sl@0: 
sl@0: #ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
sl@0: #define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED
sl@0: 
sl@0: // Copyright Aleksey Gurtovoy 2000-2002
sl@0: // Copyright David Abrahams 2000-2002
sl@0: //
sl@0: // Distributed under the Boost Software License, Version 1.0.
sl@0: // (See accompanying file LICENSE_1_0.txt or copy at 
sl@0: // http://www.boost.org/LICENSE_1_0.txt)
sl@0: //
sl@0: // See http://www.boost.org/libs/mpl for documentation.
sl@0: 
sl@0: // $Source: /cvsroot/boost/boost/boost/mpl/zip_view.hpp,v $
sl@0: // $Date: 2004/09/02 15:40:42 $
sl@0: // $Revision: 1.3 $
sl@0: 
sl@0: #include <boost/mpl/transform.hpp>
sl@0: #include <boost/mpl/begin_end.hpp>
sl@0: #include <boost/mpl/iterator_tags.hpp>
sl@0: #include <boost/mpl/next.hpp>
sl@0: #include <boost/mpl/lambda.hpp>
sl@0: #include <boost/mpl/deref.hpp>
sl@0: #include <boost/mpl/aux_/na_spec.hpp>
sl@0: 
sl@0: namespace boost { namespace mpl {
sl@0: 
sl@0: template< typename IteratorSeq >
sl@0: struct zip_iterator
sl@0: {
sl@0:     typedef forward_iterator_tag category;
sl@0:     typedef typename transform1<
sl@0:           IteratorSeq
sl@0:         , deref<_1>
sl@0:         >::type type;
sl@0: 
sl@0:     typedef zip_iterator<
sl@0:           typename transform1<
sl@0:                 IteratorSeq
sl@0:               , next<_1>
sl@0:             >::type
sl@0:         > next;
sl@0: };
sl@0: 
sl@0: template<
sl@0:       typename BOOST_MPL_AUX_NA_PARAM(Sequences)
sl@0:     >
sl@0: struct zip_view
sl@0: {
sl@0:  private:
sl@0:     typedef typename transform1< Sequences, begin<_1> >::type first_ones_;
sl@0:     typedef typename transform1< Sequences, end<_1> >::type last_ones_;
sl@0:     
sl@0:  public:
sl@0:     typedef nested_begin_end_tag tag;
sl@0:     typedef zip_iterator<first_ones_> begin;
sl@0:     typedef zip_iterator<last_ones_> end;
sl@0: };
sl@0: 
sl@0: BOOST_MPL_AUX_NA_SPEC(1, zip_view)
sl@0: 
sl@0: }}
sl@0: 
sl@0: #endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED