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1 | |
2 | #ifndef BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED | |
3 | #define BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2000-2004 | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. | |
8 | // (See accompanying file LICENSE_1_0.txt or copy at | |
9 | // http://www.boost.org/LICENSE_1_0.txt) | |
10 | // | |
11 | // See http://www.boost.org/libs/mpl for documentation. | |
12 | ||
13 | // $Id$ | |
14 | // $Date$ | |
15 | // $Revision$ | |
16 | ||
17 | #include <boost/mpl/iterator_tags.hpp> | |
18 | #include <boost/mpl/next_prior.hpp> | |
19 | #include <boost/mpl/deref.hpp> | |
20 | #include <boost/mpl/list/aux_/item.hpp> | |
21 | #include <boost/mpl/aux_/na.hpp> | |
22 | #include <boost/mpl/aux_/lambda_spec.hpp> | |
23 | #include <boost/mpl/aux_/config/ctps.hpp> | |
24 | ||
25 | namespace boost { namespace mpl { | |
26 | ||
27 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) | |
28 | ||
29 | template< typename Node > | |
30 | struct l_iter | |
31 | { | |
32 | typedef aux::l_iter_tag tag; | |
33 | typedef forward_iterator_tag category; | |
34 | }; | |
35 | ||
36 | template< typename Node > | |
37 | struct deref< l_iter<Node> > | |
38 | { | |
39 | typedef typename Node::item type; | |
40 | }; | |
41 | ||
42 | template< typename Node > | |
43 | struct next< l_iter<Node> > | |
44 | { | |
45 | typedef l_iter< typename Node::next > type; | |
46 | }; | |
47 | ||
48 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION | |
49 | ||
50 | template< typename Node > | |
51 | struct l_iter | |
52 | { | |
53 | typedef aux::l_iter_tag tag; | |
54 | typedef forward_iterator_tag category; | |
55 | typedef typename Node::item type; | |
56 | typedef l_iter< typename mpl::next<Node>::type > next; | |
57 | }; | |
58 | ||
59 | #endif | |
60 | ||
61 | ||
62 | template<> struct l_iter<l_end> | |
63 | { | |
64 | typedef aux::l_iter_tag tag; | |
65 | typedef forward_iterator_tag category; | |
66 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) | |
67 | typedef na type; | |
68 | typedef l_iter next; | |
69 | #endif | |
70 | }; | |
71 | ||
72 | BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1, l_iter) | |
73 | ||
74 | }} | |
75 | ||
76 | #endif // BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED |