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 rb_tree_map_/node.hpp 38 * Contains an implementation for rb_tree_. 39 */ 40 41 #ifndef PB_DS_RB_TREE_NODE_HPP 42 #define PB_DS_RB_TREE_NODE_HPP 43 44 #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp> 45 46 namespace __gnu_pbds 47 { 48 namespace detail 49 { 50 /// Node for Red-Black trees. 51 template<typename Value_Type, class Metadata, typename _Alloc> 52 struct rb_tree_node_ 53 { 54 public: 55 typedef Value_Type value_type; 56 typedef Metadata metadata_type; 57 58 typedef 59 typename _Alloc::template rebind< 60 rb_tree_node_< 61 Value_Type, 62 Metadata, 63 _Alloc> >::other::pointer 64 node_pointer; 65 66 typedef 67 typename _Alloc::template rebind< 68 metadata_type>::other::reference 69 metadata_reference; 70 71 typedef 72 typename _Alloc::template rebind< 73 metadata_type>::other::const_reference 74 metadata_const_reference; 75 76 bool 77 special() const 78 { return m_red; } 79 80 metadata_const_reference 81 get_metadata() const 82 { return m_metadata; } 83 84 metadata_reference 85 get_metadata() 86 { return m_metadata; } 87 88 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_ 89 void 90 trace() const 91 { 92 std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ") 93 << "(" << m_metadata << ")"; 94 } 95 #endif 96 97 node_pointer m_p_left; 98 node_pointer m_p_right; 99 node_pointer m_p_parent; 100 value_type m_value; 101 bool m_red; 102 metadata_type m_metadata; 103 }; 104 105 template<typename Value_Type, typename _Alloc> 106 struct rb_tree_node_<Value_Type, null_type, _Alloc> 107 { 108 public: 109 typedef Value_Type value_type; 110 typedef null_type metadata_type; 111 112 typedef 113 typename _Alloc::template rebind< 114 rb_tree_node_< 115 Value_Type, 116 null_type, 117 _Alloc> >::other::pointer 118 node_pointer; 119 120 bool 121 special() const 122 { return m_red; } 123 124 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_ 125 void 126 trace() const 127 { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); } 128 #endif 129 130 node_pointer m_p_left; 131 node_pointer m_p_right; 132 node_pointer m_p_parent; 133 value_type m_value; 134 bool m_red; 135 }; 136 } // namespace detail 137 } // namespace __gnu_pbds 138 139 #endif 140
