libstdc++: node.hpp Source File

libstdc++

rb_tree_map_/node.hpp
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1// -*- C++ -*-
2
3// Copyright (C) 2005-2026 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
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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
46namespace __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 typename rebind_traits<_Alloc, rb_tree_node_>::pointer
59 node_pointer;
60
61 typedef typename rebind_traits<_Alloc, rb_tree_node_>::size_type
62 size_type;
63
64 typedef typename rebind_traits<_Alloc, metadata_type>::reference
65 metadata_reference;
66
67 typedef typename rebind_traits<_Alloc, metadata_type>::const_reference
68 metadata_const_reference;
69
70 bool
71 special() const
72 { return m_red; }
73
74 metadata_const_reference
75 get_metadata() const
76 { return m_metadata; }
77
78 metadata_reference
79 get_metadata()
80 { return m_metadata; }
81
82#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
83 void
84 trace() const
85 {
86 std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
87 << "(" << m_metadata << ")";
88 }
89#endif
90
91 node_pointer m_p_left;
92 node_pointer m_p_right;
93 node_pointer m_p_parent;
94 size_type m_subtree_size;
95 value_type m_value;
96 bool m_red;
97 metadata_type m_metadata;
98 };
99
100 template<typename Value_Type, typename _Alloc>
101 struct rb_tree_node_<Value_Type, null_type, _Alloc>
102 {
103 public:
104 typedef Value_Type value_type;
105 typedef null_type metadata_type;
106
107 typedef typename rebind_traits<_Alloc, rb_tree_node_>::size_type
108 size_type;
109
110 typedef typename rebind_traits<_Alloc, rb_tree_node_>::pointer
111 node_pointer;
112
113 bool
114 special() const
115 { return m_red; }
116
117#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
118 void
119 trace() const
120 { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
121#endif
122
123 node_pointer m_p_left;
124 node_pointer m_p_right;
125 node_pointer m_p_parent;
126 size_type m_subtree_size;
127 value_type m_value;
128 bool m_red;
129 };
130 } // namespace detail
131} // namespace __gnu_pbds
132
133#endif
null_node_metadata.hpp
std::cout
ostream cout
Linked to standard output.
__gnu_pbds
GNU extensions for policy-based data structures for public use.
Definition assoc_container.hpp:52
__gnu_pbds::null_type
Represents no type, or absence of type, for template tricks.
Definition tag_and_trait.hpp:210
__gnu_pbds::detail::rebind_traits
Consistent API for accessing allocator-related types.
Definition types_traits.hpp:140
__gnu_pbds::detail::value_type
__gnu_pbds::detail::rb_tree_node_
Node for Red-Black trees.
Definition rb_tree_map_/node.hpp:53