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
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
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
127