Filename: //usr/include/c++/10//ext/pb_ds//priority_queue.hpp

// -*- 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 priority_queue.hpp * Contains priority_queues. */ #ifndef PB_DS_PRIORITY_QUEUE_HPP #define PB_DS_PRIORITY_QUEUE_HPP #include <bits/c++config.h> #include <ext/pb_ds/tag_and_trait.hpp> #include <ext/pb_ds/detail/priority_queue_base_dispatch.hpp> #include <ext/pb_ds/detail/standard_policies.hpp> namespace __gnu_pbds { /** * @defgroup heap-based Heap-Based * @ingroup containers-pbds * @{ */ /** * @defgroup heap-detail Base and Policy Classes * @ingroup heap-based */ /** * A priority queue composed of one specific heap policy. * * @tparam _Tv Value type. * @tparam Cmp_Fn Comparison functor. * @tparam Tag Instantiating data structure type, * see container_tag. * @tparam _Alloc Allocator type. * * Base is dispatched at compile time via Tag, from the following * choices: binary_heap_tag, binomial_heap_tag, pairing_heap_tag, * rc_binomial_heap_tag, thin_heap_tag * * Base choices are: detail::binary_heap, detail::binomial_heap, * detail::pairing_heap, detail::rc_binomial_heap, * detail::thin_heap. */ template<typename _Tv, typename Cmp_Fn = std::less<_Tv>, typename Tag = pairing_heap_tag, typename _Alloc = std::allocator<char> > class priority_queue : public detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc, Tag>::type { public: typedef _Tv value_type; typedef Cmp_Fn cmp_fn; typedef Tag container_category; typedef _Alloc allocator_type; typedef typename allocator_type::size_type size_type; typedef typename allocator_type::difference_type difference_type; private: typedef typename detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc, Tag>::type base_type; typedef detail::rebind_traits<_Alloc, _Tv> __rebind_va; public: typedef typename __rebind_va::reference reference; typedef typename __rebind_va::const_reference const_reference; typedef typename __rebind_va::pointer pointer; typedef typename __rebind_va::const_pointer const_pointer; typedef typename base_type::point_iterator point_iterator; typedef typename base_type::point_const_iterator point_const_iterator; typedef typename base_type::iterator iterator; typedef typename base_type::const_iterator const_iterator; priority_queue() { } /// Constructor taking some policy objects. r_cmp_fn will be /// copied by the Cmp_Fn object of the container object. priority_queue(const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { } /// Constructor taking __iterators to a range of value_types. The /// value_types between first_it and last_it will be inserted into /// the container object. template<typename It> priority_queue(It first_it, It last_it) { base_type::copy_from_range(first_it, last_it); } /// Constructor taking __iterators to a range of value_types and /// some policy objects The value_types between first_it and /// last_it will be inserted into the container object. r_cmp_fn /// will be copied by the cmp_fn object of the container object. template<typename It> priority_queue(It first_it, It last_it, const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { base_type::copy_from_range(first_it, last_it); } priority_queue(const priority_queue& other) : base_type((const base_type& )other) { } virtual ~priority_queue() { } priority_queue& operator=(const priority_queue& other) { if (this != &other) { priority_queue tmp(other); swap(tmp); } return *this; } void swap(priority_queue& other) { base_type::swap(other); } }; } // namespace __gnu_pbds //@} heap-based #endif

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