1/////////////////////////////////////////////////////////////////////////////
2//
3// (C) Copyright Olaf Krzikalla 2004-2006.
4// (C) Copyright Ion Gaztanaga 2006-2013
5//
6// Distributed under the Boost Software License, Version 1.0.
7// (See accompanying file LICENSE_1_0.txt or copy at
8// http://www.boost.org/LICENSE_1_0.txt)
9//
10// See http://www.boost.org/libs/intrusive for documentation.
11//
12/////////////////////////////////////////////////////////////////////////////
13
14#ifndef BOOST_INTRUSIVE_LIST_ITERATOR_HPP
15#define BOOST_INTRUSIVE_LIST_ITERATOR_HPP
16
17#ifndef BOOST_CONFIG_HPP
18# include <boost/config.hpp>
19#endif
20
21#if defined(BOOST_HAS_PRAGMA_ONCE)
22# pragma once
23#endif
24
25#include <boost/intrusive/detail/workaround.hpp>
26#include <boost/intrusive/detail/std_fwd.hpp>
27#include <boost/intrusive/detail/iiterator.hpp>
28#include <boost/intrusive/detail/mpl.hpp>
29
30namespace boost {
31namespace intrusive {
32
33// list_iterator provides some basic functions for a
34// node oriented bidirectional iterator:
35template<class ValueTraits, bool IsConst>
36class list_iterator
37{
38 private:
39 typedef iiterator
40 <ValueTraits, IsConst, std::bidirectional_iterator_tag> types_t;
41
42 static const bool stateful_value_traits = types_t::stateful_value_traits;
43
44 typedef ValueTraits value_traits;
45 typedef typename types_t::node_traits node_traits;
46
47 typedef typename types_t::node node;
48 typedef typename types_t::node_ptr node_ptr;
49 typedef typename types_t::const_value_traits_ptr const_value_traits_ptr;
50 class nat;
51 typedef typename
52 detail::if_c< IsConst
53 , list_iterator<value_traits, false>
54 , nat>::type nonconst_iterator;
55
56 public:
57 typedef typename types_t::iterator_type::difference_type difference_type;
58 typedef typename types_t::iterator_type::value_type value_type;
59 typedef typename types_t::iterator_type::pointer pointer;
60 typedef typename types_t::iterator_type::reference reference;
61 typedef typename types_t::iterator_type::iterator_category iterator_category;
62
63 inline list_iterator()
64 {}
65
66 inline explicit list_iterator(node_ptr nodeptr, const_value_traits_ptr traits_ptr)
67 : members_(nodeptr, traits_ptr)
68 {}
69
70 inline list_iterator(const list_iterator &other)
71 : members_(other.pointed_node(), other.get_value_traits())
72 {}
73
74 inline list_iterator(const nonconst_iterator &other)
75 : members_(other.pointed_node(), other.get_value_traits())
76 {}
77
78 inline list_iterator &operator=(const list_iterator &other)
79 { members_.nodeptr_ = other.members_.nodeptr_; return *this; }
80
81 inline node_ptr pointed_node() const
82 { return members_.nodeptr_; }
83
84 inline list_iterator &operator=(node_ptr nodeptr)
85 { members_.nodeptr_ = nodeptr; return *this; }
86
87 inline const_value_traits_ptr get_value_traits() const
88 { return members_.get_ptr(); }
89
90 public:
91 inline list_iterator& operator++()
92 {
93 node_ptr p = node_traits::get_next(members_.nodeptr_);
94 members_.nodeptr_ = p;
95 return static_cast<list_iterator&> (*this);
96 }
97
98 inline list_iterator operator++(int)
99 {
100 list_iterator result (*this);
101 members_.nodeptr_ = node_traits::get_next(members_.nodeptr_);
102 return result;
103 }
104
105 inline list_iterator& operator--()
106 {
107 members_.nodeptr_ = node_traits::get_previous(members_.nodeptr_);
108 return static_cast<list_iterator&> (*this);
109 }
110
111 inline list_iterator operator--(int)
112 {
113 list_iterator result (*this);
114 members_.nodeptr_ = node_traits::get_previous(members_.nodeptr_);
115 return result;
116 }
117
118 inline friend bool operator== (const list_iterator& l, const list_iterator& r)
119 { return l.pointed_node() == r.pointed_node(); }
120
121 inline friend bool operator!= (const list_iterator& l, const list_iterator& r)
122 { return !(l == r); }
123
124 inline reference operator*() const
125 { return *operator->(); }
126
127 inline pointer operator->() const
128 { return this->operator_arrow(detail::bool_<stateful_value_traits>()); }
129
130 inline list_iterator<ValueTraits, false> unconst() const
131 { return list_iterator<ValueTraits, false>(this->pointed_node(), this->get_value_traits()); }
132
133 private:
134 inline pointer operator_arrow(detail::false_) const
135 { return ValueTraits::to_value_ptr(members_.nodeptr_); }
136
137 inline pointer operator_arrow(detail::true_) const
138 { return this->get_value_traits()->to_value_ptr(members_.nodeptr_); }
139
140 iiterator_members<node_ptr, const_value_traits_ptr, stateful_value_traits> members_;
141};
142
143} //namespace intrusive
144} //namespace boost
145
146#endif //BOOST_INTRUSIVE_LIST_ITERATOR_HPP
147

source code of boost/libs/intrusive/include/boost/intrusive/detail/list_iterator.hpp