1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2009, 2010 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 priority_queue.hpp 38 * Contains priority_queues. 39 */ 40 41 #ifndef PB_DS_PRIORITY_QUEUE_HPP 42 #define PB_DS_PRIORITY_QUEUE_HPP 43 44 #include <bits/c++config.h> 45 #include <ext/pb_ds/tag_and_trait.hpp> 46 #include <ext/pb_ds/detail/priority_queue_base_dispatch.hpp> 47 #include <ext/pb_ds/detail/standard_policies.hpp> 48 49 namespace __gnu_pbds 50 { 51 // A priority queue. 52 template<typename Value_Type, 53 typename Cmp_Fn = std::less<Value_Type>, 54 typename Tag = pairing_heap_tag, 55 typename Allocator = std::allocator<char> > 56 class priority_queue 57 : public detail::priority_queue_base_dispatch<Value_Type, 58 Cmp_Fn,Tag,Allocator>::type 59 { 60 private: 61 typedef typename 62 detail::priority_queue_base_dispatch<Value_Type, Cmp_Fn, 63 Tag, Allocator>::type base_type; 64 65 public: 66 typedef Value_Type value_type; 67 typedef Cmp_Fn cmp_fn; 68 typedef Tag container_category; 69 typedef Allocator allocator_type; 70 typedef typename allocator_type::size_type size_type; 71 typedef typename allocator_type::difference_type difference_type; 72 73 typedef typename allocator_type::template rebind<value_type>::other value_rebind; 74 typedef typename value_rebind::reference reference; 75 typedef typename value_rebind::const_reference const_reference; 76 typedef typename value_rebind::pointer pointer; 77 typedef typename value_rebind::const_pointer const_pointer; 78 79 typedef typename base_type::const_point_iterator const_point_iterator; 80 typedef typename base_type::point_iterator point_iterator; 81 typedef typename base_type::const_iterator const_iterator; 82 typedef typename base_type::iterator iterator; 83 84 priority_queue() { } 85 86 // Constructor taking some policy objects. r_cmp_fn will be copied 87 // by the Cmp_Fn object of the container object. 88 priority_queue(const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { } 89 90 // Constructor taking __iterators to a range of value_types. The 91 // value_types between first_it and last_it will be inserted into 92 // the container object. 93 template<typename It> 94 priority_queue(It first_it, It last_it) 95 { base_type::copy_from_range(first_it, last_it); } 96 97 // Constructor taking __iterators to a range of value_types and 98 // some policy objects The value_types between first_it and 99 // last_it will be inserted into the container object. r_cmp_fn 100 // will be copied by the cmp_fn object of the container object. 101 template<typename It> 102 priority_queue(It first_it, It last_it, const cmp_fn& r_cmp_fn) 103 : base_type(r_cmp_fn) 104 { base_type::copy_from_range(first_it, last_it); } 105 106 priority_queue(const priority_queue& other) 107 : base_type((const base_type& )other) { } 108 109 virtual 110 ~priority_queue() { } 111 112 priority_queue& 113 operator=(const priority_queue& other) 114 { 115 if (this != &other) 116 { 117 priority_queue tmp(other); 118 swap(tmp); 119 } 120 return *this; 121 } 122 123 void 124 swap(priority_queue& other) 125 { base_type::swap(other); } 126 }; 127 } // namespace __gnu_pbds 128 129 #endif 130
