forked from KolibriOS/kolibrios
158 lines
5.4 KiB
C++
158 lines
5.4 KiB
C++
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// -*- C++ -*-
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// Copyright (C) 2005-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the terms
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// of the GNU General Public License as published by the Free Software
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// Foundation; either version 3, or (at your option) any later
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// version.
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// This library is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
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// Permission to use, copy, modify, sell, and distribute this software
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// is hereby granted without fee, provided that the above copyright
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// notice appears in all copies, and that both that copyright notice
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// and this permission notice appear in supporting documentation. None
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// of the above authors, nor IBM Haifa Research Laboratories, make any
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// representation about the suitability of this software for any
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// purpose. It is provided "as is" without express or implied
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// warranty.
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/**
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* @file priority_queue.hpp
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* Contains priority_queues.
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*/
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#ifndef PB_DS_PRIORITY_QUEUE_HPP
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#define PB_DS_PRIORITY_QUEUE_HPP
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#include <bits/c++config.h>
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#include <ext/pb_ds/tag_and_trait.hpp>
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#include <ext/pb_ds/detail/priority_queue_base_dispatch.hpp>
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#include <ext/pb_ds/detail/standard_policies.hpp>
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namespace __gnu_pbds
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{
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/**
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* @defgroup heap-based Heap-Based
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* @ingroup containers-pbds
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* @{
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*/
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/**
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* @defgroup heap-detail Base and Policy Classes
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* @ingroup heap-based
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*/
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/**
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* A priority queue composed of one specific heap policy.
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*
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* @tparam _Tv Value type.
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* @tparam Cmp_Fn Comparison functor.
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* @tparam Tag Instantiating data structure type,
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* see container_tag.
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* @tparam _Alloc Allocator type.
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*
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* Base is dispatched at compile time via Tag, from the following
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* choices: binary_heap_tag, binomial_heap_tag, pairing_heap_tag,
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* rc_binomial_heap_tag, thin_heap_tag
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*
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* Base choices are: detail::binary_heap, detail::binomial_heap,
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* detail::pairing_heap, detail::rc_binomial_heap,
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* detail::thin_heap.
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*/
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template<typename _Tv,
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typename Cmp_Fn = std::less<_Tv>,
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typename Tag = pairing_heap_tag,
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typename _Alloc = std::allocator<char> >
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class priority_queue
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: public detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc, Tag>::type
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{
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public:
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typedef _Tv value_type;
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typedef Cmp_Fn cmp_fn;
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typedef Tag container_category;
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typedef _Alloc allocator_type;
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typedef typename allocator_type::size_type size_type;
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typedef typename allocator_type::difference_type difference_type;
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private:
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typedef typename detail::container_base_dispatch<_Tv, Cmp_Fn, _Alloc,
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Tag>::type
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base_type;
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typedef typename _Alloc::template rebind<_Tv> __rebind_v;
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typedef typename __rebind_v::other __rebind_va;
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public:
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typedef typename __rebind_va::reference reference;
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typedef typename __rebind_va::const_reference const_reference;
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typedef typename __rebind_va::pointer pointer;
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typedef typename __rebind_va::const_pointer const_pointer;
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typedef typename base_type::point_iterator point_iterator;
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typedef typename base_type::point_const_iterator point_const_iterator;
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typedef typename base_type::iterator iterator;
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typedef typename base_type::const_iterator const_iterator;
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priority_queue() { }
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/// Constructor taking some policy objects. r_cmp_fn will be
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/// copied by the Cmp_Fn object of the container object.
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priority_queue(const cmp_fn& r_cmp_fn) : base_type(r_cmp_fn) { }
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/// Constructor taking __iterators to a range of value_types. The
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/// value_types between first_it and last_it will be inserted into
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/// the container object.
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template<typename It>
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priority_queue(It first_it, It last_it)
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{ base_type::copy_from_range(first_it, last_it); }
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/// Constructor taking __iterators to a range of value_types and
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/// some policy objects The value_types between first_it and
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/// last_it will be inserted into the container object. r_cmp_fn
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/// will be copied by the cmp_fn object of the container object.
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template<typename It>
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priority_queue(It first_it, It last_it, const cmp_fn& r_cmp_fn)
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: base_type(r_cmp_fn)
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{ base_type::copy_from_range(first_it, last_it); }
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priority_queue(const priority_queue& other)
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: base_type((const base_type& )other) { }
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virtual
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~priority_queue() { }
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priority_queue&
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operator=(const priority_queue& other)
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{
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if (this != &other)
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{
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priority_queue tmp(other);
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swap(tmp);
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}
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return *this;
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}
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void
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swap(priority_queue& other)
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{ base_type::swap(other); }
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};
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} // namespace __gnu_pbds
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//@} heap-based
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#endif
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