3 // Copyright (C) 2005, 2006, 2009, 2010 Free Software Foundation, Inc.
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
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.
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.
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/>.
25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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
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32 // representation about the suitability of this software for any
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37 * @file priority_queue.hpp
38 * Contains priority_queues.
41 #ifndef PB_DS_PRIORITY_QUEUE_HPP
42 #define PB_DS_PRIORITY_QUEUE_HPP
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>
52 * @brief A priority queue composed of one specific heap policy.
55 template<typename _Tv,
56 typename Cmp_Fn = std::less<_Tv>,
57 typename Tag = pairing_heap_tag,
58 typename _Alloc = std::allocator<char> >
60 : public detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc, Tag>::type
63 typedef _Tv value_type;
64 typedef Cmp_Fn cmp_fn;
65 typedef Tag container_category;
66 typedef _Alloc allocator_type;
67 typedef typename allocator_type::size_type size_type;
68 typedef typename allocator_type::difference_type difference_type;
71 typedef typename detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc,
74 typedef typename _Alloc::template rebind<_Tv> __rebind_v;
75 typedef typename __rebind_v::other __rebind_va;
78 typedef typename __rebind_va::reference reference;
79 typedef typename __rebind_va::const_reference const_reference;
80 typedef typename __rebind_va::pointer pointer;
81 typedef typename __rebind_va::const_pointer const_pointer;
83 typedef typename base_type::point_iterator point_iterator;
84 typedef typename base_type::point_const_iterator point_const_iterator;
85 typedef typename base_type::iterator iterator;
86 typedef typename base_type::const_iterator const_iterator;
90 // Constructor taking some policy objects. r_cmp_fn will be copied
91 // by the Cmp_Fn object of the container object.
92 priority_queue(const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { }
94 // Constructor taking __iterators to a range of value_types. The
95 // value_types between first_it and last_it will be inserted into
96 // the container object.
98 priority_queue(It first_it, It last_it)
99 { base_type::copy_from_range(first_it, last_it); }
101 // Constructor taking __iterators to a range of value_types and
102 // some policy objects The value_types between first_it and
103 // last_it will be inserted into the container object. r_cmp_fn
104 // will be copied by the cmp_fn object of the container object.
105 template<typename It>
106 priority_queue(It first_it, It last_it, const cmp_fn& r_cmp_fn)
107 : base_type(r_cmp_fn)
108 { base_type::copy_from_range(first_it, last_it); }
110 priority_queue(const priority_queue& other)
111 : base_type((const base_type& )other) { }
114 ~priority_queue() { }
117 operator=(const priority_queue& other)
121 priority_queue tmp(other);
128 swap(priority_queue& other)
129 { base_type::swap(other); }
131 } // namespace __gnu_pbds