1 | |
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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 |
77 |