Edit File: node_iterators.hpp
// -*- C++ -*- // Copyright (C) 2005-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the terms // of the GNU General Public License as published by the Free Software // Foundation; either version 3, or (at your option) any later // version. // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. // Permission to use, copy, modify, sell, and distribute this software // is hereby granted without fee, provided that the above copyright // notice appears in all copies, and that both that copyright notice // and this permission notice appear in supporting documentation. None // of the above authors, nor IBM Haifa Research Laboratories, make any // representation about the suitability of this software for any // purpose. It is provided "as is" without express or implied // warranty. /** * @file bin_search_tree_/node_iterators.hpp * Contains an implementation class for bin_search_tree_. */ #ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP #define PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP #include <ext/pb_ds/tag_and_trait.hpp> namespace __gnu_pbds { namespace detail { #define PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC \ bin_search_tree_const_node_it_<Node, Const_Iterator, Iterator, _Alloc> /// Const node iterator. template<typename Node, class Const_Iterator, class Iterator, typename _Alloc> class bin_search_tree_const_node_it_ { private: typedef typename _Alloc::template rebind< Node>::other::pointer node_pointer; public: /// Category. typedef trivial_iterator_tag iterator_category; /// Difference type. typedef trivial_iterator_difference_type difference_type; /// Iterator's value type. typedef Const_Iterator value_type; /// Iterator's reference type. typedef Const_Iterator reference; /// Iterator's __const reference type. typedef Const_Iterator const_reference; /// Metadata type. typedef typename Node::metadata_type metadata_type; /// Const metadata reference type. typedef typename _Alloc::template rebind<metadata_type>::other::const_reference metadata_const_reference; bin_search_tree_const_node_it_(const node_pointer p_nd = 0) : m_p_nd(const_cast<node_pointer>(p_nd)) { } /// Access. const_reference operator*() const { return Const_Iterator(m_p_nd); } /// Metadata access. metadata_const_reference get_metadata() const { return m_p_nd->get_metadata(); } /// Returns the __const node iterator associated with the left node. PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC get_l_child() const { return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_left); } /// Returns the __const node iterator associated with the right node. PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC get_r_child() const { return PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(m_p_nd->m_p_right); } /// Compares to a different iterator object. bool operator==(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const { return m_p_nd == other.m_p_nd; } /// Compares (negatively) to a different iterator object. bool operator!=(const PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC& other) const { return m_p_nd != other.m_p_nd; } node_pointer m_p_nd; }; #define PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC \ bin_search_tree_node_it_<Node, Const_Iterator, Iterator, _Alloc> /// Node iterator. template<typename Node, class Const_Iterator, class Iterator, typename _Alloc> class bin_search_tree_node_it_ : public PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC { private: typedef typename _Alloc::template rebind< Node>::other::pointer node_pointer; public: /// Iterator's value type. typedef Iterator value_type; /// Iterator's reference type. typedef Iterator reference; /// Iterator's __const reference type. typedef Iterator const_reference; inline bin_search_tree_node_it_(const node_pointer p_nd = 0) : PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC(const_cast<node_pointer>(p_nd)) { } /// Access. Iterator operator*() const { return Iterator(PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd); } /// Returns the node iterator associated with the left node. PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC get_l_child() const { return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC( PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_left); } /// Returns the node iterator associated with the right node. PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC get_r_child() const { return PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC( PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC::m_p_nd->m_p_right); } }; #undef PB_DS_TREE_CONST_NODE_ITERATOR_CLASS_C_DEC #undef PB_DS_TREE_NODE_ITERATOR_CLASS_C_DEC } // namespace detail } // namespace __gnu_pbds #endif // #ifndef PB_DS_BIN_SEARCH_TREE_NODE_ITERATORS_HPP
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