// -*- C++ -*- // Copyright (C) 2005-2020 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 tree_policy.hpp * Contains tree-related policies. */ #ifndef PB_DS_TREE_POLICY_HPP #define PB_DS_TREE_POLICY_HPP #include <bits/c++config.h> #include <iterator> #include <ext/pb_ds/detail/type_utils.hpp> #include <ext/pb_ds/detail/branch_policy/branch_policy.hpp> namespace __gnu_pbds { #define PB_DS_CLASS_T_DEC \ template<typename Node_CItr, typename Node_Itr, typename Cmp_Fn, \ typename _Alloc> #define PB_DS_CLASS_C_DEC \ tree_order_statistics_node_update<Node_CItr, Node_Itr, Cmp_Fn, _Alloc> #define PB_DS_BRANCH_POLICY_BASE \ detail::branch_policy<Node_CItr, Node_Itr, _Alloc> /// Functor updating ranks of entrees. template<typename Node_CItr, typename Node_Itr, typename Cmp_Fn, typename _Alloc> class tree_order_statistics_node_update : private PB_DS_BRANCH_POLICY_BASE { private: typedef PB_DS_BRANCH_POLICY_BASE base_type; public: typedef Cmp_Fn cmp_fn; typedef _Alloc allocator_type; typedef typename allocator_type::size_type size_type; typedef typename base_type::key_type key_type; typedef typename base_type::key_const_reference key_const_reference; typedef size_type metadata_type; typedef Node_CItr node_const_iterator; typedef Node_Itr node_iterator; typedef typename node_const_iterator::value_type const_iterator; typedef typename node_iterator::value_type iterator; /// Finds an entry by __order. Returns a const_iterator to the /// entry with the __order order, or a const_iterator to the /// container object's end if order is at least the size of the /// container object. inline const_iterator find_by_order(size_type) const; /// Finds an entry by __order. Returns an iterator to the entry /// with the __order order, or an iterator to the container /// object's end if order is at least the size of the container /// object. inline iterator find_by_order(size_type); /// Returns the order of a key within a sequence. For exapmle, if /// r_key is the smallest key, this method will return 0; if r_key /// is a key between the smallest and next key, this method will /// return 1; if r_key is a key larger than the largest key, this /// method will return the size of r_c. inline size_type order_of_key(key_const_reference) const; private: /// Const reference to the container's value-type. typedef typename base_type::const_reference const_reference; /// Const pointer to the container's value-type. typedef typename base_type::const_pointer const_pointer; /// Const metadata reference. typedef typename detail::rebind_traits<_Alloc, metadata_type>::const_reference metadata_const_reference; /// Metadata reference. typedef typename detail::rebind_traits<_Alloc, metadata_type>::reference metadata_reference; /// Returns the node_const_iterator associated with the tree's root node. virtual node_const_iterator node_begin() const = 0; /// Returns the node_iterator associated with the tree's root node. virtual node_iterator node_begin() = 0; /// Returns the node_const_iterator associated with a just-after leaf node. virtual node_const_iterator node_end() const = 0; /// Returns the node_iterator associated with a just-after leaf node. virtual node_iterator node_end() = 0; /// Access to the cmp_fn object. virtual cmp_fn& get_cmp_fn() = 0; protected: /// Updates the rank of a node through a node_iterator node_it; /// end_nd_it is the end node iterator. inline void operator()(node_iterator, node_const_iterator) const; virtual ~tree_order_statistics_node_update(); }; #include <ext/pb_ds/detail/tree_policy/order_statistics_imp.hpp> #undef PB_DS_CLASS_T_DEC #undef PB_DS_CLASS_C_DEC #undef PB_DS_BRANCH_POLICY_BASE } // namespace __gnu_pbds #endif