#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.

 // $Source: /cvsroot/boost/boost/boost/mpl/zip_view.hpp,v $

 // $Date: 2004/09/02 15:40:42 $

 // $Revision: 1.3 $

 #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

               , next<_1>

             >::type

         > next;

 };

 template<

       typename BOOST_MPL_AUX_NA_PARAM(Sequences)

     >

 struct zip_view

 {

  private:

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

     typedef typename transform1< Sequences, 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