5dfb5e5be8
2018-03-20 François Dumont <fdumont@gcc.gnu.org> PR libstdc++/84998 * include/bits/stl_bvector.h: Fix std::hash friend declaration. * include/std/bitset: Likewise. * include/bits/stl_map.h (std::map<>): Fix _Rb_tree_merge_helper friend declaration. * include/bits/stl_multimap.h (std::multimap<>): Likewise. * include/bits/stl_multiset.h (std::multiset<>): Likewise. * include/bits/stl_set.h (std::set<>): Likewise. * include/bits/unordered_map.h (std::unordered_map<>): Fix _Hash_merge_helper friend declaration. (std::unordered_multimap<>): Likewise. * include/bits/unordered_set.h (std::unordered_set<>): Likewise. (std::unordered_multiset<>): Likewise. From-SVN: r258693
1027 lines
35 KiB
C++
1027 lines
35 KiB
C++
// Multiset implementation -*- C++ -*-
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// Copyright (C) 2001-2018 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
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU 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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/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Hewlett-Packard Company makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*
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* Copyright (c) 1996
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*/
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/** @file bits/stl_multiset.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{set}
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*/
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#ifndef _STL_MULTISET_H
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#define _STL_MULTISET_H 1
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#include <bits/concept_check.h>
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#if __cplusplus >= 201103L
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#include <initializer_list>
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#endif
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
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template<typename _Key, typename _Compare, typename _Alloc>
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class set;
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/**
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* @brief A standard container made up of elements, which can be retrieved
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* in logarithmic time.
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*
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* @ingroup associative_containers
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*
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*
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* @tparam _Key Type of key objects.
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* @tparam _Compare Comparison function object type, defaults to less<_Key>.
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* @tparam _Alloc Allocator type, defaults to allocator<_Key>.
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*
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* Meets the requirements of a <a href="tables.html#65">container</a>, a
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* <a href="tables.html#66">reversible container</a>, and an
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* <a href="tables.html#69">associative container</a> (using equivalent
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* keys). For a @c multiset<Key> the key_type and value_type are Key.
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*
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* Multisets support bidirectional iterators.
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*
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* The private tree data is declared exactly the same way for set and
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* multiset; the distinction is made entirely in how the tree functions are
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* called (*_unique versus *_equal, same as the standard).
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*/
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template <typename _Key, typename _Compare = std::less<_Key>,
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typename _Alloc = std::allocator<_Key> >
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class multiset
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{
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#ifdef _GLIBCXX_CONCEPT_CHECKS
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// concept requirements
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typedef typename _Alloc::value_type _Alloc_value_type;
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# if __cplusplus < 201103L
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__glibcxx_class_requires(_Key, _SGIAssignableConcept)
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# endif
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__glibcxx_class_requires4(_Compare, bool, _Key, _Key,
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_BinaryFunctionConcept)
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__glibcxx_class_requires2(_Key, _Alloc_value_type, _SameTypeConcept)
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#endif
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#if __cplusplus >= 201103L
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static_assert(is_same<typename remove_cv<_Key>::type, _Key>::value,
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"std::multiset must have a non-const, non-volatile value_type");
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# ifdef __STRICT_ANSI__
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static_assert(is_same<typename _Alloc::value_type, _Key>::value,
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"std::multiset must have the same value_type as its allocator");
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# endif
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#endif
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public:
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// typedefs:
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typedef _Key key_type;
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typedef _Key value_type;
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typedef _Compare key_compare;
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typedef _Compare value_compare;
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typedef _Alloc allocator_type;
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private:
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/// This turns a red-black tree into a [multi]set.
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typedef typename __gnu_cxx::__alloc_traits<_Alloc>::template
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rebind<_Key>::other _Key_alloc_type;
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typedef _Rb_tree<key_type, value_type, _Identity<value_type>,
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key_compare, _Key_alloc_type> _Rep_type;
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/// The actual tree structure.
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_Rep_type _M_t;
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typedef __gnu_cxx::__alloc_traits<_Key_alloc_type> _Alloc_traits;
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public:
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typedef typename _Alloc_traits::pointer pointer;
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typedef typename _Alloc_traits::const_pointer const_pointer;
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typedef typename _Alloc_traits::reference reference;
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typedef typename _Alloc_traits::const_reference const_reference;
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// DR 103. set::iterator is required to be modifiable,
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// but this allows modification of keys.
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typedef typename _Rep_type::const_iterator iterator;
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typedef typename _Rep_type::const_iterator const_iterator;
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typedef typename _Rep_type::const_reverse_iterator reverse_iterator;
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typedef typename _Rep_type::const_reverse_iterator const_reverse_iterator;
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typedef typename _Rep_type::size_type size_type;
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typedef typename _Rep_type::difference_type difference_type;
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#if __cplusplus > 201402L
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using node_type = typename _Rep_type::node_type;
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#endif
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// allocation/deallocation
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/**
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* @brief Default constructor creates no elements.
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*/
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#if __cplusplus < 201103L
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multiset() : _M_t() { }
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#else
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multiset() = default;
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#endif
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/**
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* @brief Creates a %multiset with no elements.
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* @param __comp Comparator to use.
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* @param __a An allocator object.
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*/
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explicit
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multiset(const _Compare& __comp,
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Key_alloc_type(__a)) { }
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/**
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* @brief Builds a %multiset from a range.
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* @param __first An input iterator.
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* @param __last An input iterator.
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*
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* Create a %multiset consisting of copies of the elements from
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* [first,last). This is linear in N if the range is already sorted,
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* and NlogN otherwise (where N is distance(__first,__last)).
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*/
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template<typename _InputIterator>
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multiset(_InputIterator __first, _InputIterator __last)
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: _M_t()
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{ _M_t._M_insert_equal(__first, __last); }
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/**
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* @brief Builds a %multiset from a range.
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* @param __first An input iterator.
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* @param __last An input iterator.
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* @param __comp A comparison functor.
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* @param __a An allocator object.
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*
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* Create a %multiset consisting of copies of the elements from
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* [__first,__last). This is linear in N if the range is already sorted,
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* and NlogN otherwise (where N is distance(__first,__last)).
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*/
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template<typename _InputIterator>
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multiset(_InputIterator __first, _InputIterator __last,
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const _Compare& __comp,
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Key_alloc_type(__a))
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{ _M_t._M_insert_equal(__first, __last); }
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/**
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* @brief %Multiset copy constructor.
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*
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* Whether the allocator is copied depends on the allocator traits.
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*/
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#if __cplusplus < 201103L
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multiset(const multiset& __x)
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: _M_t(__x._M_t) { }
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#else
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multiset(const multiset&) = default;
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/**
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* @brief %Multiset move constructor.
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*
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* The newly-created %multiset contains the exact contents of the
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* moved instance. The moved instance is a valid, but unspecified
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* %multiset.
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*/
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multiset(multiset&&) = default;
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/**
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* @brief Builds a %multiset from an initializer_list.
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* @param __l An initializer_list.
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* @param __comp A comparison functor.
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* @param __a An allocator object.
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*
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* Create a %multiset consisting of copies of the elements from
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* the list. This is linear in N if the list is already sorted,
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* and NlogN otherwise (where N is @a __l.size()).
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*/
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multiset(initializer_list<value_type> __l,
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const _Compare& __comp = _Compare(),
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const allocator_type& __a = allocator_type())
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: _M_t(__comp, _Key_alloc_type(__a))
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{ _M_t._M_insert_equal(__l.begin(), __l.end()); }
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/// Allocator-extended default constructor.
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explicit
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multiset(const allocator_type& __a)
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: _M_t(_Compare(), _Key_alloc_type(__a)) { }
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/// Allocator-extended copy constructor.
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multiset(const multiset& __m, const allocator_type& __a)
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: _M_t(__m._M_t, _Key_alloc_type(__a)) { }
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/// Allocator-extended move constructor.
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multiset(multiset&& __m, const allocator_type& __a)
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noexcept(is_nothrow_copy_constructible<_Compare>::value
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&& _Alloc_traits::_S_always_equal())
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: _M_t(std::move(__m._M_t), _Key_alloc_type(__a)) { }
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/// Allocator-extended initialier-list constructor.
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multiset(initializer_list<value_type> __l, const allocator_type& __a)
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: _M_t(_Compare(), _Key_alloc_type(__a))
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{ _M_t._M_insert_equal(__l.begin(), __l.end()); }
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/// Allocator-extended range constructor.
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template<typename _InputIterator>
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multiset(_InputIterator __first, _InputIterator __last,
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const allocator_type& __a)
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: _M_t(_Compare(), _Key_alloc_type(__a))
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{ _M_t._M_insert_equal(__first, __last); }
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/**
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* The dtor only erases the elements, and note that if the elements
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* themselves are pointers, the pointed-to memory is not touched in any
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* way. Managing the pointer is the user's responsibility.
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*/
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~multiset() = default;
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#endif
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/**
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* @brief %Multiset assignment operator.
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*
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* Whether the allocator is copied depends on the allocator traits.
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*/
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#if __cplusplus < 201103L
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multiset&
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operator=(const multiset& __x)
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{
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_M_t = __x._M_t;
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return *this;
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}
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#else
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multiset&
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operator=(const multiset&) = default;
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/// Move assignment operator.
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multiset&
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operator=(multiset&&) = default;
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/**
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* @brief %Multiset list assignment operator.
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* @param __l An initializer_list.
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*
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* This function fills a %multiset with copies of the elements in the
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* initializer list @a __l.
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*
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* Note that the assignment completely changes the %multiset and
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* that the resulting %multiset's size is the same as the number
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* of elements assigned.
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*/
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multiset&
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operator=(initializer_list<value_type> __l)
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{
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_M_t._M_assign_equal(__l.begin(), __l.end());
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return *this;
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}
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#endif
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// accessors:
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/// Returns the comparison object.
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key_compare
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key_comp() const
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{ return _M_t.key_comp(); }
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/// Returns the comparison object.
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value_compare
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value_comp() const
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{ return _M_t.key_comp(); }
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/// Returns the memory allocation object.
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allocator_type
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get_allocator() const _GLIBCXX_NOEXCEPT
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{ return allocator_type(_M_t.get_allocator()); }
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/**
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* Returns a read-only (constant) iterator that points to the first
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* element in the %multiset. Iteration is done in ascending order
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* according to the keys.
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*/
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iterator
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begin() const _GLIBCXX_NOEXCEPT
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{ return _M_t.begin(); }
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/**
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* Returns a read-only (constant) iterator that points one past the last
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* element in the %multiset. Iteration is done in ascending order
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* according to the keys.
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*/
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iterator
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end() const _GLIBCXX_NOEXCEPT
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{ return _M_t.end(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last element in the %multiset. Iteration is done in descending order
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* according to the keys.
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*/
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reverse_iterator
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rbegin() const _GLIBCXX_NOEXCEPT
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{ return _M_t.rbegin(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last element in the %multiset. Iteration is done in descending order
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* according to the keys.
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*/
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reverse_iterator
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rend() const _GLIBCXX_NOEXCEPT
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{ return _M_t.rend(); }
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#if __cplusplus >= 201103L
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/**
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* Returns a read-only (constant) iterator that points to the first
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* element in the %multiset. Iteration is done in ascending order
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* according to the keys.
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*/
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iterator
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cbegin() const noexcept
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{ return _M_t.begin(); }
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/**
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* Returns a read-only (constant) iterator that points one past the last
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* element in the %multiset. Iteration is done in ascending order
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* according to the keys.
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*/
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iterator
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cend() const noexcept
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{ return _M_t.end(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last element in the %multiset. Iteration is done in descending order
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* according to the keys.
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*/
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reverse_iterator
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crbegin() const noexcept
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{ return _M_t.rbegin(); }
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/**
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* Returns a read-only (constant) reverse iterator that points to the
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* last element in the %multiset. Iteration is done in descending order
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* according to the keys.
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*/
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reverse_iterator
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crend() const noexcept
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{ return _M_t.rend(); }
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#endif
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/// Returns true if the %set is empty.
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bool
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empty() const _GLIBCXX_NOEXCEPT
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{ return _M_t.empty(); }
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/// Returns the size of the %set.
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size_type
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size() const _GLIBCXX_NOEXCEPT
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{ return _M_t.size(); }
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/// Returns the maximum size of the %set.
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size_type
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max_size() const _GLIBCXX_NOEXCEPT
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{ return _M_t.max_size(); }
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/**
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* @brief Swaps data with another %multiset.
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* @param __x A %multiset of the same element and allocator types.
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*
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* This exchanges the elements between two multisets in constant time.
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* (It is only swapping a pointer, an integer, and an instance of the @c
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* Compare type (which itself is often stateless and empty), so it should
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* be quite fast.)
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* Note that the global std::swap() function is specialized such that
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* std::swap(s1,s2) will feed to this function.
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*
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* Whether the allocators are swapped depends on the allocator traits.
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*/
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void
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swap(multiset& __x)
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_GLIBCXX_NOEXCEPT_IF(__is_nothrow_swappable<_Compare>::value)
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{ _M_t.swap(__x._M_t); }
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// insert/erase
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#if __cplusplus >= 201103L
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/**
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* @brief Builds and inserts an element into the %multiset.
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* @param __args Arguments used to generate the element instance to be
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* inserted.
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* @return An iterator that points to the inserted element.
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*
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* This function inserts an element into the %multiset. Contrary
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* to a std::set the %multiset does not rely on unique keys and thus
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* multiple copies of the same element can be inserted.
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*
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* Insertion requires logarithmic time.
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*/
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template<typename... _Args>
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iterator
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emplace(_Args&&... __args)
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{ return _M_t._M_emplace_equal(std::forward<_Args>(__args)...); }
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/**
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* @brief Builds and inserts an element into the %multiset.
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* @param __pos An iterator that serves as a hint as to where the
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* element should be inserted.
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* @param __args Arguments used to generate the element instance to be
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* inserted.
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* @return An iterator that points to the inserted element.
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*
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* This function inserts an element into the %multiset. Contrary
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* to a std::set the %multiset does not rely on unique keys and thus
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* multiple copies of the same element can be inserted.
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*
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* Note that the first parameter is only a hint and can potentially
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* improve the performance of the insertion process. A bad hint would
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* cause no gains in efficiency.
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*
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* See https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
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* for more on @a hinting.
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*
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* Insertion requires logarithmic time (if the hint is not taken).
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*/
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template<typename... _Args>
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iterator
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emplace_hint(const_iterator __pos, _Args&&... __args)
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{
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return _M_t._M_emplace_hint_equal(__pos,
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std::forward<_Args>(__args)...);
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}
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#endif
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/**
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* @brief Inserts an element into the %multiset.
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* @param __x Element to be inserted.
|
|
* @return An iterator that points to the inserted element.
|
|
*
|
|
* This function inserts an element into the %multiset. Contrary
|
|
* to a std::set the %multiset does not rely on unique keys and thus
|
|
* multiple copies of the same element can be inserted.
|
|
*
|
|
* Insertion requires logarithmic time.
|
|
*/
|
|
iterator
|
|
insert(const value_type& __x)
|
|
{ return _M_t._M_insert_equal(__x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
iterator
|
|
insert(value_type&& __x)
|
|
{ return _M_t._M_insert_equal(std::move(__x)); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Inserts an element into the %multiset.
|
|
* @param __position An iterator that serves as a hint as to where the
|
|
* element should be inserted.
|
|
* @param __x Element to be inserted.
|
|
* @return An iterator that points to the inserted element.
|
|
*
|
|
* This function inserts an element into the %multiset. Contrary
|
|
* to a std::set the %multiset does not rely on unique keys and thus
|
|
* multiple copies of the same element can be inserted.
|
|
*
|
|
* Note that the first parameter is only a hint and can potentially
|
|
* improve the performance of the insertion process. A bad hint would
|
|
* cause no gains in efficiency.
|
|
*
|
|
* See https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints
|
|
* for more on @a hinting.
|
|
*
|
|
* Insertion requires logarithmic time (if the hint is not taken).
|
|
*/
|
|
iterator
|
|
insert(const_iterator __position, const value_type& __x)
|
|
{ return _M_t._M_insert_equal_(__position, __x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
iterator
|
|
insert(const_iterator __position, value_type&& __x)
|
|
{ return _M_t._M_insert_equal_(__position, std::move(__x)); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief A template function that tries to insert a range of elements.
|
|
* @param __first Iterator pointing to the start of the range to be
|
|
* inserted.
|
|
* @param __last Iterator pointing to the end of the range.
|
|
*
|
|
* Complexity similar to that of the range constructor.
|
|
*/
|
|
template<typename _InputIterator>
|
|
void
|
|
insert(_InputIterator __first, _InputIterator __last)
|
|
{ _M_t._M_insert_equal(__first, __last); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
/**
|
|
* @brief Attempts to insert a list of elements into the %multiset.
|
|
* @param __l A std::initializer_list<value_type> of elements
|
|
* to be inserted.
|
|
*
|
|
* Complexity similar to that of the range constructor.
|
|
*/
|
|
void
|
|
insert(initializer_list<value_type> __l)
|
|
{ this->insert(__l.begin(), __l.end()); }
|
|
#endif
|
|
|
|
#if __cplusplus > 201402L
|
|
/// Extract a node.
|
|
node_type
|
|
extract(const_iterator __pos)
|
|
{
|
|
__glibcxx_assert(__pos != end());
|
|
return _M_t.extract(__pos);
|
|
}
|
|
|
|
/// Extract a node.
|
|
node_type
|
|
extract(const key_type& __x)
|
|
{ return _M_t.extract(__x); }
|
|
|
|
/// Re-insert an extracted node.
|
|
iterator
|
|
insert(node_type&& __nh)
|
|
{ return _M_t._M_reinsert_node_equal(std::move(__nh)); }
|
|
|
|
/// Re-insert an extracted node.
|
|
iterator
|
|
insert(const_iterator __hint, node_type&& __nh)
|
|
{ return _M_t._M_reinsert_node_hint_equal(__hint, std::move(__nh)); }
|
|
|
|
template<typename, typename>
|
|
friend class std::_Rb_tree_merge_helper;
|
|
|
|
template<typename _Compare1>
|
|
void
|
|
merge(multiset<_Key, _Compare1, _Alloc>& __source)
|
|
{
|
|
using _Merge_helper = _Rb_tree_merge_helper<multiset, _Compare1>;
|
|
_M_t._M_merge_equal(_Merge_helper::_S_get_tree(__source));
|
|
}
|
|
|
|
template<typename _Compare1>
|
|
void
|
|
merge(multiset<_Key, _Compare1, _Alloc>&& __source)
|
|
{ merge(__source); }
|
|
|
|
template<typename _Compare1>
|
|
void
|
|
merge(set<_Key, _Compare1, _Alloc>& __source)
|
|
{
|
|
using _Merge_helper = _Rb_tree_merge_helper<multiset, _Compare1>;
|
|
_M_t._M_merge_equal(_Merge_helper::_S_get_tree(__source));
|
|
}
|
|
|
|
template<typename _Compare1>
|
|
void
|
|
merge(set<_Key, _Compare1, _Alloc>&& __source)
|
|
{ merge(__source); }
|
|
#endif // C++17
|
|
|
|
#if __cplusplus >= 201103L
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 130. Associative erase should return an iterator.
|
|
/**
|
|
* @brief Erases an element from a %multiset.
|
|
* @param __position An iterator pointing to the element to be erased.
|
|
* @return An iterator pointing to the element immediately following
|
|
* @a position prior to the element being erased. If no such
|
|
* element exists, end() is returned.
|
|
*
|
|
* This function erases an element, pointed to by the given iterator,
|
|
* from a %multiset. Note that this function only erases the element,
|
|
* and that if the element is itself a pointer, the pointed-to memory is
|
|
* not touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
_GLIBCXX_ABI_TAG_CXX11
|
|
iterator
|
|
erase(const_iterator __position)
|
|
{ return _M_t.erase(__position); }
|
|
#else
|
|
/**
|
|
* @brief Erases an element from a %multiset.
|
|
* @param __position An iterator pointing to the element to be erased.
|
|
*
|
|
* This function erases an element, pointed to by the given iterator,
|
|
* from a %multiset. Note that this function only erases the element,
|
|
* and that if the element is itself a pointer, the pointed-to memory is
|
|
* not touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
void
|
|
erase(iterator __position)
|
|
{ _M_t.erase(__position); }
|
|
#endif
|
|
|
|
/**
|
|
* @brief Erases elements according to the provided key.
|
|
* @param __x Key of element to be erased.
|
|
* @return The number of elements erased.
|
|
*
|
|
* This function erases all elements located by the given key from a
|
|
* %multiset.
|
|
* Note that this function only erases the element, and that if
|
|
* the element is itself a pointer, the pointed-to memory is not touched
|
|
* in any way. Managing the pointer is the user's responsibility.
|
|
*/
|
|
size_type
|
|
erase(const key_type& __x)
|
|
{ return _M_t.erase(__x); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// DR 130. Associative erase should return an iterator.
|
|
/**
|
|
* @brief Erases a [first,last) range of elements from a %multiset.
|
|
* @param __first Iterator pointing to the start of the range to be
|
|
* erased.
|
|
* @param __last Iterator pointing to the end of the range to
|
|
* be erased.
|
|
* @return The iterator @a last.
|
|
*
|
|
* This function erases a sequence of elements from a %multiset.
|
|
* Note that this function only erases the elements, and that if
|
|
* the elements themselves are pointers, the pointed-to memory is not
|
|
* touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
_GLIBCXX_ABI_TAG_CXX11
|
|
iterator
|
|
erase(const_iterator __first, const_iterator __last)
|
|
{ return _M_t.erase(__first, __last); }
|
|
#else
|
|
/**
|
|
* @brief Erases a [first,last) range of elements from a %multiset.
|
|
* @param first Iterator pointing to the start of the range to be
|
|
* erased.
|
|
* @param last Iterator pointing to the end of the range to be erased.
|
|
*
|
|
* This function erases a sequence of elements from a %multiset.
|
|
* Note that this function only erases the elements, and that if
|
|
* the elements themselves are pointers, the pointed-to memory is not
|
|
* touched in any way. Managing the pointer is the user's
|
|
* responsibility.
|
|
*/
|
|
void
|
|
erase(iterator __first, iterator __last)
|
|
{ _M_t.erase(__first, __last); }
|
|
#endif
|
|
|
|
/**
|
|
* Erases all elements in a %multiset. Note that this function only
|
|
* erases the elements, and that if the elements themselves are pointers,
|
|
* the pointed-to memory is not touched in any way. Managing the pointer
|
|
* is the user's responsibility.
|
|
*/
|
|
void
|
|
clear() _GLIBCXX_NOEXCEPT
|
|
{ _M_t.clear(); }
|
|
|
|
// multiset operations:
|
|
|
|
//@{
|
|
/**
|
|
* @brief Finds the number of elements with given key.
|
|
* @param __x Key of elements to be located.
|
|
* @return Number of elements with specified key.
|
|
*/
|
|
size_type
|
|
count(const key_type& __x) const
|
|
{ return _M_t.count(__x); }
|
|
|
|
#if __cplusplus > 201103L
|
|
template<typename _Kt>
|
|
auto
|
|
count(const _Kt& __x) const -> decltype(_M_t._M_count_tr(__x))
|
|
{ return _M_t._M_count_tr(__x); }
|
|
#endif
|
|
//@}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 214. set::find() missing const overload
|
|
//@{
|
|
/**
|
|
* @brief Tries to locate an element in a %set.
|
|
* @param __x Element to be located.
|
|
* @return Iterator pointing to sought-after element, or end() if not
|
|
* found.
|
|
*
|
|
* This function takes a key and tries to locate the element with which
|
|
* the key matches. If successful the function returns an iterator
|
|
* pointing to the sought after element. If unsuccessful it returns the
|
|
* past-the-end ( @c end() ) iterator.
|
|
*/
|
|
iterator
|
|
find(const key_type& __x)
|
|
{ return _M_t.find(__x); }
|
|
|
|
const_iterator
|
|
find(const key_type& __x) const
|
|
{ return _M_t.find(__x); }
|
|
|
|
#if __cplusplus > 201103L
|
|
template<typename _Kt>
|
|
auto
|
|
find(const _Kt& __x)
|
|
-> decltype(iterator{_M_t._M_find_tr(__x)})
|
|
{ return iterator{_M_t._M_find_tr(__x)}; }
|
|
|
|
template<typename _Kt>
|
|
auto
|
|
find(const _Kt& __x) const
|
|
-> decltype(const_iterator{_M_t._M_find_tr(__x)})
|
|
{ return const_iterator{_M_t._M_find_tr(__x)}; }
|
|
#endif
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* @brief Finds the beginning of a subsequence matching given key.
|
|
* @param __x Key to be located.
|
|
* @return Iterator pointing to first element equal to or greater
|
|
* than key, or end().
|
|
*
|
|
* This function returns the first element of a subsequence of elements
|
|
* that matches the given key. If unsuccessful it returns an iterator
|
|
* pointing to the first element that has a greater value than given key
|
|
* or end() if no such element exists.
|
|
*/
|
|
iterator
|
|
lower_bound(const key_type& __x)
|
|
{ return _M_t.lower_bound(__x); }
|
|
|
|
const_iterator
|
|
lower_bound(const key_type& __x) const
|
|
{ return _M_t.lower_bound(__x); }
|
|
|
|
#if __cplusplus > 201103L
|
|
template<typename _Kt>
|
|
auto
|
|
lower_bound(const _Kt& __x)
|
|
-> decltype(iterator(_M_t._M_lower_bound_tr(__x)))
|
|
{ return iterator(_M_t._M_lower_bound_tr(__x)); }
|
|
|
|
template<typename _Kt>
|
|
auto
|
|
lower_bound(const _Kt& __x) const
|
|
-> decltype(iterator(_M_t._M_lower_bound_tr(__x)))
|
|
{ return iterator(_M_t._M_lower_bound_tr(__x)); }
|
|
#endif
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* @brief Finds the end of a subsequence matching given key.
|
|
* @param __x Key to be located.
|
|
* @return Iterator pointing to the first element
|
|
* greater than key, or end().
|
|
*/
|
|
iterator
|
|
upper_bound(const key_type& __x)
|
|
{ return _M_t.upper_bound(__x); }
|
|
|
|
const_iterator
|
|
upper_bound(const key_type& __x) const
|
|
{ return _M_t.upper_bound(__x); }
|
|
|
|
#if __cplusplus > 201103L
|
|
template<typename _Kt>
|
|
auto
|
|
upper_bound(const _Kt& __x)
|
|
-> decltype(iterator(_M_t._M_upper_bound_tr(__x)))
|
|
{ return iterator(_M_t._M_upper_bound_tr(__x)); }
|
|
|
|
template<typename _Kt>
|
|
auto
|
|
upper_bound(const _Kt& __x) const
|
|
-> decltype(iterator(_M_t._M_upper_bound_tr(__x)))
|
|
{ return iterator(_M_t._M_upper_bound_tr(__x)); }
|
|
#endif
|
|
//@}
|
|
|
|
//@{
|
|
/**
|
|
* @brief Finds a subsequence matching given key.
|
|
* @param __x Key to be located.
|
|
* @return Pair of iterators that possibly points to the subsequence
|
|
* matching given key.
|
|
*
|
|
* This function is equivalent to
|
|
* @code
|
|
* std::make_pair(c.lower_bound(val),
|
|
* c.upper_bound(val))
|
|
* @endcode
|
|
* (but is faster than making the calls separately).
|
|
*
|
|
* This function probably only makes sense for multisets.
|
|
*/
|
|
std::pair<iterator, iterator>
|
|
equal_range(const key_type& __x)
|
|
{ return _M_t.equal_range(__x); }
|
|
|
|
std::pair<const_iterator, const_iterator>
|
|
equal_range(const key_type& __x) const
|
|
{ return _M_t.equal_range(__x); }
|
|
|
|
#if __cplusplus > 201103L
|
|
template<typename _Kt>
|
|
auto
|
|
equal_range(const _Kt& __x)
|
|
-> decltype(pair<iterator, iterator>(_M_t._M_equal_range_tr(__x)))
|
|
{ return pair<iterator, iterator>(_M_t._M_equal_range_tr(__x)); }
|
|
|
|
template<typename _Kt>
|
|
auto
|
|
equal_range(const _Kt& __x) const
|
|
-> decltype(pair<iterator, iterator>(_M_t._M_equal_range_tr(__x)))
|
|
{ return pair<iterator, iterator>(_M_t._M_equal_range_tr(__x)); }
|
|
#endif
|
|
//@}
|
|
|
|
template<typename _K1, typename _C1, typename _A1>
|
|
friend bool
|
|
operator==(const multiset<_K1, _C1, _A1>&,
|
|
const multiset<_K1, _C1, _A1>&);
|
|
|
|
template<typename _K1, typename _C1, typename _A1>
|
|
friend bool
|
|
operator< (const multiset<_K1, _C1, _A1>&,
|
|
const multiset<_K1, _C1, _A1>&);
|
|
};
|
|
|
|
#if __cpp_deduction_guides >= 201606
|
|
|
|
template<typename _InputIterator,
|
|
typename _Compare =
|
|
less<typename iterator_traits<_InputIterator>::value_type>,
|
|
typename _Allocator =
|
|
allocator<typename iterator_traits<_InputIterator>::value_type>,
|
|
typename = _RequireInputIter<_InputIterator>,
|
|
typename = _RequireAllocator<_Allocator>>
|
|
multiset(_InputIterator, _InputIterator,
|
|
_Compare = _Compare(), _Allocator = _Allocator())
|
|
-> multiset<typename iterator_traits<_InputIterator>::value_type,
|
|
_Compare, _Allocator>;
|
|
|
|
template<typename _Key,
|
|
typename _Compare = less<_Key>,
|
|
typename _Allocator = allocator<_Key>,
|
|
typename = _RequireAllocator<_Allocator>>
|
|
multiset(initializer_list<_Key>,
|
|
_Compare = _Compare(), _Allocator = _Allocator())
|
|
-> multiset<_Key, _Compare, _Allocator>;
|
|
|
|
template<typename _InputIterator, typename _Allocator,
|
|
typename = _RequireInputIter<_InputIterator>,
|
|
typename = _RequireAllocator<_Allocator>>
|
|
multiset(_InputIterator, _InputIterator, _Allocator)
|
|
-> multiset<typename iterator_traits<_InputIterator>::value_type,
|
|
less<typename iterator_traits<_InputIterator>::value_type>,
|
|
_Allocator>;
|
|
|
|
template<typename _Key, typename _Allocator,
|
|
typename = _RequireAllocator<_Allocator>>
|
|
multiset(initializer_list<_Key>, _Allocator)
|
|
-> multiset<_Key, less<_Key>, _Allocator>;
|
|
|
|
#endif
|
|
|
|
/**
|
|
* @brief Multiset equality comparison.
|
|
* @param __x A %multiset.
|
|
* @param __y A %multiset of the same type as @a __x.
|
|
* @return True iff the size and elements of the multisets are equal.
|
|
*
|
|
* This is an equivalence relation. It is linear in the size of the
|
|
* multisets.
|
|
* Multisets are considered equivalent if their sizes are equal, and if
|
|
* corresponding elements compare equal.
|
|
*/
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator==(const multiset<_Key, _Compare, _Alloc>& __x,
|
|
const multiset<_Key, _Compare, _Alloc>& __y)
|
|
{ return __x._M_t == __y._M_t; }
|
|
|
|
/**
|
|
* @brief Multiset ordering relation.
|
|
* @param __x A %multiset.
|
|
* @param __y A %multiset of the same type as @a __x.
|
|
* @return True iff @a __x is lexicographically less than @a __y.
|
|
*
|
|
* This is a total ordering relation. It is linear in the size of the
|
|
* sets. The elements must be comparable with @c <.
|
|
*
|
|
* See std::lexicographical_compare() for how the determination is made.
|
|
*/
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator<(const multiset<_Key, _Compare, _Alloc>& __x,
|
|
const multiset<_Key, _Compare, _Alloc>& __y)
|
|
{ return __x._M_t < __y._M_t; }
|
|
|
|
/// Returns !(x == y).
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator!=(const multiset<_Key, _Compare, _Alloc>& __x,
|
|
const multiset<_Key, _Compare, _Alloc>& __y)
|
|
{ return !(__x == __y); }
|
|
|
|
/// Returns y < x.
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator>(const multiset<_Key,_Compare,_Alloc>& __x,
|
|
const multiset<_Key,_Compare,_Alloc>& __y)
|
|
{ return __y < __x; }
|
|
|
|
/// Returns !(y < x)
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator<=(const multiset<_Key, _Compare, _Alloc>& __x,
|
|
const multiset<_Key, _Compare, _Alloc>& __y)
|
|
{ return !(__y < __x); }
|
|
|
|
/// Returns !(x < y)
|
|
template<typename _Key, typename _Compare, typename _Alloc>
|
|
inline bool
|
|
operator>=(const multiset<_Key, _Compare, _Alloc>& __x,
|
|
const multiset<_Key, _Compare, _Alloc>& __y)
|
|
{ return !(__x < __y); }
|
|
|
|
/// See std::multiset::swap().
|
|
template<typename _Key, typename _Compare, typename _Alloc>
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inline void
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swap(multiset<_Key, _Compare, _Alloc>& __x,
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multiset<_Key, _Compare, _Alloc>& __y)
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_GLIBCXX_NOEXCEPT_IF(noexcept(__x.swap(__y)))
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{ __x.swap(__y); }
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_GLIBCXX_END_NAMESPACE_CONTAINER
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#if __cplusplus > 201402L
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// Allow std::multiset access to internals of compatible sets.
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template<typename _Val, typename _Cmp1, typename _Alloc, typename _Cmp2>
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struct
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_Rb_tree_merge_helper<_GLIBCXX_STD_C::multiset<_Val, _Cmp1, _Alloc>,
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_Cmp2>
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{
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private:
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friend class _GLIBCXX_STD_C::multiset<_Val, _Cmp1, _Alloc>;
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static auto&
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_S_get_tree(_GLIBCXX_STD_C::set<_Val, _Cmp2, _Alloc>& __set)
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{ return __set._M_t; }
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static auto&
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_S_get_tree(_GLIBCXX_STD_C::multiset<_Val, _Cmp2, _Alloc>& __set)
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{ return __set._M_t; }
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};
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#endif // C++17
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_GLIBCXX_END_NAMESPACE_VERSION
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} // namespace std
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#endif /* _STL_MULTISET_H */
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