost/mpl/deref.hpp>

#include <boost/mpl/aux_/na_spec.hpp>

namespace boost { namespace mpl {

template< typename IteratorSeq >

struct zip_iterator

{

    typedef forward_iterator_tag category;

    typedef typename transform1<

          IteratorSeq

        , deref<_1>

        >::type type;

    typedef zip_iterator<

          typename transform1<

                IteratorSeq

              , mpl::next<_1>

            >::type

        > next;

};

template<

      typename BOOST_MPL_AUX_NA_PARAM(Sequences)

    >

struct zip_view

{

 private:

    typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_;

    typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_;

 public:

    typedef nested_begin_end_tag tag;

    typedef zip_iterator<first_ones_> begin;

    typedef zip_iterator<last_ones_> end;

};

BOOST_MPL_AUX_NA_SPEC(1, zip_view)

}}

#endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED