1 // -*- C++ -*- 2 3 // Copyright (C) 2005-2018 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 bin_search_tree_/node_iterators.hpp 38 * Contains an implementation class for bin_search_tree_. 39 */ 40 41 #ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP 42 #define PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP 43 44 #include <ext/pb_ds/tag_and_trait.hpp> 45 46 namespace __gnu_pbds 47 { 48 namespace detail 49 { 50 #define PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC \ 51 bin_search_tree_const_node_it_<Node, Const_Iterator, Iterator, _Alloc> 52 53 /// Const node iterator. 54 template<typename Node, 55 class Const_Iterator, 56 class Iterator, 57 typename _Alloc> 58 class bin_search_tree_const_node_it_ 59 { 60 private: 61 typedef 62 typename _Alloc::template rebind< 63 Node>::other::pointer 64 node_pointer; 65 66 public: 67 /// Category. 68 typedef trivial_iterator_tag iterator_category; 69 70 /// Difference type. 71 typedef trivial_iterator_difference_type difference_type; 72 73 /// Iterator's value type. 74 typedef Const_Iterator value_type; 75 76 /// Iterator's reference type. 77 typedef Const_Iterator reference; 78 79 /// Iterator's __const reference type. 80 typedef Const_Iterator const_reference; 81 82 /// Metadata type. 83 typedef typename Node::metadata_type metadata_type; 84 85 /// Const metadata reference type. 86 typedef 87 typename _Alloc::template rebind<metadata_type>::other::const_reference 88 metadata_const_reference; 89 90 91 bin_search_tree_const_node_it_(const node_pointer p_nd = 0) 92 : m_p_nd(const_cast<node_pointer>(p_nd)) 93 { } 94 95 /// Access. 96 const_reference 97 operator*() const 98 { return Const_Iterator(m_p_nd); } 99 100 /// Metadata access. 101 metadata_const_reference 102 get_metadata() const 103 { return m_p_nd->get_metadata(); } 104 105 /// Returns the __const node iterator associated with the left node. 106 PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC 107 get_l_child() const 108 { return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_left); } 109 110 /// Returns the __const node iterator associated with the right node. 111 PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC 112 get_r_child() const 113 { return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_right); } 114 115 /// Compares to a different iterator object. 116 bool 117 operator==(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const 118 { return m_p_nd == other.m_p_nd; } 119 120 /// Compares (negatively) to a different iterator object. 121 bool 122 operator!=(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const 123 { return m_p_nd != other.m_p_nd; } 124 125 node_pointer m_p_nd; 126 }; 127 128 #define PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC \ 129 bin_search_tree_node_it_<Node, Const_Iterator, Iterator, _Alloc> 130 131 /// Node iterator. 132 template<typename Node, 133 class Const_Iterator, 134 class Iterator, 135 typename _Alloc> 136 class bin_search_tree_node_it_ 137 : public PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC 138 { 139 private: 140 typedef 141 typename _Alloc::template rebind< 142 Node>::other::pointer 143 node_pointer; 144 145 public: 146 /// Iterator's value type. 147 typedef Iterator value_type; 148 149 /// Iterator's reference type. 150 typedef Iterator reference; 151 152 /// Iterator's __const reference type. 153 typedef Iterator const_reference; 154 155 inline 156 bin_search_tree_node_it_(const node_pointer p_nd = 0) 157 : PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(const_cast<node_pointer>(p_nd)) 158 { } 159 160 /// Access. 161 Iterator 162 operator*() const 163 { return Iterator(PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd); } 164 165 /// Returns the node iterator associated with the left node. 166 PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC 167 get_l_child() const 168 { 169 return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC( 170 PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_left); 171 } 172 173 /// Returns the node iterator associated with the right node. 174 PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC 175 get_r_child() const 176 { 177 return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC( 178 PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_right); 179 } 180 181 }; 182 183 #undef PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC 184 #undef PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC 185 186 } // namespace detail 187 } // namespace __gnu_pbds 188 189 #endif // #ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP 190