1 | |
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2 | #ifndef BOOST_MPL_ZIP_VIEW_HPP_INCLUDED |
3 | #define BOOST_MPL_ZIP_VIEW_HPP_INCLUDED |
4 | |
5 | // Copyright Aleksey Gurtovoy 2000-2010 |
6 | // Copyright David Abrahams 2000-2002 |
7 | // |
8 | // Distributed under the Boost Software License, Version 1.0. |
9 | // (See accompanying file LICENSE_1_0.txt or copy at |
10 | // http://www.boost.org/LICENSE_1_0.txt) |
11 | // |
12 | // See http://www.boost.org/libs/mpl for documentation. |
13 | |
14 | // $Id$ |
15 | // $Date$ |
16 | // $Revision$ |
17 | |
18 | #include <boost/mpl/transform.hpp> |
19 | #include <boost/mpl/begin_end.hpp> |
20 | #include <boost/mpl/iterator_tags.hpp> |
21 | #include <boost/mpl/next.hpp> |
22 | #include <boost/mpl/lambda.hpp> |
23 | #include <boost/mpl/deref.hpp> |
24 | #include <boost/mpl/aux_/na_spec.hpp> |
25 | |
26 | namespace boost { namespace mpl { |
27 | |
28 | template< typename IteratorSeq > |
29 | struct zip_iterator |
30 | { |
31 | typedef forward_iterator_tag category; |
32 | typedef typename transform1< |
33 | IteratorSeq |
34 | , deref<_1> |
35 | >::type type; |
36 | |
37 | typedef zip_iterator< |
38 | typename transform1< |
39 | IteratorSeq |
40 | , mpl::next<_1> |
41 | >::type |
42 | > next; |
43 | }; |
44 | |
45 | template< |
46 | typename BOOST_MPL_AUX_NA_PARAM(Sequences) |
47 | > |
48 | struct zip_view |
49 | { |
50 | private: |
51 | typedef typename transform1< Sequences, mpl::begin<_1> >::type first_ones_; |
52 | typedef typename transform1< Sequences, mpl::end<_1> >::type last_ones_; |
53 | |
54 | public: |
55 | typedef nested_begin_end_tag tag; |
56 | typedef zip_view type; |
57 | typedef zip_iterator<first_ones_> begin; |
58 | typedef zip_iterator<last_ones_> end; |
59 | }; |
60 | |
61 | BOOST_MPL_AUX_NA_SPEC(1, zip_view) |
62 | |
63 | }} |
64 | |
65 | #endif // BOOST_MPL_ZIP_VIEW_HPP_INCLUDED |
66 |