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Edit File : multimap.h \| Size : 19.25 KB
// Debugging multimap implementation -- C++ -- // Copyright (C) 2003-2018 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/>. /** @file debug/multimap.h * This file is a GNU debug extension to the Standard C++ Library. / #ifndef _GLIBCXX_DEBUG_MULTIMAP_H #define _GLIBCXX_DEBUG_MULTIMAP_H 1 #include <debug/safe_sequence.h> #include <debug/safe_container.h> #include <debug/safe_iterator.h> #include <utility> namespace std _GLIBCXX_VISIBILITY(default) { namespace __debug { /// Class std::multimap with safety/checking/debug instrumentation. template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>, typename _Allocator = std::allocator<std::pair<const _Key, _Tp> > > class multimap : public __gnu_debug::_Safe_container< multimap<_Key, _Tp, _Compare, _Allocator>, _Allocator, __gnu_debug::_Safe_node_sequence>, public _GLIBCXX_STD_C::multimap<_Key, _Tp, _Compare, _Allocator> { typedef _GLIBCXX_STD_C::multimap< _Key, _Tp, _Compare, _Allocator> _Base; typedef __gnu_debug::_Safe_container< multimap, _Allocator, __gnu_debug::_Safe_node_sequence> _Safe; typedef typename _Base::const_iterator _Base_const_iterator; typedef typename _Base::iterator _Base_iterator; typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal; public: // types: typedef _Key key_type; typedef _Tp mapped_type; typedef std::pair<const _Key, _Tp> value_type; typedef _Compare key_compare; typedef _Allocator allocator_type; typedef typename _Base::reference reference; typedef typename _Base::const_reference const_reference; typedef __gnu_debug::_Safe_iterator<_Base_iterator, multimap> iterator; typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, multimap> const_iterator; typedef typename _Base::size_type size_type; typedef typename _Base::difference_type difference_type; typedef typename _Base::pointer pointer; typedef typename _Base::const_pointer const_pointer; typedef std::reverse_iterator<iterator> reverse_iterator; typedef std::reverse_iterator<const_iterator> const_reverse_iterator; // 23.3.1.1 construct/copy/destroy: #if __cplusplus < 201103L multimap() : _Base() { } multimap(const multimap& __x) : _Base(__x) { } ~multimap() { } #else multimap() = default; multimap(const multimap&) = default; multimap(multimap&&) = default; multimap(initializer_list<value_type> __l, const _Compare& __c = _Compare(), const allocator_type& __a = allocator_type()) : _Base(__l, __c, __a) { } explicit multimap(const allocator_type& __a) : _Base(__a) { } multimap(const multimap& __m, const allocator_type& __a) : _Base(__m, __a) { } multimap(multimap&& __m, const allocator_type& __a) noexcept( noexcept(_Base(std::move(__m._M_base()), __a)) ) : _Safe(std::move(__m._M_safe()), __a), _Base(std::move(__m._M_base()), __a) { } multimap(initializer_list<value_type> __l, const allocator_type& __a) : _Base(__l, __a) { } template<typename _InputIterator> multimap(_InputIterator __first, _InputIterator __last, const allocator_type& __a) : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, __last)), __gnu_debug::__base(__last), __a) { } ~multimap() = default; #endif explicit multimap(const _Compare& __comp, const _Allocator& __a = _Allocator()) : _Base(__comp, __a) { } template<typename _InputIterator> multimap(_InputIterator __first, _InputIterator __last, const _Compare& __comp = _Compare(), const _Allocator& __a = _Allocator()) : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, __last)), __gnu_debug::__base(__last), __comp, __a) { } multimap(const _Base& __x) : _Base(__x) { } #if __cplusplus < 201103L multimap& operator=(const multimap& __x) { this->_M_safe() = __x; _M_base() = __x; return this; } #else multimap& operator=(const multimap&) = default; multimap& operator=(multimap&&) = default; multimap& operator=(initializer_list<value_type> __l) { _M_base() = __l; this->_M_invalidate_all(); return this; } #endif using _Base::get_allocator; // iterators: iterator begin() _GLIBCXX_NOEXCEPT { return iterator(_Base::begin(), this); } const_iterator begin() const _GLIBCXX_NOEXCEPT { return const_iterator(_Base::begin(), this); } iterator end() _GLIBCXX_NOEXCEPT { return iterator(_Base::end(), this); } const_iterator end() const _GLIBCXX_NOEXCEPT { return const_iterator(_Base::end(), this); } reverse_iterator rbegin() _GLIBCXX_NOEXCEPT { return reverse_iterator(end()); } const_reverse_iterator rbegin() const _GLIBCXX_NOEXCEPT { return const_reverse_iterator(end()); } reverse_iterator rend() _GLIBCXX_NOEXCEPT { return reverse_iterator(begin()); } const_reverse_iterator rend() const _GLIBCXX_NOEXCEPT { return const_reverse_iterator(begin()); } #if __cplusplus >= 201103L const_iterator cbegin() const noexcept { return const_iterator(_Base::begin(), this); } const_iterator cend() const noexcept { return const_iterator(_Base::end(), this); } const_reverse_iterator crbegin() const noexcept { return const_reverse_iterator(end()); } const_reverse_iterator crend() const noexcept { return const_reverse_iterator(begin()); } #endif // capacity: using _Base::empty; using _Base::size; using _Base::max_size; // modifiers: #if __cplusplus >= 201103L template<typename... _Args> iterator emplace(_Args&&... __args) { return iterator(_Base::emplace(std::forward<_Args>(__args)...), this); } template<typename... _Args> iterator emplace_hint(const_iterator __pos, _Args&&... __args) { __glibcxx_check_insert(__pos); return iterator(_Base::emplace_hint(__pos.base(), std::forward<_Args>(__args)...), this); } #endif iterator insert(const value_type& __x) { return iterator(_Base::insert(__x), this); } #if __cplusplus >= 201103L // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init iterator insert(value_type&& __x) { return { _Base::insert(std::move(__x)), this }; } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> iterator insert(_Pair&& __x) { return iterator(_Base::insert(std::forward<_Pair>(__x)), this); } #endif #if __cplusplus >= 201103L void insert(std::initializer_list<value_type> __list) { _Base::insert(__list); } #endif iterator #if __cplusplus >= 201103L insert(const_iterator __position, const value_type& __x) #else insert(iterator __position, const value_type& __x) #endif { __glibcxx_check_insert(__position); return iterator(_Base::insert(__position.base(), __x), this); } #if __cplusplus >= 201103L // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init iterator insert(const_iterator __position, value_type&& __x) { __glibcxx_check_insert(__position); return { _Base::insert(__position.base(), std::move(__x)), this }; } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> iterator insert(const_iterator __position, _Pair&& __x) { __glibcxx_check_insert(__position); return iterator(_Base::insert(__position.base(), std::forward<_Pair>(__x)), this); } #endif template<typename _InputIterator> void insert(_InputIterator __first, _InputIterator __last) { typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; __glibcxx_check_valid_range2(__first, __last, __dist); if (__dist.second >= __gnu_debug::__dp_sign) _Base::insert(__gnu_debug::__unsafe(__first), __gnu_debug::__unsafe(__last)); else _Base::insert(__first, __last); } #if __cplusplus > 201402L using node_type = typename _Base::node_type; node_type extract(const_iterator __position) { __glibcxx_check_erase(__position); this->_M_invalidate_if(_Equal(__position.base())); return _Base::extract(__position.base()); } node_type extract(const key_type& __key) { const auto __position = find(__key); if (__position != end()) return extract(__position); return {}; } iterator insert(node_type&& __nh) { return iterator(_Base::insert(std::move(__nh)), this); } iterator insert(const_iterator __hint, node_type&& __nh) { __glibcxx_check_insert(__hint); return iterator(_Base::insert(__hint.base(), std::move(__nh)), this); } using _Base::merge; #endif // C++17 #if __cplusplus >= 201103L iterator erase(const_iterator __position) { __glibcxx_check_erase(__position); this->_M_invalidate_if(_Equal(__position.base())); return iterator(_Base::erase(__position.base()), this); } iterator erase(iterator __position) { return erase(const_iterator(__position)); } #else void erase(iterator __position) { __glibcxx_check_erase(__position); this->_M_invalidate_if(_Equal(__position.base())); _Base::erase(__position.base()); } #endif size_type erase(const key_type& __x) { std::pair<_Base_iterator, _Base_iterator> __victims = _Base::equal_range(__x); size_type __count = 0; _Base_iterator __victim = __victims.first; while (__victim != __victims.second) { this->_M_invalidate_if(_Equal(__victim)); _Base::erase(__victim++); ++__count; } return __count; } #if __cplusplus >= 201103L iterator erase(const_iterator __first, const_iterator __last) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 151. can't currently clear() empty container __glibcxx_check_erase_range(__first, __last); for (_Base_const_iterator __victim = __first.base(); __victim != __last.base(); ++__victim) { _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(), _M_message(__gnu_debug::__msg_valid_range) ._M_iterator(__first, "first") ._M_iterator(__last, "last")); this->_M_invalidate_if(_Equal(__victim)); } return iterator(_Base::erase(__first.base(), __last.base()), this); } #else void erase(iterator __first, iterator __last) { // _GLIBCXX_RESOLVE_LIB_DEFECTS // 151. can't currently clear() empty container __glibcxx_check_erase_range(__first, __last); for (_Base_iterator __victim = __first.base(); __victim != __last.base(); ++__victim) { _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(), _M_message(__gnu_debug::__msg_valid_range) ._M_iterator(__first, "first") ._M_iterator(__last, "last")); this->_M_invalidate_if(_Equal(__victim)); } _Base::erase(__first.base(), __last.base()); } #endif void swap(multimap& __x) _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) ) { _Safe::_M_swap(__x); _Base::swap(__x); } void clear() _GLIBCXX_NOEXCEPT { this->_M_invalidate_all(); _Base::clear(); } // observers: using _Base::key_comp; using _Base::value_comp; // 23.3.1.3 multimap operations: iterator find(const key_type& __x) { return iterator(_Base::find(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> iterator find(const _Kt& __x) { return { _Base::find(__x), this }; } #endif const_iterator find(const key_type& __x) const { return const_iterator(_Base::find(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> const_iterator find(const _Kt& __x) const { return { _Base::find(__x), this }; } #endif using _Base::count; iterator lower_bound(const key_type& __x) { return iterator(_Base::lower_bound(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> iterator lower_bound(const _Kt& __x) { return { _Base::lower_bound(__x), this }; } #endif const_iterator lower_bound(const key_type& __x) const { return const_iterator(_Base::lower_bound(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> const_iterator lower_bound(const _Kt& __x) const { return { _Base::lower_bound(__x), this }; } #endif iterator upper_bound(const key_type& __x) { return iterator(_Base::upper_bound(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> iterator upper_bound(const _Kt& __x) { return { _Base::upper_bound(__x), this }; } #endif const_iterator upper_bound(const key_type& __x) const { return const_iterator(_Base::upper_bound(__x), this); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> const_iterator upper_bound(const _Kt& __x) const { return { _Base::upper_bound(__x), this }; } #endif std::pair<iterator,iterator> equal_range(const key_type& __x) { std::pair<_Base_iterator, _Base_iterator> __res = _Base::equal_range(__x); return std::make_pair(iterator(__res.first, this), iterator(__res.second, this)); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> std::pair<iterator, iterator> equal_range(const _Kt& __x) { auto __res = _Base::equal_range(__x); return { { __res.first, this }, { __res.second, this } }; } #endif std::pair<const_iterator,const_iterator> equal_range(const key_type& __x) const { std::pair<_Base_const_iterator, _Base_const_iterator> __res = _Base::equal_range(__x); return std::make_pair(const_iterator(__res.first, this), const_iterator(__res.second, this)); } #if __cplusplus > 201103L template<typename _Kt, typename _Req = typename __has_is_transparent<_Compare, _Kt>::type> std::pair<const_iterator, const_iterator> equal_range(const _Kt& __x) const { auto __res = _Base::equal_range(__x); return { { __res.first, this }, { __res.second, this } }; } #endif _Base& _M_base() _GLIBCXX_NOEXCEPT { return this; } const _Base& _M_base() const _GLIBCXX_NOEXCEPT { return *this; } }; #if __cpp_deduction_guides >= 201606 template<typename _InputIterator, typename _Compare = less<__iter_key_t<_InputIterator>>, typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> multimap(_InputIterator, _InputIterator, _Compare = _Compare(), _Allocator = _Allocator()) -> multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Compare, _Allocator>; template<typename _Key, typename _Tp, typename _Compare = less<_Key>, typename _Allocator = allocator<pair<const _Key, _Tp>>, typename = _RequireAllocator<_Allocator>> multimap(initializer_list<pair<_Key, _Tp>>, _Compare = _Compare(), _Allocator = _Allocator()) -> multimap<_Key, _Tp, _Compare, _Allocator>; template<typename _InputIterator, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> multimap(_InputIterator, _InputIterator, _Allocator) -> multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, less<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _Key, typename _Tp, typename _Allocator, typename = _RequireAllocator<_Allocator>> multimap(initializer_list<pair<_Key, _Tp>>, _Allocator) -> multimap<_Key, _Tp, less<_Key>, _Allocator>; #endif template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() == __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() != __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator<(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() < __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() <= __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() >= __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline bool operator>(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) { return __lhs._M_base() > __rhs._M_base(); } template<typename _Key, typename _Tp, typename _Compare, typename _Allocator> inline void swap(multimap<_Key, _Tp, _Compare, _Allocator>& __lhs, multimap<_Key, _Tp, _Compare, _Allocator>& __rhs) _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs))) { __lhs.swap(__rhs); } } // namespace __debug } // namespace std #endif Back

Edit File : multimap.h | Size : 19.25 KB

// Debugging multimap implementation -*- C++ -*-

// Copyright (C) 2003-2018 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/>.

/** @file debug/multimap.h
 *  This file is a GNU debug extension to the Standard C++ Library.
 */

#ifndef _GLIBCXX_DEBUG_MULTIMAP_H
#define _GLIBCXX_DEBUG_MULTIMAP_H 1

#include <debug/safe_sequence.h>
#include <debug/safe_container.h>
#include <debug/safe_iterator.h>
#include <utility>

namespace std _GLIBCXX_VISIBILITY(default)
{
namespace __debug
{
  /// Class std::multimap with safety/checking/debug instrumentation.
  template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>,
	   typename _Allocator = std::allocator<std::pair<const _Key, _Tp> > >
    class multimap
      : public __gnu_debug::_Safe_container<
	multimap<_Key, _Tp, _Compare, _Allocator>, _Allocator,
	__gnu_debug::_Safe_node_sequence>,
	public _GLIBCXX_STD_C::multimap<_Key, _Tp, _Compare, _Allocator>
    {
      typedef _GLIBCXX_STD_C::multimap<
	_Key, _Tp, _Compare, _Allocator>			_Base;
      typedef __gnu_debug::_Safe_container<
	multimap, _Allocator, __gnu_debug::_Safe_node_sequence>	_Safe;

typedef typename _Base::const_iterator	_Base_const_iterator;
      typedef typename _Base::iterator		_Base_iterator;
      typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;

public:
      // types:
      typedef _Key					key_type;
      typedef _Tp					mapped_type;
      typedef std::pair<const _Key, _Tp>		value_type;
      typedef _Compare					key_compare;
      typedef _Allocator				allocator_type;
      typedef typename _Base::reference			reference;
      typedef typename _Base::const_reference		const_reference;

typedef __gnu_debug::_Safe_iterator<_Base_iterator, multimap>
							iterator;
      typedef __gnu_debug::_Safe_iterator<_Base_const_iterator,
					  multimap>	const_iterator;

typedef typename _Base::size_type			size_type;
      typedef typename _Base::difference_type		difference_type;
      typedef typename _Base::pointer			pointer;
      typedef typename _Base::const_pointer		const_pointer;
      typedef std::reverse_iterator<iterator>		reverse_iterator;
      typedef std::reverse_iterator<const_iterator>	const_reverse_iterator;

// 23.3.1.1 construct/copy/destroy:

#if __cplusplus < 201103L
      multimap() : _Base() { }

multimap(const multimap& __x)
      : _Base(__x) { }

~multimap() { }
#else
      multimap() = default;
      multimap(const multimap&) = default;
      multimap(multimap&&) = default;

multimap(initializer_list<value_type> __l,
	       const _Compare& __c = _Compare(),
	       const allocator_type& __a = allocator_type())
      : _Base(__l, __c, __a) { }

explicit
      multimap(const allocator_type& __a)
      : _Base(__a) { }

multimap(const multimap& __m, const allocator_type& __a)
      : _Base(__m, __a) { }

multimap(multimap&& __m, const allocator_type& __a)
      noexcept( noexcept(_Base(std::move(__m._M_base()), __a)) )
      : _Safe(std::move(__m._M_safe()), __a),
	_Base(std::move(__m._M_base()), __a) { }

multimap(initializer_list<value_type> __l, const allocator_type& __a)
      : _Base(__l, __a) { }

template<typename _InputIterator>
	multimap(_InputIterator __first, _InputIterator __last,
		 const allocator_type& __a)
	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
								     __last)),
		__gnu_debug::__base(__last), __a) { }

~multimap() = default;
#endif

explicit multimap(const _Compare& __comp,
			const _Allocator& __a = _Allocator())
      : _Base(__comp, __a) { }

template<typename _InputIterator>
      multimap(_InputIterator __first, _InputIterator __last,
	       const _Compare& __comp = _Compare(),
	       const _Allocator& __a = _Allocator())
	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
								     __last)),
		__gnu_debug::__base(__last),
	      __comp, __a) { }

multimap(const _Base& __x)
      : _Base(__x) { }

#if __cplusplus < 201103L
      multimap&
      operator=(const multimap& __x)
      {
	this->_M_safe() = __x;
	_M_base() = __x;
	return *this;
      }
#else
      multimap&
      operator=(const multimap&) = default;

multimap&
      operator=(multimap&&) = default;

multimap&
      operator=(initializer_list<value_type> __l)
      {
	_M_base() = __l;
	this->_M_invalidate_all();
	return *this;
      }
#endif

using _Base::get_allocator;

// iterators:
      iterator
      begin() _GLIBCXX_NOEXCEPT
      { return iterator(_Base::begin(), this); }

const_iterator
      begin() const _GLIBCXX_NOEXCEPT
      { return const_iterator(_Base::begin(), this); }

iterator
      end() _GLIBCXX_NOEXCEPT
      { return iterator(_Base::end(), this); }

const_iterator
      end() const _GLIBCXX_NOEXCEPT
      { return const_iterator(_Base::end(), this); }

reverse_iterator
      rbegin() _GLIBCXX_NOEXCEPT
      { return reverse_iterator(end()); }

const_reverse_iterator
      rbegin() const _GLIBCXX_NOEXCEPT
      { return const_reverse_iterator(end()); }

reverse_iterator
      rend() _GLIBCXX_NOEXCEPT
      { return reverse_iterator(begin()); }

const_reverse_iterator
      rend() const _GLIBCXX_NOEXCEPT
      { return const_reverse_iterator(begin()); }

#if __cplusplus >= 201103L
      const_iterator
      cbegin() const noexcept
      { return const_iterator(_Base::begin(), this); }

const_iterator
      cend() const noexcept
      { return const_iterator(_Base::end(), this); }

const_reverse_iterator
      crbegin() const noexcept
      { return const_reverse_iterator(end()); }

const_reverse_iterator
      crend() const noexcept
      { return const_reverse_iterator(begin()); }
#endif

// capacity:
      using _Base::empty;
      using _Base::size;
      using _Base::max_size;

// modifiers:
#if __cplusplus >= 201103L
      template<typename... _Args>
	iterator
	emplace(_Args&&... __args)
	{
	  return iterator(_Base::emplace(std::forward<_Args>(__args)...), this);
	}

template<typename... _Args>
	iterator
	emplace_hint(const_iterator __pos, _Args&&... __args)
	{
	  __glibcxx_check_insert(__pos);
	  return iterator(_Base::emplace_hint(__pos.base(),
					      std::forward<_Args>(__args)...),
			  this);
	}
#endif

iterator
      insert(const value_type& __x)
      { return iterator(_Base::insert(__x), this); }

#if __cplusplus >= 201103L
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2354. Unnecessary copying when inserting into maps with braced-init
      iterator
      insert(value_type&& __x)
      { return { _Base::insert(std::move(__x)), this }; }

template<typename _Pair, typename = typename
	       std::enable_if<std::is_constructible<value_type,
						    _Pair&&>::value>::type>
	iterator
	insert(_Pair&& __x)
	{ return iterator(_Base::insert(std::forward<_Pair>(__x)), this); }
#endif

#if __cplusplus >= 201103L
      void
      insert(std::initializer_list<value_type> __list)
      { _Base::insert(__list); }
#endif

iterator
#if __cplusplus >= 201103L
      insert(const_iterator __position, const value_type& __x)
#else
      insert(iterator __position, const value_type& __x)
#endif
      {
	__glibcxx_check_insert(__position);
	return iterator(_Base::insert(__position.base(), __x), this);
      }

#if __cplusplus >= 201103L
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2354. Unnecessary copying when inserting into maps with braced-init
      iterator
      insert(const_iterator __position, value_type&& __x)
      {
	__glibcxx_check_insert(__position);
	return { _Base::insert(__position.base(), std::move(__x)), this };
      }

template<typename _Pair, typename = typename
	       std::enable_if<std::is_constructible<value_type,
						    _Pair&&>::value>::type>
	iterator
	insert(const_iterator __position, _Pair&& __x)
	{
	  __glibcxx_check_insert(__position);
	  return iterator(_Base::insert(__position.base(),
					std::forward<_Pair>(__x)), this);
	}
#endif

template<typename _InputIterator>
	void
	insert(_InputIterator __first, _InputIterator __last)
	{
	  typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
	  __glibcxx_check_valid_range2(__first, __last, __dist);

if (__dist.second >= __gnu_debug::__dp_sign)
	    _Base::insert(__gnu_debug::__unsafe(__first),
			  __gnu_debug::__unsafe(__last));
	  else
	    _Base::insert(__first, __last);
	}

#if __cplusplus > 201402L
      using node_type = typename _Base::node_type;

node_type
      extract(const_iterator __position)
      {
	__glibcxx_check_erase(__position);
	this->_M_invalidate_if(_Equal(__position.base()));
	return _Base::extract(__position.base());
      }

node_type
      extract(const key_type& __key)
      {
	const auto __position = find(__key);
	if (__position != end())
	  return extract(__position);
	return {};
      }

iterator
      insert(node_type&& __nh)
      { return iterator(_Base::insert(std::move(__nh)), this); }

iterator
      insert(const_iterator __hint, node_type&& __nh)
      {
	__glibcxx_check_insert(__hint);
	return iterator(_Base::insert(__hint.base(), std::move(__nh)), this);
      }

using _Base::merge;
#endif // C++17

#if __cplusplus >= 201103L
      iterator
      erase(const_iterator __position)
      {
	__glibcxx_check_erase(__position);
	this->_M_invalidate_if(_Equal(__position.base()));
	return iterator(_Base::erase(__position.base()), this);
      }

iterator
      erase(iterator __position)
      { return erase(const_iterator(__position)); }
#else
      void
      erase(iterator __position)
      {
	__glibcxx_check_erase(__position);
	this->_M_invalidate_if(_Equal(__position.base()));
	_Base::erase(__position.base());
      }
#endif

size_type
      erase(const key_type& __x)
      {
	std::pair<_Base_iterator, _Base_iterator> __victims =
	  _Base::equal_range(__x);
	size_type __count = 0;
	_Base_iterator __victim = __victims.first;
	while (__victim !=  __victims.second)
	  {
	    this->_M_invalidate_if(_Equal(__victim));
	    _Base::erase(__victim++);
	    ++__count;
	  }
	return __count;
      }

#if __cplusplus >= 201103L
      iterator
      erase(const_iterator __first, const_iterator __last)
      {
	// _GLIBCXX_RESOLVE_LIB_DEFECTS
	// 151. can't currently clear() empty container
	__glibcxx_check_erase_range(__first, __last);
	for (_Base_const_iterator __victim = __first.base();
	     __victim != __last.base(); ++__victim)
	  {
	    _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
				  _M_message(__gnu_debug::__msg_valid_range)
				  ._M_iterator(__first, "first")
				  ._M_iterator(__last, "last"));
	    this->_M_invalidate_if(_Equal(__victim));
	  }
	return iterator(_Base::erase(__first.base(), __last.base()), this);
      }
#else
      void
      erase(iterator __first, iterator __last)
      {
	// _GLIBCXX_RESOLVE_LIB_DEFECTS
	// 151. can't currently clear() empty container
	__glibcxx_check_erase_range(__first, __last);
	for (_Base_iterator __victim = __first.base();
	     __victim != __last.base(); ++__victim)
	  {
	    _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
				  _M_message(__gnu_debug::__msg_valid_range)
				  ._M_iterator(__first, "first")
				  ._M_iterator(__last, "last"));
	    this->_M_invalidate_if(_Equal(__victim));
	  }
	_Base::erase(__first.base(), __last.base());
      }
#endif

void
      swap(multimap& __x)
      _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) )
      {
	_Safe::_M_swap(__x);
	_Base::swap(__x);
      }

void
      clear() _GLIBCXX_NOEXCEPT
      {
	this->_M_invalidate_all();
	_Base::clear();
      }

// observers:
      using _Base::key_comp;
      using _Base::value_comp;

// 23.3.1.3 multimap operations:
      iterator
      find(const key_type& __x)
      { return iterator(_Base::find(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	iterator
	find(const _Kt& __x)
	{ return { _Base::find(__x), this }; }
#endif

const_iterator
      find(const key_type& __x) const
      { return const_iterator(_Base::find(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	const_iterator
	find(const _Kt& __x) const
	{ return { _Base::find(__x), this }; }
#endif

using _Base::count;

iterator
      lower_bound(const key_type& __x)
      { return iterator(_Base::lower_bound(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	iterator
	lower_bound(const _Kt& __x)
	{ return { _Base::lower_bound(__x), this }; }
#endif

const_iterator
      lower_bound(const key_type& __x) const
      { return const_iterator(_Base::lower_bound(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	const_iterator
	lower_bound(const _Kt& __x) const
	{ return { _Base::lower_bound(__x), this }; }
#endif

iterator
      upper_bound(const key_type& __x)
      { return iterator(_Base::upper_bound(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	iterator
	upper_bound(const _Kt& __x)
	{ return { _Base::upper_bound(__x), this }; }
#endif

const_iterator
      upper_bound(const key_type& __x) const
      { return const_iterator(_Base::upper_bound(__x), this); }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	const_iterator
	upper_bound(const _Kt& __x) const
	{ return { _Base::upper_bound(__x), this }; }
#endif

std::pair<iterator,iterator>
      equal_range(const key_type& __x)
      {
	std::pair<_Base_iterator, _Base_iterator> __res =
	_Base::equal_range(__x);
	return std::make_pair(iterator(__res.first, this),
			      iterator(__res.second, this));
      }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	std::pair<iterator, iterator>
	equal_range(const _Kt& __x)
	{
	  auto __res = _Base::equal_range(__x);
	  return { { __res.first, this }, { __res.second, this } };
	}
#endif

std::pair<const_iterator,const_iterator>
      equal_range(const key_type& __x) const
      {
	std::pair<_Base_const_iterator, _Base_const_iterator> __res =
	  _Base::equal_range(__x);
	return std::make_pair(const_iterator(__res.first, this),
			      const_iterator(__res.second, this));
      }

#if __cplusplus > 201103L
      template<typename _Kt,
	       typename _Req =
		 typename __has_is_transparent<_Compare, _Kt>::type>
	std::pair<const_iterator, const_iterator>
	equal_range(const _Kt& __x) const
	{
	  auto __res = _Base::equal_range(__x);
	  return { { __res.first, this }, { __res.second, this } };
	}
#endif

_Base&
      _M_base() _GLIBCXX_NOEXCEPT { return *this; }

const _Base&
      _M_base() const _GLIBCXX_NOEXCEPT { return *this; }
    };

#if __cpp_deduction_guides >= 201606

template<typename _InputIterator,
	   typename _Compare = less<__iter_key_t<_InputIterator>>,
	   typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    multimap(_InputIterator, _InputIterator,
	     _Compare = _Compare(), _Allocator = _Allocator())
    -> multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>,
		_Compare, _Allocator>;

template<typename _Key, typename _Tp, typename _Compare = less<_Key>,
	   typename _Allocator = allocator<pair<const _Key, _Tp>>,
	   typename = _RequireAllocator<_Allocator>>
    multimap(initializer_list<pair<_Key, _Tp>>,
	     _Compare = _Compare(), _Allocator = _Allocator())
    -> multimap<_Key, _Tp, _Compare, _Allocator>;

template<typename _InputIterator, typename _Allocator,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    multimap(_InputIterator, _InputIterator, _Allocator)
    -> multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>,
    less<__iter_key_t<_InputIterator>>, _Allocator>;

template<typename _Key, typename _Tp, typename _Allocator,
	   typename = _RequireAllocator<_Allocator>>
    multimap(initializer_list<pair<_Key, _Tp>>, _Allocator)
    -> multimap<_Key, _Tp, less<_Key>, _Allocator>;

#endif

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	       const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() == __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	       const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() != __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator<(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	      const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() < __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	       const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() <= __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	       const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() >= __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline bool
    operator>(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	      const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    { return __lhs._M_base() > __rhs._M_base(); }

template<typename _Key, typename _Tp,
	   typename _Compare, typename _Allocator>
    inline void
    swap(multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
	 multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
    _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
    { __lhs.swap(__rhs); }

} // namespace __debug
} // namespace std

#endif

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