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
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 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    template<typename Value_Type, class Metadata, class Allocator>
49    struct splay_tree_node_
50    {
51    public:
52      typedef Value_Type value_type;
53      typedef Metadata metadata_type;
54
55      typedef
56      typename Allocator::template rebind<
57      splay_tree_node_<Value_Type, Metadata, Allocator> >::other::pointer
58      node_pointer;
59
60      typedef
61      typename Allocator::template rebind<metadata_type>::other::reference
62      metadata_reference;
63
64      typedef
65      typename Allocator::template rebind<metadata_type>::other::const_reference
66      const_metadata_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 const_metadata_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      metadata_type m_metadata;
92    };
93
94    template<typename Value_Type, typename Allocator>
95    struct splay_tree_node_<Value_Type, null_node_metadata, Allocator>
96    {
97    public:
98      typedef Value_Type value_type;
99      typedef null_node_metadata metadata_type;
100
101      typedef
102      typename Allocator::template rebind<
103      splay_tree_node_<Value_Type, null_node_metadata, Allocator> >::other::pointer
104      node_pointer;
105
106      inline bool
107      special() const
108      { return m_special; }
109
110#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
111      void
112      trace() const
113      { std::cout << PB_DS_V2F(m_value); }
114#endif
115
116      node_pointer m_p_left;
117      node_pointer m_p_right;
118      node_pointer m_p_parent;
119      value_type m_value;
120      bool m_special;
121    };
122  } // namespace detail
123} // namespace __gnu_pbds
124
125#endif
126