| |
| #ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED |
| #define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED |
| |
| // Copyright Aleksey Gurtovoy 2000-2010 |
| // 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 61591 2010-04-26 21:31:09Z agurtovoy $ |
| // $Date: 2010-04-26 17:31:09 -0400 (Mon, 26 Apr 2010) $ |
| // $Revision: 61591 $ |
| |
| #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_view type; |
| 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 |