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// Debugging unordered_map/unordered_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/unordered_map * This file is a GNU debug extension to the Standard C++ Library. / #ifndef _GLIBCXX_DEBUG_UNORDERED_MAP #define _GLIBCXX_DEBUG_UNORDERED_MAP 1 #pragma GCC system_header #if __cplusplus < 201103L # include <bits/c++0x_warning.h> #else # include <unordered_map> #include <debug/safe_unordered_container.h> #include <debug/safe_container.h> #include <debug/safe_iterator.h> #include <debug/safe_local_iterator.h> namespace std _GLIBCXX_VISIBILITY(default) { namespace __debug { /// Class std::unordered_map with safety/checking/debug instrumentation. template<typename _Key, typename _Tp, typename _Hash = std::hash<_Key>, typename _Pred = std::equal_to<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > > class unordered_map : public __gnu_debug::_Safe_container< unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc, __gnu_debug::_Safe_unordered_container>, public _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc> { typedef _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc> _Base; typedef __gnu_debug::_Safe_container<unordered_map, _Alloc, __gnu_debug::_Safe_unordered_container> _Safe; typedef typename _Base::const_iterator _Base_const_iterator; typedef typename _Base::iterator _Base_iterator; typedef typename _Base::const_local_iterator _Base_const_local_iterator; typedef typename _Base::local_iterator _Base_local_iterator; public: typedef typename _Base::size_type size_type; typedef typename _Base::hasher hasher; typedef typename _Base::key_equal key_equal; typedef typename _Base::allocator_type allocator_type; typedef typename _Base::key_type key_type; typedef typename _Base::value_type value_type; typedef __gnu_debug::_Safe_iterator< _Base_iterator, unordered_map> iterator; typedef __gnu_debug::_Safe_iterator< _Base_const_iterator, unordered_map> const_iterator; typedef __gnu_debug::_Safe_local_iterator< _Base_local_iterator, unordered_map> local_iterator; typedef __gnu_debug::_Safe_local_iterator< _Base_const_local_iterator, unordered_map> const_local_iterator; unordered_map() = default; explicit unordered_map(size_type __n, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__n, __hf, __eql, __a) { } template<typename _InputIterator> unordered_map(_InputIterator __first, _InputIterator __last, size_type __n = 0, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, __last)), __gnu_debug::__base(__last), __n, __hf, __eql, __a) { } unordered_map(const unordered_map&) = default; unordered_map(const _Base& __x) : _Base(__x) { } unordered_map(unordered_map&&) = default; explicit unordered_map(const allocator_type& __a) : _Base(__a) { } unordered_map(const unordered_map& __umap, const allocator_type& __a) : _Base(__umap, __a) { } unordered_map(unordered_map&& __umap, const allocator_type& __a) : _Safe(std::move(__umap._M_safe()), __a), _Base(std::move(__umap._M_base()), __a) { } unordered_map(initializer_list<value_type> __l, size_type __n = 0, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__l, __n, __hf, __eql, __a) { } unordered_map(size_type __n, const allocator_type& __a) : unordered_map(__n, hasher(), key_equal(), __a) { } unordered_map(size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_map(__n, __hf, key_equal(), __a) { } template<typename _InputIterator> unordered_map(_InputIterator __first, _InputIterator __last, size_type __n, const allocator_type& __a) : unordered_map(__first, __last, __n, hasher(), key_equal(), __a) { } template<typename _InputIterator> unordered_map(_InputIterator __first, _InputIterator __last, size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_map(__first, __last, __n, __hf, key_equal(), __a) { } unordered_map(initializer_list<value_type> __l, size_type __n, const allocator_type& __a) : unordered_map(__l, __n, hasher(), key_equal(), __a) { } unordered_map(initializer_list<value_type> __l, size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_map(__l, __n, __hf, key_equal(), __a) { } ~unordered_map() = default; unordered_map& operator=(const unordered_map&) = default; unordered_map& operator=(unordered_map&&) = default; unordered_map& operator=(initializer_list<value_type> __l) { _M_base() = __l; this->_M_invalidate_all(); return this; } void swap(unordered_map& __x) noexcept( noexcept(declval<_Base&>().swap(__x)) ) { _Safe::_M_swap(__x); _Base::swap(__x); } void clear() noexcept { _Base::clear(); this->_M_invalidate_all(); } iterator begin() noexcept { return iterator(_Base::begin(), this); } const_iterator begin() const noexcept { return const_iterator(_Base::begin(), this); } iterator end() noexcept { return iterator(_Base::end(), this); } const_iterator end() const noexcept { return const_iterator(_Base::end(), this); } const_iterator cbegin() const noexcept { return const_iterator(_Base::begin(), this); } const_iterator cend() const noexcept { return const_iterator(_Base::end(), this); } // local versions local_iterator begin(size_type __b) { __glibcxx_check_bucket_index(__b); return local_iterator(_Base::begin(__b), this); } local_iterator end(size_type __b) { __glibcxx_check_bucket_index(__b); return local_iterator(_Base::end(__b), this); } const_local_iterator begin(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::begin(__b), this); } const_local_iterator end(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::end(__b), this); } const_local_iterator cbegin(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::cbegin(__b), this); } const_local_iterator cend(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::cend(__b), this); } size_type bucket_size(size_type __b) const { __glibcxx_check_bucket_index(__b); return _Base::bucket_size(__b); } float max_load_factor() const noexcept { return _Base::max_load_factor(); } void max_load_factor(float __f) { __glibcxx_check_max_load_factor(__f); _Base::max_load_factor(__f); } template<typename... _Args> std::pair<iterator, bool> emplace(_Args&&... __args) { size_type __bucket_count = this->bucket_count(); std::pair<_Base_iterator, bool> __res = _Base::emplace(std::forward<_Args>(__args)...); _M_check_rehashed(__bucket_count); return std::make_pair(iterator(__res.first, this), __res.second); } template<typename... _Args> iterator emplace_hint(const_iterator __hint, _Args&&... __args) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::emplace_hint(__hint.base(), std::forward<_Args>(__args)...); _M_check_rehashed(__bucket_count); return iterator(__it, this); } std::pair<iterator, bool> insert(const value_type& __obj) { size_type __bucket_count = this->bucket_count(); auto __res = _Base::insert(__obj); _M_check_rehashed(__bucket_count); return { iterator(__res.first, this), __res.second }; } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init std::pair<iterator, bool> insert(value_type&& __x) { size_type __bucket_count = this->bucket_count(); auto __res = _Base::insert(std::move(__x)); _M_check_rehashed(__bucket_count); return { iterator(__res.first, this), __res.second }; } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> std::pair<iterator, bool> insert(_Pair&& __obj) { size_type __bucket_count = this->bucket_count(); std::pair<_Base_iterator, bool> __res = _Base::insert(std::forward<_Pair>(__obj)); _M_check_rehashed(__bucket_count); return std::make_pair(iterator(__res.first, this), __res.second); } iterator insert(const_iterator __hint, const value_type& __obj) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(__hint.base(), __obj); _M_check_rehashed(__bucket_count); return iterator(__it, this); } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init iterator insert(const_iterator __hint, value_type&& __x) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); auto __it = _Base::insert(__hint.base(), std::move(__x)); _M_check_rehashed(__bucket_count); return iterator(__it, this); } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> iterator insert(const_iterator __hint, _Pair&& __obj) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(__hint.base(), std::forward<_Pair>(__obj)); _M_check_rehashed(__bucket_count); return iterator(__it, this); } void insert(std::initializer_list<value_type> __l) { size_type __bucket_count = this->bucket_count(); _Base::insert(__l); _M_check_rehashed(__bucket_count); } template<typename _InputIterator> void insert(_InputIterator __first, _InputIterator __last) { typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; __glibcxx_check_valid_range2(__first, __last, __dist); size_type __bucket_count = this->bucket_count(); if (__dist.second >= __gnu_debug::__dp_sign) _Base::insert(__gnu_debug::__unsafe(__first), __gnu_debug::__unsafe(__last)); else _Base::insert(__first, __last); _M_check_rehashed(__bucket_count); } #if __cplusplus > 201402L template <typename... _Args> pair<iterator, bool> try_emplace(const key_type& __k, _Args&&... __args) { auto __res = _Base::try_emplace(__k, std::forward<_Args>(__args)...); return { iterator(__res.first, this), __res.second }; } template <typename... _Args> pair<iterator, bool> try_emplace(key_type&& __k, _Args&&... __args) { auto __res = _Base::try_emplace(std::move(__k), std::forward<_Args>(__args)...); return { iterator(__res.first, this), __res.second }; } template <typename... _Args> iterator try_emplace(const_iterator __hint, const key_type& __k, _Args&&... __args) { __glibcxx_check_insert(__hint); return iterator(_Base::try_emplace(__hint.base(), __k, std::forward<_Args>(__args)...), this); } template <typename... _Args> iterator try_emplace(const_iterator __hint, key_type&& __k, _Args&&... __args) { __glibcxx_check_insert(__hint); return iterator(_Base::try_emplace(__hint.base(), std::move(__k), std::forward<_Args>(__args)...), this); } template <typename _Obj> pair<iterator, bool> insert_or_assign(const key_type& __k, _Obj&& __obj) { auto __res = _Base::insert_or_assign(__k, std::forward<_Obj>(__obj)); return { iterator(__res.first, this), __res.second }; } template <typename _Obj> pair<iterator, bool> insert_or_assign(key_type&& __k, _Obj&& __obj) { auto __res = _Base::insert_or_assign(std::move(__k), std::forward<_Obj>(__obj)); return { iterator(__res.first, this), __res.second }; } template <typename _Obj> iterator insert_or_assign(const_iterator __hint, const key_type& __k, _Obj&& __obj) { __glibcxx_check_insert(__hint); return iterator(_Base::insert_or_assign(__hint.base(), __k, std::forward<_Obj>(__obj)), this); } template <typename _Obj> iterator insert_or_assign(const_iterator __hint, key_type&& __k, _Obj&& __obj) { __glibcxx_check_insert(__hint); return iterator(_Base::insert_or_assign(__hint.base(), std::move(__k), std::forward<_Obj>(__obj)), this); } #endif // C++17 #if __cplusplus > 201402L using node_type = typename _Base::node_type; using insert_return_type = _Node_insert_return<iterator, node_type>; node_type extract(const_iterator __position) { __glibcxx_check_erase(__position); _Base_const_iterator __victim = __position.base(); this->_M_invalidate_if( [__victim](_Base_const_iterator __it) { return __it == __victim; } ); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); return _Base::extract(__position.base()); } node_type extract(const key_type& __key) { const auto __position = find(__key); if (__position != end()) return extract(__position); return {}; } insert_return_type insert(node_type&& __nh) { auto __ret = _Base::insert(std::move(__nh)); iterator __pos = iterator(__ret.position, this); return { __pos, __ret.inserted, std::move(__ret.node) }; } 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 iterator find(const key_type& __key) { return iterator(_Base::find(__key), this); } const_iterator find(const key_type& __key) const { return const_iterator(_Base::find(__key), this); } std::pair<iterator, iterator> equal_range(const key_type& __key) { std::pair<_Base_iterator, _Base_iterator> __res = _Base::equal_range(__key); return std::make_pair(iterator(__res.first, this), iterator(__res.second, this)); } std::pair<const_iterator, const_iterator> equal_range(const key_type& __key) const { std::pair<_Base_const_iterator, _Base_const_iterator> __res = _Base::equal_range(__key); return std::make_pair(const_iterator(__res.first, this), const_iterator(__res.second, this)); } size_type erase(const key_type& __key) { size_type __ret(0); _Base_iterator __victim(_Base::find(__key)); if (__victim != _Base::end()) { this->_M_invalidate_if([__victim](_Base_const_iterator __it) { return __it == __victim; }); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); size_type __bucket_count = this->bucket_count(); _Base::erase(__victim); _M_check_rehashed(__bucket_count); __ret = 1; } return __ret; } iterator erase(const_iterator __it) { __glibcxx_check_erase(__it); _Base_const_iterator __victim = __it.base(); this->_M_invalidate_if([__victim](_Base_const_iterator __it) { return __it == __victim; }); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); size_type __bucket_count = this->bucket_count(); _Base_iterator __next = _Base::erase(__it.base()); _M_check_rehashed(__bucket_count); return iterator(__next, this); } iterator erase(iterator __it) { return erase(const_iterator(__it)); } iterator erase(const_iterator __first, const_iterator __last) { __glibcxx_check_erase_range(__first, __last); for (_Base_const_iterator __tmp = __first.base(); __tmp != __last.base(); ++__tmp) { _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::end(), _M_message(__gnu_debug::__msg_valid_range) ._M_iterator(__first, "first") ._M_iterator(__last, "last")); this->_M_invalidate_if([__tmp](_Base_const_iterator __it) { return __it == __tmp; }); this->_M_invalidate_local_if( [__tmp](_Base_const_local_iterator __it) { return __it._M_curr() == __tmp._M_cur; }); } size_type __bucket_count = this->bucket_count(); _Base_iterator __next = _Base::erase(__first.base(), __last.base()); _M_check_rehashed(__bucket_count); return iterator(__next, this); } _Base& _M_base() noexcept { return this; } const _Base& _M_base() const noexcept { return this; } private: void _M_check_rehashed(size_type __prev_count) { if (__prev_count != this->bucket_count()) this->_M_invalidate_locals(); } }; #if __cpp_deduction_guides >= 201606 template<typename _InputIterator, typename _Hash = hash<__iter_key_t<_InputIterator>>, typename _Pred = equal_to<__iter_key_t<_InputIterator>>, typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_map(_InputIterator, _InputIterator, typename unordered_map<int, int>::size_type = {}, _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator()) -> unordered_map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Hash, _Pred, _Allocator>; template<typename _Key, typename _Tp, typename _Hash = hash<_Key>, typename _Pred = equal_to<_Key>, typename _Allocator = allocator<pair<const _Key, _Tp>>, typename = _RequireAllocator<_Allocator>> unordered_map(initializer_list<pair<_Key, _Tp>>, typename unordered_map<int, int>::size_type = {}, _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator()) -> unordered_map<_Key, _Tp, _Hash, _Pred, _Allocator>; template<typename _InputIterator, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_map(_InputIterator, _InputIterator, typename unordered_map<int, int>::size_type, _Allocator) -> unordered_map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, hash<__iter_key_t<_InputIterator>>, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _InputIterator, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_map(_InputIterator, _InputIterator, _Allocator) -> unordered_map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, hash<__iter_key_t<_InputIterator>>, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _InputIterator, typename _Hash, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_map(_InputIterator, _InputIterator, typename unordered_map<int, int>::size_type, _Hash, _Allocator) -> unordered_map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Hash, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _Key, typename _Tp, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_map(initializer_list<pair<_Key, _Tp>>, typename unordered_map<int, int>::size_type, _Allocator) -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>; template<typename _Key, typename _Tp, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_map(initializer_list<pair<_Key, _Tp>>, _Allocator) -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>; template<typename _Key, typename _Tp, typename _Hash, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_map(initializer_list<pair<_Key, _Tp>>, typename unordered_map<int, int>::size_type, _Hash, _Allocator) -> unordered_map<_Key, _Tp, _Hash, equal_to<_Key>, _Allocator>; #endif template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline void swap(unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) noexcept(noexcept(__x.swap(__y))) { __x.swap(__y); } template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline bool operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) { return __x._M_base() == __y._M_base(); } template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline bool operator!=(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) { return !(__x == __y); } /// Class std::unordered_multimap with safety/checking/debug instrumentation. template<typename _Key, typename _Tp, typename _Hash = std::hash<_Key>, typename _Pred = std::equal_to<_Key>, typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > > class unordered_multimap : public __gnu_debug::_Safe_container< unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc, __gnu_debug::_Safe_unordered_container>, public _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc> { typedef _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc> _Base; typedef __gnu_debug::_Safe_container<unordered_multimap, _Alloc, __gnu_debug::_Safe_unordered_container> _Safe; typedef typename _Base::const_iterator _Base_const_iterator; typedef typename _Base::iterator _Base_iterator; typedef typename _Base::const_local_iterator _Base_const_local_iterator; typedef typename _Base::local_iterator _Base_local_iterator; public: typedef typename _Base::size_type size_type; typedef typename _Base::hasher hasher; typedef typename _Base::key_equal key_equal; typedef typename _Base::allocator_type allocator_type; typedef typename _Base::key_type key_type; typedef typename _Base::value_type value_type; typedef __gnu_debug::_Safe_iterator< _Base_iterator, unordered_multimap> iterator; typedef __gnu_debug::_Safe_iterator< _Base_const_iterator, unordered_multimap> const_iterator; typedef __gnu_debug::_Safe_local_iterator< _Base_local_iterator, unordered_multimap> local_iterator; typedef __gnu_debug::_Safe_local_iterator< _Base_const_local_iterator, unordered_multimap> const_local_iterator; unordered_multimap() = default; explicit unordered_multimap(size_type __n, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__n, __hf, __eql, __a) { } template<typename _InputIterator> unordered_multimap(_InputIterator __first, _InputIterator __last, size_type __n = 0, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first, __last)), __gnu_debug::__base(__last), __n, __hf, __eql, __a) { } unordered_multimap(const unordered_multimap&) = default; unordered_multimap(const _Base& __x) : _Base(__x) { } unordered_multimap(unordered_multimap&&) = default; explicit unordered_multimap(const allocator_type& __a) : _Base(__a) { } unordered_multimap(const unordered_multimap& __umap, const allocator_type& __a) : _Base(__umap, __a) { } unordered_multimap(unordered_multimap&& __umap, const allocator_type& __a) : _Safe(std::move(__umap._M_safe()), __a), _Base(std::move(__umap._M_base()), __a) { } unordered_multimap(initializer_list<value_type> __l, size_type __n = 0, const hasher& __hf = hasher(), const key_equal& __eql = key_equal(), const allocator_type& __a = allocator_type()) : _Base(__l, __n, __hf, __eql, __a) { } unordered_multimap(size_type __n, const allocator_type& __a) : unordered_multimap(__n, hasher(), key_equal(), __a) { } unordered_multimap(size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_multimap(__n, __hf, key_equal(), __a) { } template<typename _InputIterator> unordered_multimap(_InputIterator __first, _InputIterator __last, size_type __n, const allocator_type& __a) : unordered_multimap(__first, __last, __n, hasher(), key_equal(), __a) { } template<typename _InputIterator> unordered_multimap(_InputIterator __first, _InputIterator __last, size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_multimap(__first, __last, __n, __hf, key_equal(), __a) { } unordered_multimap(initializer_list<value_type> __l, size_type __n, const allocator_type& __a) : unordered_multimap(__l, __n, hasher(), key_equal(), __a) { } unordered_multimap(initializer_list<value_type> __l, size_type __n, const hasher& __hf, const allocator_type& __a) : unordered_multimap(__l, __n, __hf, key_equal(), __a) { } ~unordered_multimap() = default; unordered_multimap& operator=(const unordered_multimap&) = default; unordered_multimap& operator=(unordered_multimap&&) = default; unordered_multimap& operator=(initializer_list<value_type> __l) { this->_M_base() = __l; this->_M_invalidate_all(); return this; } void swap(unordered_multimap& __x) noexcept( noexcept(declval<_Base&>().swap(__x)) ) { _Safe::_M_swap(__x); _Base::swap(__x); } void clear() noexcept { _Base::clear(); this->_M_invalidate_all(); } iterator begin() noexcept { return iterator(_Base::begin(), this); } const_iterator begin() const noexcept { return const_iterator(_Base::begin(), this); } iterator end() noexcept { return iterator(_Base::end(), this); } const_iterator end() const noexcept { return const_iterator(_Base::end(), this); } const_iterator cbegin() const noexcept { return const_iterator(_Base::begin(), this); } const_iterator cend() const noexcept { return const_iterator(_Base::end(), this); } // local versions local_iterator begin(size_type __b) { __glibcxx_check_bucket_index(__b); return local_iterator(_Base::begin(__b), this); } local_iterator end(size_type __b) { __glibcxx_check_bucket_index(__b); return local_iterator(_Base::end(__b), this); } const_local_iterator begin(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::begin(__b), this); } const_local_iterator end(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::end(__b), this); } const_local_iterator cbegin(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::cbegin(__b), this); } const_local_iterator cend(size_type __b) const { __glibcxx_check_bucket_index(__b); return const_local_iterator(_Base::cend(__b), this); } size_type bucket_size(size_type __b) const { __glibcxx_check_bucket_index(__b); return _Base::bucket_size(__b); } float max_load_factor() const noexcept { return _Base::max_load_factor(); } void max_load_factor(float __f) { __glibcxx_check_max_load_factor(__f); _Base::max_load_factor(__f); } template<typename... _Args> iterator emplace(_Args&&... __args) { size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::emplace(std::forward<_Args>(__args)...); _M_check_rehashed(__bucket_count); return iterator(__it, this); } template<typename... _Args> iterator emplace_hint(const_iterator __hint, _Args&&... __args) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::emplace_hint(__hint.base(), std::forward<_Args>(__args)...); _M_check_rehashed(__bucket_count); return iterator(__it, this); } iterator insert(const value_type& __obj) { size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(__obj); _M_check_rehashed(__bucket_count); return iterator(__it, this); } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init iterator insert(value_type&& __x) { size_type __bucket_count = this->bucket_count(); auto __it = _Base::insert(std::move(__x)); _M_check_rehashed(__bucket_count); return { __it, this }; } iterator insert(const_iterator __hint, const value_type& __obj) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(__hint.base(), __obj); _M_check_rehashed(__bucket_count); return iterator(__it, this); } // _GLIBCXX_RESOLVE_LIB_DEFECTS // 2354. Unnecessary copying when inserting into maps with braced-init iterator insert(const_iterator __hint, value_type&& __x) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); auto __it = _Base::insert(__hint.base(), std::move(__x)); _M_check_rehashed(__bucket_count); return iterator(__it, this); } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> iterator insert(_Pair&& __obj) { size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(std::forward<_Pair>(__obj)); _M_check_rehashed(__bucket_count); return iterator(__it, this); } template<typename _Pair, typename = typename std::enable_if<std::is_constructible<value_type, _Pair&&>::value>::type> iterator insert(const_iterator __hint, _Pair&& __obj) { __glibcxx_check_insert(__hint); size_type __bucket_count = this->bucket_count(); _Base_iterator __it = _Base::insert(__hint.base(), std::forward<_Pair>(__obj)); _M_check_rehashed(__bucket_count); return iterator(__it, this); } void insert(std::initializer_list<value_type> __l) { _Base::insert(__l); } template<typename _InputIterator> void insert(_InputIterator __first, _InputIterator __last) { typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist; __glibcxx_check_valid_range2(__first, __last, __dist); size_type __bucket_count = this->bucket_count(); if (__dist.second >= __gnu_debug::__dp_sign) _Base::insert(__gnu_debug::__unsafe(__first), __gnu_debug::__unsafe(__last)); else _Base::insert(__first, __last); _M_check_rehashed(__bucket_count); } #if __cplusplus > 201402L using node_type = typename _Base::node_type; node_type extract(const_iterator __position) { __glibcxx_check_erase(__position); _Base_const_iterator __victim = __position.base(); this->_M_invalidate_if( [__victim](_Base_const_iterator __it) { return __it == __victim; } ); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); 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 iterator find(const key_type& __key) { return iterator(_Base::find(__key), this); } const_iterator find(const key_type& __key) const { return const_iterator(_Base::find(__key), this); } std::pair<iterator, iterator> equal_range(const key_type& __key) { std::pair<_Base_iterator, _Base_iterator> __res = _Base::equal_range(__key); return std::make_pair(iterator(__res.first, this), iterator(__res.second, this)); } std::pair<const_iterator, const_iterator> equal_range(const key_type& __key) const { std::pair<_Base_const_iterator, _Base_const_iterator> __res = _Base::equal_range(__key); return std::make_pair(const_iterator(__res.first, this), const_iterator(__res.second, this)); } size_type erase(const key_type& __key) { size_type __ret(0); size_type __bucket_count = this->bucket_count(); std::pair<_Base_iterator, _Base_iterator> __pair = _Base::equal_range(__key); for (_Base_iterator __victim = __pair.first; __victim != __pair.second;) { this->_M_invalidate_if([__victim](_Base_const_iterator __it) { return __it == __victim; }); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); _Base::erase(__victim++); ++__ret; } _M_check_rehashed(__bucket_count); return __ret; } iterator erase(const_iterator __it) { __glibcxx_check_erase(__it); _Base_const_iterator __victim = __it.base(); this->_M_invalidate_if([__victim](_Base_const_iterator __it) { return __it == __victim; }); this->_M_invalidate_local_if( [__victim](_Base_const_local_iterator __it) { return __it._M_curr() == __victim._M_cur; }); size_type __bucket_count = this->bucket_count(); _Base_iterator __next = _Base::erase(__it.base()); _M_check_rehashed(__bucket_count); return iterator(__next, this); } iterator erase(iterator __it) { return erase(const_iterator(__it)); } iterator erase(const_iterator __first, const_iterator __last) { __glibcxx_check_erase_range(__first, __last); for (_Base_const_iterator __tmp = __first.base(); __tmp != __last.base(); ++__tmp) { _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::end(), _M_message(__gnu_debug::__msg_valid_range) ._M_iterator(__first, "first") ._M_iterator(__last, "last")); this->_M_invalidate_if([__tmp](_Base_const_iterator __it) { return __it == __tmp; }); this->_M_invalidate_local_if( [__tmp](_Base_const_local_iterator __it) { return __it._M_curr() == __tmp._M_cur; }); } size_type __bucket_count = this->bucket_count(); _Base_iterator __next = _Base::erase(__first.base(), __last.base()); _M_check_rehashed(__bucket_count); return iterator(__next, this); } _Base& _M_base() noexcept { return this; } const _Base& _M_base() const noexcept { return *this; } private: void _M_check_rehashed(size_type __prev_count) { if (__prev_count != this->bucket_count()) this->_M_invalidate_locals(); } }; #if __cpp_deduction_guides >= 201606 template<typename _InputIterator, typename _Hash = hash<__iter_key_t<_InputIterator>>, typename _Pred = equal_to<__iter_key_t<_InputIterator>>, typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_multimap(_InputIterator, _InputIterator, unordered_multimap<int, int>::size_type = {}, _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator()) -> unordered_multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Hash, _Pred, _Allocator>; template<typename _Key, typename _Tp, typename _Hash = hash<_Key>, typename _Pred = equal_to<_Key>, typename _Allocator = allocator<pair<const _Key, _Tp>>, typename = _RequireAllocator<_Allocator>> unordered_multimap(initializer_list<pair<_Key, _Tp>>, unordered_multimap<int, int>::size_type = {}, _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator()) -> unordered_multimap<_Key, _Tp, _Hash, _Pred, _Allocator>; template<typename _InputIterator, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_multimap(_InputIterator, _InputIterator, unordered_multimap<int, int>::size_type, _Allocator) -> unordered_multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, hash<__iter_key_t<_InputIterator>>, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _InputIterator, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_multimap(_InputIterator, _InputIterator, _Allocator) -> unordered_multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, hash<__iter_key_t<_InputIterator>>, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _InputIterator, typename _Hash, typename _Allocator, typename = _RequireInputIter<_InputIterator>, typename = _RequireAllocator<_Allocator>> unordered_multimap(_InputIterator, _InputIterator, unordered_multimap<int, int>::size_type, _Hash, _Allocator) -> unordered_multimap<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>, _Hash, equal_to<__iter_key_t<_InputIterator>>, _Allocator>; template<typename _Key, typename _Tp, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_multimap(initializer_list<pair<_Key, _Tp>>, unordered_multimap<int, int>::size_type, _Allocator) -> unordered_multimap<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>; template<typename _Key, typename _Tp, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_multimap(initializer_list<pair<_Key, _Tp>>, _Allocator) -> unordered_multimap<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>; template<typename _Key, typename _Tp, typename _Hash, typename _Allocator, typename = _RequireAllocator<_Allocator>> unordered_multimap(initializer_list<pair<_Key, _Tp>>, unordered_multimap<int, int>::size_type, _Hash, _Allocator) -> unordered_multimap<_Key, _Tp, _Hash, equal_to<_Key>, _Allocator>; #endif template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline void swap(unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) noexcept(noexcept(__x.swap(__y))) { __x.swap(__y); } template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline bool operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) { return __x._M_base() == __y._M_base(); } template<typename _Key, typename _Tp, typename _Hash, typename _Pred, typename _Alloc> inline bool operator!=(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x, const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y) { return !(__x == __y); } } // namespace __debug } // namespace std #endif // C++11 #endif Back

Edit File : unordered_map | Size : 41.07 KB

// Debugging unordered_map/unordered_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/unordered_map
 *  This file is a GNU debug extension to the Standard C++ Library.
 */

#ifndef _GLIBCXX_DEBUG_UNORDERED_MAP
#define _GLIBCXX_DEBUG_UNORDERED_MAP 1

#pragma GCC system_header

#if __cplusplus < 201103L
# include <bits/c++0x_warning.h>
#else
# include <unordered_map>

#include <debug/safe_unordered_container.h>
#include <debug/safe_container.h>
#include <debug/safe_iterator.h>
#include <debug/safe_local_iterator.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
namespace __debug
{
  /// Class std::unordered_map with safety/checking/debug instrumentation.
  template<typename _Key, typename _Tp,
	   typename _Hash = std::hash<_Key>,
	   typename _Pred = std::equal_to<_Key>,
	   typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
    class unordered_map
    : public __gnu_debug::_Safe_container<
	unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
	__gnu_debug::_Safe_unordered_container>,
      public _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>
    {
      typedef _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash,
					    _Pred, _Alloc>		_Base;
      typedef __gnu_debug::_Safe_container<unordered_map,
		   _Alloc, __gnu_debug::_Safe_unordered_container>	_Safe;
      typedef typename _Base::const_iterator	_Base_const_iterator;
      typedef typename _Base::iterator		_Base_iterator;
      typedef typename _Base::const_local_iterator
						_Base_const_local_iterator;
      typedef typename _Base::local_iterator	_Base_local_iterator;

public:
      typedef typename _Base::size_type			size_type;
      typedef typename _Base::hasher			hasher;
      typedef typename _Base::key_equal			key_equal;
      typedef typename _Base::allocator_type		allocator_type;

typedef typename _Base::key_type			key_type;
      typedef typename _Base::value_type		value_type;

typedef __gnu_debug::_Safe_iterator<
	_Base_iterator, unordered_map>			iterator;
      typedef __gnu_debug::_Safe_iterator<
	_Base_const_iterator, unordered_map>		const_iterator;
      typedef __gnu_debug::_Safe_local_iterator<
	_Base_local_iterator, unordered_map>		local_iterator;
      typedef __gnu_debug::_Safe_local_iterator<
	_Base_const_local_iterator, unordered_map>	const_local_iterator;

unordered_map() = default;

explicit
      unordered_map(size_type __n,
		    const hasher& __hf = hasher(),
		    const key_equal& __eql = key_equal(),
		    const allocator_type& __a = allocator_type())
      : _Base(__n, __hf, __eql, __a) { }

template<typename _InputIterator>
	unordered_map(_InputIterator __first, _InputIterator __last,
		      size_type __n = 0,
		      const hasher& __hf = hasher(),
		      const key_equal& __eql = key_equal(),
		      const allocator_type& __a = allocator_type())
	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
								     __last)),
		__gnu_debug::__base(__last), __n,
		__hf, __eql, __a) { }

unordered_map(const unordered_map&) = default;

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

unordered_map(unordered_map&&) = default;

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

unordered_map(const unordered_map& __umap,
		    const allocator_type& __a)
      : _Base(__umap, __a) { }

unordered_map(unordered_map&& __umap,
		    const allocator_type& __a)
      : _Safe(std::move(__umap._M_safe()), __a),
	_Base(std::move(__umap._M_base()), __a) { }

unordered_map(initializer_list<value_type> __l,
		    size_type __n = 0,
		    const hasher& __hf = hasher(),
		    const key_equal& __eql = key_equal(),
		    const allocator_type& __a = allocator_type())
      : _Base(__l, __n, __hf, __eql, __a) { }

unordered_map(size_type __n, const allocator_type& __a)
      : unordered_map(__n, hasher(), key_equal(), __a)
      { }

unordered_map(size_type __n,
		    const hasher& __hf,
		    const allocator_type& __a)
      : unordered_map(__n, __hf, key_equal(), __a)
      { }

template<typename _InputIterator>
	unordered_map(_InputIterator __first, _InputIterator __last,
		      size_type __n,
		      const allocator_type& __a)
	  : unordered_map(__first, __last, __n, hasher(), key_equal(), __a)
	{ }

template<typename _InputIterator>
	unordered_map(_InputIterator __first, _InputIterator __last,
		      size_type __n,
		      const hasher& __hf,
		      const allocator_type& __a)
	  : unordered_map(__first, __last, __n, __hf, key_equal(), __a)
	{ }

unordered_map(initializer_list<value_type> __l,
		    size_type __n,
		    const allocator_type& __a)
	: unordered_map(__l, __n, hasher(), key_equal(), __a)
      { }

unordered_map(initializer_list<value_type> __l,
		    size_type __n,
		    const hasher& __hf,
		    const allocator_type& __a)
	: unordered_map(__l, __n, __hf, key_equal(), __a)
      { }

~unordered_map() = default;

unordered_map&
      operator=(const unordered_map&) = default;

unordered_map&
      operator=(unordered_map&&) = default;

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

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

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

iterator
      begin() noexcept
      { return iterator(_Base::begin(), this); }

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

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

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

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

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

// local versions
      local_iterator
      begin(size_type __b)
      {
	__glibcxx_check_bucket_index(__b);
	return local_iterator(_Base::begin(__b), this);
      }

local_iterator
      end(size_type __b)
      {
	__glibcxx_check_bucket_index(__b);
	return local_iterator(_Base::end(__b), this);
      }

const_local_iterator
      begin(size_type __b) const
      {
	__glibcxx_check_bucket_index(__b);
	return const_local_iterator(_Base::begin(__b), this);
      }

const_local_iterator
      end(size_type __b) const
      {
	__glibcxx_check_bucket_index(__b);
	return const_local_iterator(_Base::end(__b), this);
      }

const_local_iterator
      cbegin(size_type __b) const
      {
	__glibcxx_check_bucket_index(__b);
	return const_local_iterator(_Base::cbegin(__b), this);
      }

const_local_iterator
      cend(size_type __b) const
      {
	__glibcxx_check_bucket_index(__b);
	return const_local_iterator(_Base::cend(__b), this);
      }

size_type
      bucket_size(size_type __b) const
      {
	__glibcxx_check_bucket_index(__b);
	return _Base::bucket_size(__b);
      }

float
      max_load_factor() const noexcept
      { return _Base::max_load_factor(); }

void
      max_load_factor(float __f)
      {
	__glibcxx_check_max_load_factor(__f);
	_Base::max_load_factor(__f);
      }

template<typename... _Args>
	std::pair<iterator, bool>
	emplace(_Args&&... __args)
	{
	  size_type __bucket_count = this->bucket_count();
	  std::pair<_Base_iterator, bool> __res
	    = _Base::emplace(std::forward<_Args>(__args)...);
	  _M_check_rehashed(__bucket_count);
	  return std::make_pair(iterator(__res.first, this), __res.second);
	}

template<typename... _Args>
	iterator
	emplace_hint(const_iterator __hint, _Args&&... __args)
	{
	  __glibcxx_check_insert(__hint);
	  size_type __bucket_count = this->bucket_count();
	  _Base_iterator __it = _Base::emplace_hint(__hint.base(),
					std::forward<_Args>(__args)...);
	  _M_check_rehashed(__bucket_count);
	  return iterator(__it, this);
	}

std::pair<iterator, bool>
      insert(const value_type& __obj)
      {
	size_type __bucket_count = this->bucket_count();
	auto __res = _Base::insert(__obj);
	_M_check_rehashed(__bucket_count);
	return { iterator(__res.first, this), __res.second };
      }

// _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2354. Unnecessary copying when inserting into maps with braced-init
      std::pair<iterator, bool>
      insert(value_type&& __x)
      {
	size_type __bucket_count = this->bucket_count();
	auto __res = _Base::insert(std::move(__x));
	_M_check_rehashed(__bucket_count);
	return { iterator(__res.first, this), __res.second };
      }

template<typename _Pair, typename = typename
	       std::enable_if<std::is_constructible<value_type,
						    _Pair&&>::value>::type>
	std::pair<iterator, bool>
	insert(_Pair&& __obj)
	{
	  size_type __bucket_count = this->bucket_count();
	  std::pair<_Base_iterator, bool> __res =
	    _Base::insert(std::forward<_Pair>(__obj));
	  _M_check_rehashed(__bucket_count);
	  return std::make_pair(iterator(__res.first, this), __res.second);
	}

iterator
      insert(const_iterator __hint, const value_type& __obj)
      {
	__glibcxx_check_insert(__hint);
	size_type __bucket_count = this->bucket_count();
	_Base_iterator __it = _Base::insert(__hint.base(), __obj);
	_M_check_rehashed(__bucket_count);
	return iterator(__it, this);
      }

// _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2354. Unnecessary copying when inserting into maps with braced-init
      iterator
      insert(const_iterator __hint, value_type&& __x)
      {
	__glibcxx_check_insert(__hint);
	size_type __bucket_count = this->bucket_count();
	auto __it = _Base::insert(__hint.base(), std::move(__x));
	_M_check_rehashed(__bucket_count);
	return iterator(__it, this);
      }

template<typename _Pair, typename = typename
	       std::enable_if<std::is_constructible<value_type,
						    _Pair&&>::value>::type>
	iterator
	insert(const_iterator __hint, _Pair&& __obj)
	{
	  __glibcxx_check_insert(__hint);
	  size_type __bucket_count = this->bucket_count();
	  _Base_iterator __it =
	    _Base::insert(__hint.base(), std::forward<_Pair>(__obj));
	  _M_check_rehashed(__bucket_count);
	  return iterator(__it, this);
	}

void
      insert(std::initializer_list<value_type> __l)
      {
	size_type __bucket_count = this->bucket_count();
	_Base::insert(__l);
	_M_check_rehashed(__bucket_count);
      }

template<typename _InputIterator>
	void
	insert(_InputIterator __first, _InputIterator __last)
	{
	  typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
	  __glibcxx_check_valid_range2(__first, __last, __dist);
	  size_type __bucket_count = this->bucket_count();

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

_M_check_rehashed(__bucket_count);
	}

#if __cplusplus > 201402L
      template <typename... _Args>
        pair<iterator, bool>
        try_emplace(const key_type& __k, _Args&&... __args)
        {
	  auto __res = _Base::try_emplace(__k,
					  std::forward<_Args>(__args)...);
	  return { iterator(__res.first, this), __res.second };
	}

template <typename... _Args>
        pair<iterator, bool>
        try_emplace(key_type&& __k, _Args&&... __args)
        {
	  auto __res = _Base::try_emplace(std::move(__k),
					  std::forward<_Args>(__args)...);
	  return { iterator(__res.first, this), __res.second };
	}

template <typename... _Args>
        iterator
        try_emplace(const_iterator __hint, const key_type& __k,
                    _Args&&... __args)
        {
	  __glibcxx_check_insert(__hint);
	  return iterator(_Base::try_emplace(__hint.base(), __k,
					     std::forward<_Args>(__args)...),
			  this);
	}

template <typename... _Args>
        iterator
        try_emplace(const_iterator __hint, key_type&& __k, _Args&&... __args)
        {
	  __glibcxx_check_insert(__hint);
	  return iterator(_Base::try_emplace(__hint.base(), std::move(__k),
					     std::forward<_Args>(__args)...),
			  this);
	}

template <typename _Obj>
        pair<iterator, bool>
        insert_or_assign(const key_type& __k, _Obj&& __obj)
        {
	  auto __res = _Base::insert_or_assign(__k,
					       std::forward<_Obj>(__obj));
	  return { iterator(__res.first, this), __res.second };
	}

template <typename _Obj>
        pair<iterator, bool>
        insert_or_assign(key_type&& __k, _Obj&& __obj)
        {
	  auto __res = _Base::insert_or_assign(std::move(__k),
					       std::forward<_Obj>(__obj));
	  return { iterator(__res.first, this), __res.second };
	}

template <typename _Obj>
        iterator
        insert_or_assign(const_iterator __hint, const key_type& __k,
                         _Obj&& __obj)
        {
	  __glibcxx_check_insert(__hint);
	  return iterator(_Base::insert_or_assign(__hint.base(), __k,
						  std::forward<_Obj>(__obj)),
			  this);
	}

template <typename _Obj>
        iterator
        insert_or_assign(const_iterator __hint, key_type&& __k, _Obj&& __obj)
        {
	  __glibcxx_check_insert(__hint);
	  return iterator(_Base::insert_or_assign(__hint.base(),
						  std::move(__k),
						  std::forward<_Obj>(__obj)),
			  this);
	}
#endif // C++17

#if __cplusplus > 201402L
      using node_type = typename _Base::node_type;
      using insert_return_type = _Node_insert_return<iterator, node_type>;

node_type
      extract(const_iterator __position)
      {
	__glibcxx_check_erase(__position);
	_Base_const_iterator __victim = __position.base();
	this->_M_invalidate_if(
	    [__victim](_Base_const_iterator __it) { return __it == __victim; }
	    );
	this->_M_invalidate_local_if(
	    [__victim](_Base_const_local_iterator __it) {
		return __it._M_curr() == __victim._M_cur;
	    });
	return _Base::extract(__position.base());
      }

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

insert_return_type
      insert(node_type&& __nh)
      {
	auto __ret = _Base::insert(std::move(__nh));
	iterator __pos = iterator(__ret.position, this);
	return { __pos, __ret.inserted, std::move(__ret.node) };
      }

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

iterator
      find(const key_type& __key)
      { return iterator(_Base::find(__key), this); }

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

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

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

size_type
      erase(const key_type& __key)
      {
	size_type __ret(0);
	_Base_iterator __victim(_Base::find(__key));
	if (__victim != _Base::end())
	  {
	    this->_M_invalidate_if([__victim](_Base_const_iterator __it)
			    { return __it == __victim; });
	    this->_M_invalidate_local_if(
			    [__victim](_Base_const_local_iterator __it)
			    { return __it._M_curr() == __victim._M_cur; });
	    size_type __bucket_count = this->bucket_count();
	    _Base::erase(__victim);
	    _M_check_rehashed(__bucket_count);
	    __ret = 1;
	  }
	return __ret;
      }

iterator
      erase(const_iterator __it)
      {
	__glibcxx_check_erase(__it);
	_Base_const_iterator __victim = __it.base();
	this->_M_invalidate_if([__victim](_Base_const_iterator __it)
			{ return __it == __victim; });
	this->_M_invalidate_local_if(
			[__victim](_Base_const_local_iterator __it)
			{ return __it._M_curr() == __victim._M_cur; });
	size_type __bucket_count = this->bucket_count();
	_Base_iterator __next = _Base::erase(__it.base());
	_M_check_rehashed(__bucket_count);
	return iterator(__next, this);
      }

iterator
      erase(iterator __it)
      { return erase(const_iterator(__it)); }

iterator
      erase(const_iterator __first, const_iterator __last)
      {
	__glibcxx_check_erase_range(__first, __last);
	for (_Base_const_iterator __tmp = __first.base();
	     __tmp != __last.base(); ++__tmp)
	  {
	    _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::end(),
				  _M_message(__gnu_debug::__msg_valid_range)
				  ._M_iterator(__first, "first")
				  ._M_iterator(__last, "last"));
	    this->_M_invalidate_if([__tmp](_Base_const_iterator __it)
			    { return __it == __tmp; });
	    this->_M_invalidate_local_if(
			    [__tmp](_Base_const_local_iterator __it)
			    { return __it._M_curr() == __tmp._M_cur; });
	  }
	size_type __bucket_count = this->bucket_count();
	_Base_iterator __next = _Base::erase(__first.base(), __last.base());
	_M_check_rehashed(__bucket_count);
	return iterator(__next, this);
      }

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

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

private:
      void
      _M_check_rehashed(size_type __prev_count)
      {
	if (__prev_count != this->bucket_count())
	  this->_M_invalidate_locals();
      }
    };

#if __cpp_deduction_guides >= 201606

template<typename _InputIterator,
	   typename _Hash = hash<__iter_key_t<_InputIterator>>,
	   typename _Pred = equal_to<__iter_key_t<_InputIterator>>,
	   typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(_InputIterator, _InputIterator,
		  typename unordered_map<int, int>::size_type = {},
		  _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator())
    -> unordered_map<__iter_key_t<_InputIterator>,
		     __iter_val_t<_InputIterator>,
		     _Hash, _Pred, _Allocator>;

template<typename _Key, typename _Tp, typename _Hash = hash<_Key>,
	   typename _Pred = equal_to<_Key>,
	   typename _Allocator = allocator<pair<const _Key, _Tp>>,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(initializer_list<pair<_Key, _Tp>>,
		  typename unordered_map<int, int>::size_type = {},
		  _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator())
    -> unordered_map<_Key, _Tp, _Hash, _Pred, _Allocator>;

template<typename _InputIterator, typename _Allocator,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(_InputIterator, _InputIterator,
		  typename unordered_map<int, int>::size_type, _Allocator)
    -> unordered_map<__iter_key_t<_InputIterator>,
		     __iter_val_t<_InputIterator>,
		     hash<__iter_key_t<_InputIterator>>,
		     equal_to<__iter_key_t<_InputIterator>>,
		     _Allocator>;

template<typename _InputIterator, typename _Allocator,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(_InputIterator, _InputIterator, _Allocator)
    -> unordered_map<__iter_key_t<_InputIterator>,
		     __iter_val_t<_InputIterator>,
		     hash<__iter_key_t<_InputIterator>>,
		     equal_to<__iter_key_t<_InputIterator>>,
		     _Allocator>;

template<typename _InputIterator, typename _Hash, typename _Allocator,
	   typename = _RequireInputIter<_InputIterator>,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(_InputIterator, _InputIterator,
		  typename unordered_map<int, int>::size_type,
		  _Hash, _Allocator)
    -> unordered_map<__iter_key_t<_InputIterator>,
		     __iter_val_t<_InputIterator>, _Hash,
		     equal_to<__iter_key_t<_InputIterator>>, _Allocator>;

template<typename _Key, typename _Tp, typename _Allocator,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(initializer_list<pair<_Key, _Tp>>,
		  typename unordered_map<int, int>::size_type,
		  _Allocator)
    -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;

template<typename _Key, typename _Tp, typename _Allocator,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(initializer_list<pair<_Key, _Tp>>, _Allocator)
    -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;

template<typename _Key, typename _Tp, typename _Hash, typename _Allocator,
	   typename = _RequireAllocator<_Allocator>>
    unordered_map(initializer_list<pair<_Key, _Tp>>,
		  typename unordered_map<int, int>::size_type,
		  _Hash, _Allocator)
    -> unordered_map<_Key, _Tp, _Hash, equal_to<_Key>, _Allocator>;

#endif

template<typename _Key, typename _Tp, typename _Hash,
	   typename _Pred, typename _Alloc>
    inline void
    swap(unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
	 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
    noexcept(noexcept(__x.swap(__y)))
    { __x.swap(__y); }

template<typename _Key, typename _Tp, typename _Hash,
	   typename _Pred, typename _Alloc>
    inline bool
    operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
	       const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
    { return __x._M_base() == __y._M_base(); }

template<typename _Key, typename _Tp, typename _Hash,
	   typename _Pred, typename _Alloc>
    inline bool
    operator!=(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
	       const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
    { return !(__x == __y); }

/// Class std::unordered_multimap with safety/checking/debug instrumentation.
  template<typename _Key, typename _Tp,
	   typename _Hash = std::hash<_Key>,
	   typename _Pred = std::equal_to<_Key>,
	   typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
    class unordered_multimap
      : public __gnu_debug::_Safe_container<
	unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
	__gnu_debug::_Safe_unordered_container>,
	public _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>
    {
      typedef _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash,
						 _Pred, _Alloc>		_Base;
      typedef __gnu_debug::_Safe_container<unordered_multimap,
	_Alloc, __gnu_debug::_Safe_unordered_container>			_Safe;
      typedef typename _Base::const_iterator	   _Base_const_iterator;
      typedef typename _Base::iterator		   _Base_iterator;
      typedef typename _Base::const_local_iterator _Base_const_local_iterator;
      typedef typename _Base::local_iterator	   _Base_local_iterator;

typedef typename _Base::key_type			key_type;
      typedef typename _Base::value_type		value_type;

typedef __gnu_debug::_Safe_iterator<
	_Base_iterator, unordered_multimap>		iterator;
      typedef __gnu_debug::_Safe_iterator<
	_Base_const_iterator, unordered_multimap>	const_iterator;
      typedef __gnu_debug::_Safe_local_iterator<
	_Base_local_iterator, unordered_multimap>	local_iterator;
      typedef __gnu_debug::_Safe_local_iterator<
	_Base_const_local_iterator, unordered_multimap> const_local_iterator;

unordered_multimap() = default;

explicit
      unordered_multimap(size_type __n,
			 const hasher& __hf = hasher(),
			 const key_equal& __eql = key_equal(),
			 const allocator_type& __a = allocator_type())
      : _Base(__n, __hf, __eql, __a) { }

template<typename _InputIterator>
	unordered_multimap(_InputIterator __first, _InputIterator __last,
			   size_type __n = 0,
			   const hasher& __hf = hasher(),
			   const key_equal& __eql = key_equal(),
			   const allocator_type& __a = allocator_type())
	: _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
								     __last)),
		__gnu_debug::__base(__last), __n,
		__hf, __eql, __a) { }

unordered_multimap(const unordered_multimap&) = default;

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

unordered_multimap(unordered_multimap&&) = default;

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

unordered_multimap(const unordered_multimap& __umap,
			 const allocator_type& __a)
      : _Base(__umap, __a) { }

unordered_multimap(unordered_multimap&& __umap,
			 const allocator_type& __a)
      : _Safe(std::move(__umap._M_safe()), __a),
	_Base(std::move(__umap._M_base()), __a) { }

unordered_multimap(initializer_list<value_type> __l,
			 size_type __n = 0,
			 const hasher& __hf = hasher(),
			 const key_equal& __eql = key_equal(),
			 const allocator_type& __a = allocator_type())
      : _Base(__l, __n, __hf, __eql, __a) { }

unordered_multimap(size_type __n, const allocator_type& __a)
      : unordered_multimap(__n, hasher(), key_equal(), __a)
      { }

unordered_multimap(size_type __n, const hasher& __hf,
			 const allocator_type& __a)
      : unordered_multimap(__n, __hf, key_equal(), __a)
      { }

template<typename _InputIterator>
	unordered_multimap(_InputIterator __first, _InputIterator __last,
			   size_type __n,
			   const allocator_type& __a)
	  : unordered_multimap(__first, __last, __n, hasher(), key_equal(), __a)
	{ }

template<typename _InputIterator>
	unordered_multimap(_InputIterator __first, _InputIterator __last,
			   size_type __n, const hasher& __hf,
			   const allocator_type& __a)
	  : unordered_multimap(__first, __last, __n, __hf, key_equal(), __a)
	{ }

unordered_multimap(initializer_list<value_type> __l,
			 size_type __n,
			 const allocator_type& __a)
	: unordered_multimap(__l, __n, hasher(), key_equal(), __a)
      { }

unordered_multimap(initializer_list<value_type> __l,
			 size_type __n, const hasher& __hf,
			 const allocator_type& __a)
	: unordered_multimap(__l, __n, __hf, key_equal(), __a)
      { }

~unordered_multimap() = default;

unordered_multimap&
      operator=(const unordered_multimap&) = default;

unordered_multimap&
      operator=(unordered_multimap&&) = default;

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

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