1 // -*- C++ -*-
2 
3 // Copyright (C) 2005-2021 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 typename rebind_traits<_Alloc, splay_tree_node_>::pointer
57 	node_pointer;
58 
59       typedef typename rebind_traits<_Alloc, metadata_type>::reference
60 	metadata_reference;
61 
62       typedef typename rebind_traits<_Alloc, metadata_type>::const_reference
63 	metadata_const_reference;
64 
65 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
66       void
trace__gnu_pbds::detail::splay_tree_node_67       trace() const
68       { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
69 #endif
70 
71       inline bool
special__gnu_pbds::detail::splay_tree_node_72       special() const
73       { return m_special; }
74 
75       inline metadata_const_reference
get_metadata__gnu_pbds::detail::splay_tree_node_76       get_metadata() const
77       { return m_metadata; }
78 
79       inline metadata_reference
get_metadata__gnu_pbds::detail::splay_tree_node_80       get_metadata()
81       { return m_metadata; }
82 
83       value_type m_value;
84       bool m_special;
85       node_pointer m_p_left;
86       node_pointer m_p_right;
87       node_pointer m_p_parent;
88       metadata_type m_metadata;
89     };
90 
91     template<typename Value_Type, typename _Alloc>
92     struct splay_tree_node_<Value_Type, null_type, _Alloc>
93     {
94     public:
95       typedef Value_Type value_type;
96       typedef null_type metadata_type;
97 
98       typedef typename rebind_traits<_Alloc, splay_tree_node_>::pointer
99 	node_pointer;
100 
101       inline bool
special__gnu_pbds::detail::splay_tree_node_102       special() const
103       { return m_special; }
104 
105 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
106       void
trace__gnu_pbds::detail::splay_tree_node_107       trace() const
108       { std::cout << PB_DS_V2F(m_value); }
109 #endif
110 
111       node_pointer m_p_left;
112       node_pointer m_p_right;
113       node_pointer m_p_parent;
114       value_type m_value;
115       bool m_special;
116     };
117   } // namespace detail
118 } // namespace __gnu_pbds
119 
120 #endif
121