libstdc++

rb_tree_map_/node.hpp
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1 // -*- C++ -*-
2
3 // Copyright (C) 2005-2013 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the terms
7 // of the GNU General Public License as published by the Free Software
8 // Foundation; either version 3, or (at your option) any later
9 // version.
10
11 // This library is distributed in the hope that it will be useful, but
12 // WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 // General Public License for more details.
15
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
19
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
24
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
26
27 // Permission to use, copy, modify, sell, and distribute this software
28 // is hereby granted without fee, provided that the above copyright
29 // notice appears in all copies, and that both that copyright notice
30 // and this permission notice appear in supporting documentation. None
31 // of the above authors, nor IBM Haifa Research Laboratories, make any
32 // representation about the suitability of this software for any
33 // purpose. It is provided "as is" without express or implied
34 // warranty.
35
36 /**
37 * @file rb_tree_map_/node.hpp
38 * Contains an implementation for rb_tree_.
39 */
40
41 #ifndef PB_DS_RB_TREE_NODE_HPP
42 #define PB_DS_RB_TREE_NODE_HPP
43
44 #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
45
46 namespace __gnu_pbds
47 {
48 namespace detail
49 {
50 /// Node for Red-Black trees.
51 template<typename Value_Type, class Metadata, typename _Alloc>
52 struct rb_tree_node_
53 {
54 public:
55 typedef Value_Type value_type;
56 typedef Metadata metadata_type;
57
58 typedef
59 typename _Alloc::template rebind<
60 rb_tree_node_<
61 Value_Type,
62 Metadata,
63 _Alloc> >::other::pointer
64 node_pointer;
65
66 typedef
67 typename _Alloc::template rebind<
68 metadata_type>::other::reference
69 metadata_reference;
70
71 typedef
72 typename _Alloc::template rebind<
73 metadata_type>::other::const_reference
74 metadata_const_reference;
75
76 bool
77 special() const
78 { return m_red; }
79
80 metadata_const_reference
81 get_metadata() const
82 { return m_metadata; }
83
84 metadata_reference
85 get_metadata()
86 { return m_metadata; }
87
88 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
89 void
90 trace() const
91 {
92 std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
93 << "(" << m_metadata << ")";
94 }
95 #endif
96
97 node_pointer m_p_left;
98 node_pointer m_p_right;
99 node_pointer m_p_parent;
100 value_type m_value;
101 bool m_red;
102 metadata_type m_metadata;
103 };
104
105 template<typename Value_Type, typename _Alloc>
106 struct rb_tree_node_<Value_Type, null_type, _Alloc>
107 {
108 public:
109 typedef Value_Type value_type;
110 typedef null_type metadata_type;
111
112 typedef
113 typename _Alloc::template rebind<
114 rb_tree_node_<
115 Value_Type,
116 null_type,
117 _Alloc> >::other::pointer
118 node_pointer;
119
120 bool
121 special() const
122 { return m_red; }
123
124 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
125 void
126 trace() const
127 { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
128 #endif
129
130 node_pointer m_p_left;
131 node_pointer m_p_right;
132 node_pointer m_p_parent;
133 value_type m_value;
134 bool m_red;
135 };
136 } // namespace detail
137 } // namespace __gnu_pbds
138
139 #endif