1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License 17 // along with this library; see the file COPYING. If not, write to 18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19 // MA 02111-1307, USA. 20 21 // As a special exception, you may use this file as part of a free 22 // software library without restriction. Specifically, if other files 23 // instantiate templates or use macros or inline functions from this 24 // file, or you compile this file and link it with other files to 25 // produce an executable, this file does not by itself cause the 26 // resulting executable to be covered by the GNU General Public 27 // License. This exception does not however invalidate any other 28 // reasons why the executable file might be covered by the GNU General 29 // Public License. 30 31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33 // Permission to use, copy, modify, sell, and distribute this software 34 // is hereby granted without fee, provided that the above copyright 35 // notice appears in all copies, and that both that copyright notice 36 // and this permission notice appear in supporting documentation. None 37 // of the above authors, nor IBM Haifa Research Laboratories, make any 38 // representation about the suitability of this software for any 39 // purpose. It is provided "as is" without express or implied 40 // warranty. 41 42 /** 43 * @file priority_queue.hpp 44 * Contains priority_queues. 45 */ 46 47 #ifndef PB_DS_PRIORITY_QUEUE_HPP 48 #define PB_DS_PRIORITY_QUEUE_HPP 49 50 #include <ext/pb_ds/tag_and_trait.hpp> 51 #include <ext/pb_ds/detail/priority_queue_base_dispatch.hpp> 52 #include <ext/pb_ds/detail/standard_policies.hpp> 53 54 namespace pb_ds 55 { 56 // A priority queue. 57 template<typename Value_Type, 58 typename Cmp_Fn = std::less<Value_Type>, 59 typename Tag = pairing_heap_tag, 60 typename Allocator = std::allocator<char> > 61 class priority_queue 62 : public detail::priority_queue_base_dispatch<Value_Type,Cmp_Fn,Tag,Allocator>::type 63 { 64 private: 65 typedef typename detail::priority_queue_base_dispatch<Value_Type,Cmp_Fn,Tag,Allocator>::type base_type; 66 67 public: 68 typedef Value_Type value_type; 69 typedef Cmp_Fn cmp_fn; 70 typedef Tag container_category; 71 typedef Allocator allocator; 72 typedef typename allocator::size_type size_type; 73 typedef typename allocator::difference_type difference_type; 74 75 typedef typename allocator::template rebind<value_type>::other value_rebind; 76 typedef typename value_rebind::reference reference; 77 typedef typename value_rebind::const_reference const_reference; 78 typedef typename value_rebind::pointer pointer; 79 typedef typename value_rebind::const_pointer const_pointer; 80 81 typedef typename base_type::const_point_iterator const_point_iterator; 82 typedef typename base_type::point_iterator point_iterator; 83 typedef typename base_type::const_iterator const_iterator; 84 typedef typename base_type::iterator iterator; 85 priority_queue()86 priority_queue() { } 87 88 // Constructor taking some policy objects. r_cmp_fn will be copied 89 // by the Cmp_Fn object of the container object. priority_queue(const cmp_fn & r_cmp_fn)90 priority_queue(const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { } 91 92 // Constructor taking __iterators to a range of value_types. The 93 // value_types between first_it and last_it will be inserted into 94 // the container object. 95 template<typename It> priority_queue(It first_it,It last_it)96 priority_queue(It first_it, It last_it) 97 { base_type::copy_from_range(first_it, last_it); } 98 99 // Constructor taking __iterators to a range of value_types and 100 // some policy objects The value_types between first_it and 101 // last_it will be inserted into the container object. r_cmp_fn 102 // will be copied by the cmp_fn object of the container object. 103 template<typename It> priority_queue(It first_it,It last_it,const cmp_fn & r_cmp_fn)104 priority_queue(It first_it, It last_it, const cmp_fn& r_cmp_fn) 105 : base_type(r_cmp_fn) 106 { base_type::copy_from_range(first_it, last_it); } 107 priority_queue(const priority_queue & other)108 priority_queue(const priority_queue& other) 109 : base_type((const base_type& )other) { } 110 111 virtual ~priority_queue()112 ~priority_queue() { } 113 114 priority_queue& operator =(const priority_queue & other)115 operator=(const priority_queue& other) 116 { 117 if (this !=& other) 118 { 119 priority_queue tmp(other); 120 swap(tmp); 121 } 122 return *this; 123 } 124 125 void swap(priority_queue & other)126 swap(priority_queue& other) 127 { base_type::swap(other); } 128 }; 129 } // namespace pb_ds 130 131 #endif 132