1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2007-2013
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/intrusive for documentation.
//
/////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTRUSIVE_TREE_NODE_HPP
#define BOOST_INTRUSIVE_TREE_NODE_HPP
#include <boost/intrusive/detail/config_begin.hpp>
#include <iterator>
#include <boost/intrusive/detail/utilities.hpp>
#include <boost/intrusive/options.hpp>
#include <boost/intrusive/pointer_traits.hpp>
#include <boost/intrusive/detail/mpl.hpp>
#include <boost/intrusive/bstree_algorithms.hpp>
namespace boost {
namespace intrusive {
template<class VoidPointer>
struct tree_node
{
typedef typename pointer_traits
<VoidPointer>::template rebind_pointer
<tree_node<VoidPointer> >::type node_ptr;
node_ptr parent_, left_, right_;
};
template<class VoidPointer>
struct tree_node_traits
{
typedef tree_node<VoidPointer> node;
typedef typename pointer_traits<VoidPointer>::template
rebind_pointer<node>::type node_ptr;
typedef typename pointer_traits<VoidPointer>::template
rebind_pointer<const node>::type const_node_ptr;
static node_ptr get_parent(const const_node_ptr & n)
{ return n->parent_; }
static node_ptr get_parent(const node_ptr & n)
{ return n->parent_; }
static void set_parent(const node_ptr & n, const node_ptr & p)
{ n->parent_ = p; }
static node_ptr get_left(const const_node_ptr & n)
{ return n->left_; }
static node_ptr get_left(const node_ptr & n)
{ return n->left_; }
static void set_left(const node_ptr & n, const node_ptr & l)
{ n->left_ = l; }
static node_ptr get_right(const const_node_ptr & n)
{ return n->right_; }
static node_ptr get_right(const node_ptr & n)
{ return n->right_; }
static void set_right(const node_ptr & n, const node_ptr & r)
{ n->right_ = r; }
};
/////////////////////////////////////////////////////////////////////////////
// //
// Implementation of the tree iterator //
// //
/////////////////////////////////////////////////////////////////////////////
// tree_iterator provides some basic functions for a
// node oriented bidirectional iterator:
template<class ValueTraits, bool IsConst>
class tree_iterator
{
protected:
typedef iiterator< ValueTraits, IsConst
, std::bidirectional_iterator_tag> types_t;
typedef ValueTraits value_traits;
typedef typename types_t::node_traits node_traits;
typedef typename types_t::node node;
typedef typename types_t::node_ptr node_ptr;
typedef typename types_t::const_value_traits_ptr const_value_traits_ptr;
static const bool stateful_value_traits = types_t::stateful_value_traits;
typedef bstree_algorithms<node_traits> node_algorithms;
public:
typedef typename types_t::iterator_traits::difference_type difference_type;
typedef typename types_t::iterator_traits::value_type value_type;
typedef typename types_t::iterator_traits::pointer pointer;
typedef typename types_t::iterator_traits::reference reference;
typedef typename types_t::iterator_traits::iterator_category iterator_category;
tree_iterator()
{}
explicit tree_iterator(const node_ptr & nodeptr, const const_value_traits_ptr &traits_ptr)
: members_(nodeptr, traits_ptr)
{}
tree_iterator(tree_iterator<value_traits, false> const& other)
: members_(other.pointed_node(), other.get_value_traits())
{}
const node_ptr &pointed_node() const
{ return members_.nodeptr_; }
tree_iterator &operator=(const node_ptr &nodeptr)
{ members_.nodeptr_ = nodeptr; return static_cast<tree_iterator&>(*this); }
public:
tree_iterator& operator++()
{
members_.nodeptr_ = node_algorithms::next_node(members_.nodeptr_);
return static_cast<tree_iterator&> (*this);
}
tree_iterator operator++(int)
{
tree_iterator result (*this);
members_.nodeptr_ = node_algorithms::next_node(members_.nodeptr_);
return result;
}
tree_iterator& operator--()
{
members_.nodeptr_ = node_algorithms::prev_node(members_.nodeptr_);
return static_cast<tree_iterator&> (*this);
}
tree_iterator operator--(int)
{
tree_iterator result (*this);
members_.nodeptr_ = node_algorithms::prev_node(members_.nodeptr_);
return result;
}
friend bool operator== (const tree_iterator& l, const tree_iterator& r)
{ return l.pointed_node() == r.pointed_node(); }
friend bool operator!= (const tree_iterator& l, const tree_iterator& r)
{ return !(l == r); }
reference operator*() const
{ return *operator->(); }
pointer operator->() const
{ return this->operator_arrow(detail::bool_<stateful_value_traits>()); }
const_value_traits_ptr get_value_traits() const
{ return members_.get_ptr(); }
tree_iterator end_iterator_from_it() const
{
return tree_iterator(node_algorithms::get_header(this->pointed_node()), this->get_value_traits());
}
tree_iterator<value_traits, false> unconst() const
{ return tree_iterator<value_traits, false>(this->pointed_node(), this->get_value_traits()); }
private:
pointer operator_arrow(detail::false_) const
{ return ValueTraits::to_value_ptr(members_.nodeptr_); }
pointer operator_arrow(detail::true_) const
{ return this->get_value_traits()->to_value_ptr(members_.nodeptr_); }
iiterator_members<node_ptr, const_value_traits_ptr, stateful_value_traits> members_;
};
} //namespace intrusive
} //namespace boost
#include <boost/intrusive/detail/config_end.hpp>
#endif //BOOST_INTRUSIVE_TREE_NODE_HPP
|
