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
25namespace boost { namespace mpl {
26
27#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
28
29template< typename Node >
30struct l_iter
31{
32 typedef aux::l_iter_tag tag;
33 typedef forward_iterator_tag category;
34};
35
36template< typename Node >
37struct deref< l_iter<Node> >
38{
39 typedef typename Node::item type;
40};
41
42template< typename Node >
43struct next< l_iter<Node> >
44{
45 typedef l_iter< typename Node::next > type;
46};
47
48#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
49
50template< typename Node >
51struct 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
62template<> 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
72BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1, l_iter)
73
74}}
75
76#endif // BOOST_MPL_LIST_AUX_ITERATOR_HPP_INCLUDED
77

source code of include/boost/mpl/list/aux_/iterator.hpp