libstdc++
splay_tree_/node.hpp
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1 // -*- C++ -*-
2 
3 // Copyright (C) 2005, 2006, 2009 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
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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>
51  {
52  public:
53  typedef Value_Type value_type;
54  typedef Metadata metadata_type;
55 
56  typedef
57  typename _Alloc::template rebind<
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<
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