libstdc++: node.hpp Source File

libstdc++

splay_tree_/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
33// purpose. It is provided "as is" without express or implied
34// warranty.
35
36/**
37 * @file splay_tree_/node.hpp
38 * Contains an implementation struct for splay_tree_'s node.
39 */
40
41#ifndef PB_DS_SPLAY_TREE_NODE_HPP
42#define PB_DS_SPLAY_TREE_NODE_HPP
43
44namespace __gnu_pbds
45{
46 namespace detail
47 {
48 /// Node for splay tree.
49 template<typename Value_Type, class Metadata, typename _Alloc>
50 struct splay_tree_node_
51 {
52 public:
53 typedef Value_Type value_type;
54 typedef Metadata metadata_type;
55
56 typedef typename rebind_traits<_Alloc, splay_tree_node_>::pointer
57 node_pointer;
58
59 typedef typename rebind_traits<_Alloc, splay_tree_node_>::size_type
60 size_type;
61
62 typedef typename rebind_traits<_Alloc, metadata_type>::reference
63 metadata_reference;
64
65 typedef typename rebind_traits<_Alloc, metadata_type>::const_reference
66 metadata_const_reference;
67
68#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
69 void
70 trace() const
71 { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
72#endif
73
74 inline bool
75 special() const
76 { return m_special; }
77
78 inline metadata_const_reference
79 get_metadata() const
80 { return m_metadata; }
81
82 inline metadata_reference
83 get_metadata()
84 { return m_metadata; }
85
86 value_type m_value;
87 bool m_special;
88 node_pointer m_p_left;
89 node_pointer m_p_right;
90 node_pointer m_p_parent;
91 size_type m_subtree_size;
92 metadata_type m_metadata;
93 };
94
95 template<typename Value_Type, typename _Alloc>
96 struct splay_tree_node_<Value_Type, null_type, _Alloc>
97 {
98 public:
99 typedef Value_Type value_type;
100 typedef null_type metadata_type;
101
102 typedef typename rebind_traits<_Alloc, splay_tree_node_>::pointer
103 node_pointer;
104
105 typedef typename rebind_traits<_Alloc, splay_tree_node_>::size_type
106 size_type;
107
108 inline bool
109 special() const
110 { return m_special; }
111
112#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
113 void
114 trace() const
115 { std::cout << PB_DS_V2F(m_value); }
116#endif
117
118 node_pointer m_p_left;
119 node_pointer m_p_right;
120 node_pointer m_p_parent;
121 size_type m_subtree_size;
122 value_type m_value;
123 bool m_special;
124 };
125 } // namespace detail
126} // namespace __gnu_pbds
127
128#endif
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::splay_tree_node_
Node for splay tree.
Definition splay_tree_/node.hpp:51