1// -*- C++ -*-
2
3// Copyright (C) 2005, 2006 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 2, 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// You should have received a copy of the GNU General Public License
17// along with this library; see the file COPYING.  If not, write to
18// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
19// MA 02111-1307, USA.
20
21// As a special exception, you may use this file as part of a free
22// software library without restriction.  Specifically, if other files
23// instantiate templates or use macros or inline functions from this
24// file, or you compile this file and link it with other files to
25// produce an executable, this file does not by itself cause the
26// resulting executable to be covered by the GNU General Public
27// License.  This exception does not however invalidate any other
28// reasons why the executable file might be covered by the GNU General
29// Public License.
30
31// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
32
33// Permission to use, copy, modify, sell, and distribute this software
34// is hereby granted without fee, provided that the above copyright
35// notice appears in all copies, and that both that copyright notice
36// and this permission notice appear in supporting documentation. None
37// of the above authors, nor IBM Haifa Research Laboratories, make any
38// representation about the suitability of this software for any
39// purpose. It is provided "as is" without express or implied
40// warranty.
41
42/**
43 * @file node.hpp
44 * Contains an implementation struct for splay_tree_'s node.
45 */
46
47#ifndef PB_DS_SPLAY_TREE_NODE_HPP
48#define PB_DS_SPLAY_TREE_NODE_HPP
49
50namespace pb_ds
51{
52  namespace detail
53  {
54    template<typename Value_Type, class Metadata, class Allocator>
55    struct splay_tree_node_
56    {
57    public:
58      typedef Value_Type value_type;
59      typedef Metadata metadata_type;
60
61      typedef
62      typename Allocator::template rebind<
63      splay_tree_node_<Value_Type, Metadata, Allocator> >::other::pointer
64      node_pointer;
65
66      typedef
67      typename Allocator::template rebind<metadata_type>::other::reference
68      metadata_reference;
69
70      typedef
71      typename Allocator::template rebind<metadata_type>::other::const_reference
72      const_metadata_reference;
73
74#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
75      void
76      trace() const
77      { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
78#endif
79
80      inline bool
81      special() const
82      { return m_special; }
83
84      inline const_metadata_reference
85      get_metadata() const
86      { return m_metadata; }
87
88      inline metadata_reference
89      get_metadata()
90      { return m_metadata; }
91
92      value_type m_value;
93      bool m_special;
94      node_pointer m_p_left;
95      node_pointer m_p_right;
96      node_pointer m_p_parent;
97      metadata_type m_metadata;
98    };
99
100    template<typename Value_Type, typename Allocator>
101    struct splay_tree_node_<Value_Type, null_node_metadata, Allocator>
102    {
103    public:
104      typedef Value_Type value_type;
105      typedef null_node_metadata metadata_type;
106
107      typedef
108      typename Allocator::template rebind<
109      splay_tree_node_<Value_Type, null_node_metadata, Allocator> >::other::pointer
110      node_pointer;
111
112      inline bool
113      special() const
114      { return m_special; }
115
116#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
117      void
118      trace() const
119      { std::cout << PB_DS_V2F(m_value); }
120#endif
121
122      node_pointer m_p_left;
123      node_pointer m_p_right;
124      node_pointer m_p_parent;
125      value_type m_value;
126      bool m_special;
127    };
128  } // namespace detail
129} // namespace pb_ds
130
131#endif
132