libstdc++

splay_tree_/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 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
44 namespace __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
57 typename _Alloc::template rebind<
58 splay_tree_node_<Value_Type, Metadata, _Alloc> >::other::pointer
59 node_pointer;
60
61 typedef
62 typename _Alloc::template rebind<metadata_type>::other::reference
63 metadata_reference;
64
65 typedef
66 typename _Alloc::template rebind<metadata_type>::other::const_reference
67 metadata_const_reference;
68
69 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
70 void
71 trace() const
72 { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
73 #endif
74
75 inline bool
76 special() const
77 { return m_special; }
78
79 inline metadata_const_reference
80 get_metadata() const
81 { return m_metadata; }
82
83 inline metadata_reference
84 get_metadata()
85 { return m_metadata; }
86
87 value_type m_value;
88 bool m_special;
89 node_pointer m_p_left;
90 node_pointer m_p_right;
91 node_pointer m_p_parent;
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
103 typename _Alloc::template rebind<
104 splay_tree_node_<Value_Type, null_type, _Alloc> >::other::pointer
105 node_pointer;
106
107 inline bool
108 special() const
109 { return m_special; }
110
111 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
112 void
113 trace() const
114 { std::cout << PB_DS_V2F(m_value); }
115 #endif
116
117 node_pointer m_p_left;
118 node_pointer m_p_right;
119 node_pointer m_p_parent;
120 value_type m_value;
121 bool m_special;
122 };
123 } // namespace detail
124 } // namespace __gnu_pbds
125
126 #endif