| // -*- C++ -*- | 
 | //===----------------------------------------------------------------------===// | 
 | // | 
 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | 
 | // See https://llvm.org/LICENSE.txt for license information. | 
 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | 
 | // | 
 | //===----------------------------------------------------------------------===// | 
 |  | 
 | #ifndef _LIBCPP_MAP | 
 | #define _LIBCPP_MAP | 
 |  | 
 | /* | 
 |  | 
 |     map synopsis | 
 |  | 
 | namespace std | 
 | { | 
 |  | 
 | template <class Key, class T, class Compare = less<Key>, | 
 |           class Allocator = allocator<pair<const Key, T>>> | 
 | class map | 
 | { | 
 | public: | 
 |     // types: | 
 |     typedef Key                                      key_type; | 
 |     typedef T                                        mapped_type; | 
 |     typedef pair<const key_type, mapped_type>        value_type; | 
 |     typedef Compare                                  key_compare; | 
 |     typedef Allocator                                allocator_type; | 
 |     typedef typename allocator_type::reference       reference; | 
 |     typedef typename allocator_type::const_reference const_reference; | 
 |     typedef typename allocator_type::pointer         pointer; | 
 |     typedef typename allocator_type::const_pointer   const_pointer; | 
 |     typedef typename allocator_type::size_type       size_type; | 
 |     typedef typename allocator_type::difference_type difference_type; | 
 |  | 
 |     typedef implementation-defined                   iterator; | 
 |     typedef implementation-defined                   const_iterator; | 
 |     typedef std::reverse_iterator<iterator>          reverse_iterator; | 
 |     typedef std::reverse_iterator<const_iterator>    const_reverse_iterator; | 
 |     typedef unspecified                              node_type;              // C++17 | 
 |     typedef INSERT_RETURN_TYPE<iterator, node_type>  insert_return_type;     // C++17 | 
 |  | 
 |     class value_compare | 
 |     { | 
 |         friend class map; | 
 |     protected: | 
 |         key_compare comp; | 
 |  | 
 |         value_compare(key_compare c); | 
 |     public: | 
 |         typedef bool result_type;  // deprecated in C++17, removed in C++20 | 
 |         typedef value_type first_argument_type;  // deprecated in C++17, removed in C++20 | 
 |         typedef value_type second_argument_type;  // deprecated in C++17, removed in C++20 | 
 |         bool operator()(const value_type& x, const value_type& y) const; | 
 |     }; | 
 |  | 
 |     // construct/copy/destroy: | 
 |     map() | 
 |         noexcept( | 
 |             is_nothrow_default_constructible<allocator_type>::value && | 
 |             is_nothrow_default_constructible<key_compare>::value && | 
 |             is_nothrow_copy_constructible<key_compare>::value); | 
 |     explicit map(const key_compare& comp); | 
 |     map(const key_compare& comp, const allocator_type& a); | 
 |     template <class InputIterator> | 
 |         map(InputIterator first, InputIterator last, | 
 |             const key_compare& comp = key_compare()); | 
 |     template <class InputIterator> | 
 |         map(InputIterator first, InputIterator last, | 
 |             const key_compare& comp, const allocator_type& a); | 
 |     template<container-compatible-range<value_type> R> | 
 |       map(from_range_t, R&& rg, const Compare& comp = Compare(), const Allocator& = Allocator()); // C++23 | 
 |     map(const map& m); | 
 |     map(map&& m) | 
 |         noexcept( | 
 |             is_nothrow_move_constructible<allocator_type>::value && | 
 |             is_nothrow_move_constructible<key_compare>::value); | 
 |     explicit map(const allocator_type& a); | 
 |     map(const map& m, const allocator_type& a); | 
 |     map(map&& m, const allocator_type& a); | 
 |     map(initializer_list<value_type> il, const key_compare& comp = key_compare()); | 
 |     map(initializer_list<value_type> il, const key_compare& comp, const allocator_type& a); | 
 |     template <class InputIterator> | 
 |         map(InputIterator first, InputIterator last, const allocator_type& a) | 
 |             : map(first, last, Compare(), a) {}  // C++14 | 
 |     template<container-compatible-range<value_type> R> | 
 |       map(from_range_t, R&& rg, const Allocator& a)) | 
 |         : map(from_range, std::forward<R>(rg), Compare(), a) { } // C++23 | 
 |     map(initializer_list<value_type> il, const allocator_type& a) | 
 |         : map(il, Compare(), a) {}  // C++14 | 
 |    ~map(); | 
 |  | 
 |     map& operator=(const map& m); | 
 |     map& operator=(map&& m) | 
 |         noexcept( | 
 |             allocator_type::propagate_on_container_move_assignment::value && | 
 |             is_nothrow_move_assignable<allocator_type>::value && | 
 |             is_nothrow_move_assignable<key_compare>::value); | 
 |     map& operator=(initializer_list<value_type> il); | 
 |  | 
 |     // iterators: | 
 |           iterator begin() noexcept; | 
 |     const_iterator begin() const noexcept; | 
 |           iterator end() noexcept; | 
 |     const_iterator end()   const noexcept; | 
 |  | 
 |           reverse_iterator rbegin() noexcept; | 
 |     const_reverse_iterator rbegin() const noexcept; | 
 |           reverse_iterator rend() noexcept; | 
 |     const_reverse_iterator rend()   const noexcept; | 
 |  | 
 |     const_iterator         cbegin()  const noexcept; | 
 |     const_iterator         cend()    const noexcept; | 
 |     const_reverse_iterator crbegin() const noexcept; | 
 |     const_reverse_iterator crend()   const noexcept; | 
 |  | 
 |     // capacity: | 
 |     bool      empty()    const noexcept; | 
 |     size_type size()     const noexcept; | 
 |     size_type max_size() const noexcept; | 
 |  | 
 |     // element access: | 
 |     mapped_type& operator[](const key_type& k); | 
 |     mapped_type& operator[](key_type&& k); | 
 |  | 
 |           mapped_type& at(const key_type& k); | 
 |     const mapped_type& at(const key_type& k) const; | 
 |  | 
 |     // modifiers: | 
 |     template <class... Args> | 
 |         pair<iterator, bool> emplace(Args&&... args); | 
 |     template <class... Args> | 
 |         iterator emplace_hint(const_iterator position, Args&&... args); | 
 |     pair<iterator, bool> insert(const value_type& v); | 
 |     pair<iterator, bool> insert(      value_type&& v);                                // C++17 | 
 |     template <class P> | 
 |         pair<iterator, bool> insert(P&& p); | 
 |     iterator insert(const_iterator position, const value_type& v); | 
 |     iterator insert(const_iterator position,       value_type&& v);                   // C++17 | 
 |     template <class P> | 
 |         iterator insert(const_iterator position, P&& p); | 
 |     template <class InputIterator> | 
 |         void insert(InputIterator first, InputIterator last); | 
 |     template<container-compatible-range<value_type> R> | 
 |       void insert_range(R&& rg);                                                      // C++23 | 
 |     void insert(initializer_list<value_type> il); | 
 |  | 
 |     node_type extract(const_iterator position);                                       // C++17 | 
 |     node_type extract(const key_type& x);                                             // C++17 | 
 |     insert_return_type insert(node_type&& nh);                                        // C++17 | 
 |     iterator insert(const_iterator hint, node_type&& nh);                             // C++17 | 
 |  | 
 |     template <class... Args> | 
 |         pair<iterator, bool> try_emplace(const key_type& k, Args&&... args);          // C++17 | 
 |     template <class... Args> | 
 |         pair<iterator, bool> try_emplace(key_type&& k, Args&&... args);               // C++17 | 
 |     template <class... Args> | 
 |         iterator try_emplace(const_iterator hint, const key_type& k, Args&&... args); // C++17 | 
 |     template <class... Args> | 
 |         iterator try_emplace(const_iterator hint, key_type&& k, Args&&... args);      // C++17 | 
 |     template <class M> | 
 |         pair<iterator, bool> insert_or_assign(const key_type& k, M&& obj);            // C++17 | 
 |     template <class M> | 
 |         pair<iterator, bool> insert_or_assign(key_type&& k, M&& obj);                 // C++17 | 
 |     template <class M> | 
 |         iterator insert_or_assign(const_iterator hint, const key_type& k, M&& obj);   // C++17 | 
 |     template <class M> | 
 |         iterator insert_or_assign(const_iterator hint, key_type&& k, M&& obj);        // C++17 | 
 |  | 
 |     iterator  erase(const_iterator position); | 
 |     iterator  erase(iterator position); // C++14 | 
 |     size_type erase(const key_type& k); | 
 |     iterator  erase(const_iterator first, const_iterator last); | 
 |     void clear() noexcept; | 
 |  | 
 |     template<class C2> | 
 |       void merge(map<Key, T, C2, Allocator>& source);         // C++17 | 
 |     template<class C2> | 
 |       void merge(map<Key, T, C2, Allocator>&& source);        // C++17 | 
 |     template<class C2> | 
 |       void merge(multimap<Key, T, C2, Allocator>& source);    // C++17 | 
 |     template<class C2> | 
 |       void merge(multimap<Key, T, C2, Allocator>&& source);   // C++17 | 
 |  | 
 |     void swap(map& m) | 
 |         noexcept(allocator_traits<allocator_type>::is_always_equal::value && | 
 |             is_nothrow_swappable<key_compare>::value); // C++17 | 
 |  | 
 |     // observers: | 
 |     allocator_type get_allocator() const noexcept; | 
 |     key_compare    key_comp()      const; | 
 |     value_compare  value_comp()    const; | 
 |  | 
 |     // map operations: | 
 |           iterator find(const key_type& k); | 
 |     const_iterator find(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator find(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator find(const K& x) const;  // C++14 | 
 |  | 
 |     template<typename K> | 
 |       size_type count(const K& x) const;        // C++14 | 
 |     size_type      count(const key_type& k) const; | 
 |  | 
 |     bool           contains(const key_type& x) const;  // C++20 | 
 |     template<class K> bool contains(const K& x) const; // C++20 | 
 |  | 
 |           iterator lower_bound(const key_type& k); | 
 |     const_iterator lower_bound(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator lower_bound(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator lower_bound(const K& x) const;  // C++14 | 
 |  | 
 |           iterator upper_bound(const key_type& k); | 
 |     const_iterator upper_bound(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator upper_bound(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator upper_bound(const K& x) const;  // C++14 | 
 |  | 
 |     pair<iterator,iterator>             equal_range(const key_type& k); | 
 |     pair<const_iterator,const_iterator> equal_range(const key_type& k) const; | 
 |     template<typename K> | 
 |         pair<iterator,iterator>             equal_range(const K& x);        // C++14 | 
 |     template<typename K> | 
 |         pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14 | 
 | }; | 
 |  | 
 | template <class InputIterator, | 
 |       class Compare = less<iter_key_t<InputIterator>>, | 
 |       class Allocator = allocator<iter_to_alloc_t<InputIterator>>> | 
 | map(InputIterator, InputIterator, Compare = Compare(), Allocator = Allocator()) | 
 |   -> map<iter_key_t<InputIterator>, iter_val_t<InputIterator>, Compare, Allocator>; // C++17 | 
 |  | 
 | template<ranges::input_range R, class Compare = less<range-key-type<R>, | 
 |          class Allocator = allocator<range-to-alloc-type<R>>> | 
 |   map(from_range_t, R&&, Compare = Compare(), Allocator = Allocator()) | 
 |     -> map<range-key-type<R>, range-mapped-type<R>, Compare, Allocator>; // C++23 | 
 |  | 
 | template<class Key, class T, class Compare = less<Key>, | 
 |     class Allocator = allocator<pair<const Key, T>>> | 
 | map(initializer_list<pair<const Key, T>>, Compare = Compare(), Allocator = Allocator()) | 
 |   -> map<Key, T, Compare, Allocator>; // C++17 | 
 |  | 
 | template <class InputIterator, class Allocator> | 
 | map(InputIterator, InputIterator, Allocator) | 
 |   -> map<iter_key_t<InputIterator>, iter_val_t<InputIterator>, less<iter_key_t<InputIterator>>, | 
 |     Allocator>; // C++17 | 
 |  | 
 | template<ranges::input_range R, class Allocator> | 
 |   map(from_range_t, R&&, Allocator) | 
 |     -> map<range-key-type<R>, range-mapped-type<R>, less<range-key-type<R>>, Allocator>; // C++23 | 
 |  | 
 | template<class Key, class T, class Allocator> | 
 | map(initializer_list<pair<const Key, T>>, Allocator) -> map<Key, T, less<Key>, Allocator>; // C++17 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator==(const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y); | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator< (const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator!=(const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator> (const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator>=(const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator<=(const map<Key, T, Compare, Allocator>& x, | 
 |            const map<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template<class Key, class T, class Compare, class Allocator> | 
 |   synth-three-way-result<pair<const Key, T>> | 
 |     operator<=>(const map<Key, T, Compare, Allocator>& x, | 
 |                 const map<Key, T, Compare, Allocator>& y); // since C++20 | 
 |  | 
 | // specialized algorithms: | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | void | 
 | swap(map<Key, T, Compare, Allocator>& x, map<Key, T, Compare, Allocator>& y) | 
 |     noexcept(noexcept(x.swap(y))); | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator, class Predicate> | 
 | typename map<Key, T, Compare, Allocator>::size_type | 
 | erase_if(map<Key, T, Compare, Allocator>& c, Predicate pred);  // C++20 | 
 |  | 
 |  | 
 | template <class Key, class T, class Compare = less<Key>, | 
 |           class Allocator = allocator<pair<const Key, T>>> | 
 | class multimap | 
 | { | 
 | public: | 
 |     // types: | 
 |     typedef Key                                      key_type; | 
 |     typedef T                                        mapped_type; | 
 |     typedef pair<const key_type,mapped_type>         value_type; | 
 |     typedef Compare                                  key_compare; | 
 |     typedef Allocator                                allocator_type; | 
 |     typedef typename allocator_type::reference       reference; | 
 |     typedef typename allocator_type::const_reference const_reference; | 
 |     typedef typename allocator_type::size_type       size_type; | 
 |     typedef typename allocator_type::difference_type difference_type; | 
 |     typedef typename allocator_type::pointer         pointer; | 
 |     typedef typename allocator_type::const_pointer   const_pointer; | 
 |  | 
 |     typedef implementation-defined                   iterator; | 
 |     typedef implementation-defined                   const_iterator; | 
 |     typedef std::reverse_iterator<iterator>          reverse_iterator; | 
 |     typedef std::reverse_iterator<const_iterator>    const_reverse_iterator; | 
 |     typedef unspecified                              node_type;              // C++17 | 
 |  | 
 |     class value_compare | 
 |     { | 
 |         friend class multimap; | 
 |     protected: | 
 |         key_compare comp; | 
 |         value_compare(key_compare c); | 
 |     public: | 
 |         typedef bool result_type;  // deprecated in C++17, removed in C++20 | 
 |         typedef value_type first_argument_type;  // deprecated in C++17, removed in C++20 | 
 |         typedef value_type second_argument_type;  // deprecated in C++17, removed in C++20 | 
 |         bool operator()(const value_type& x, const value_type& y) const; | 
 |     }; | 
 |  | 
 |     // construct/copy/destroy: | 
 |     multimap() | 
 |         noexcept( | 
 |             is_nothrow_default_constructible<allocator_type>::value && | 
 |             is_nothrow_default_constructible<key_compare>::value && | 
 |             is_nothrow_copy_constructible<key_compare>::value); | 
 |     explicit multimap(const key_compare& comp); | 
 |     multimap(const key_compare& comp, const allocator_type& a); | 
 |     template <class InputIterator> | 
 |         multimap(InputIterator first, InputIterator last, const key_compare& comp); | 
 |     template <class InputIterator> | 
 |         multimap(InputIterator first, InputIterator last, const key_compare& comp, | 
 |                  const allocator_type& a); | 
 |     template<container-compatible-range<value_type> R> | 
 |       multimap(from_range_t, R&& rg, | 
 |                const Compare& comp = Compare(), const Allocator& = Allocator()); // C++23 | 
 |     multimap(const multimap& m); | 
 |     multimap(multimap&& m) | 
 |         noexcept( | 
 |             is_nothrow_move_constructible<allocator_type>::value && | 
 |             is_nothrow_move_constructible<key_compare>::value); | 
 |     explicit multimap(const allocator_type& a); | 
 |     multimap(const multimap& m, const allocator_type& a); | 
 |     multimap(multimap&& m, const allocator_type& a); | 
 |     multimap(initializer_list<value_type> il, const key_compare& comp = key_compare()); | 
 |     multimap(initializer_list<value_type> il, const key_compare& comp, | 
 |              const allocator_type& a); | 
 |     template <class InputIterator> | 
 |         multimap(InputIterator first, InputIterator last, const allocator_type& a) | 
 |             : multimap(first, last, Compare(), a) {} // C++14 | 
 |     template<container-compatible-range<value_type> R> | 
 |       multimap(from_range_t, R&& rg, const Allocator& a)) | 
 |         : multimap(from_range, std::forward<R>(rg), Compare(), a) { } // C++23 | 
 |     multimap(initializer_list<value_type> il, const allocator_type& a) | 
 |         : multimap(il, Compare(), a) {} // C++14 | 
 |     ~multimap(); | 
 |  | 
 |     multimap& operator=(const multimap& m); | 
 |     multimap& operator=(multimap&& m) | 
 |         noexcept( | 
 |             allocator_type::propagate_on_container_move_assignment::value && | 
 |             is_nothrow_move_assignable<allocator_type>::value && | 
 |             is_nothrow_move_assignable<key_compare>::value); | 
 |     multimap& operator=(initializer_list<value_type> il); | 
 |  | 
 |     // iterators: | 
 |           iterator begin() noexcept; | 
 |     const_iterator begin() const noexcept; | 
 |           iterator end() noexcept; | 
 |     const_iterator end()   const noexcept; | 
 |  | 
 |           reverse_iterator rbegin() noexcept; | 
 |     const_reverse_iterator rbegin() const noexcept; | 
 |           reverse_iterator rend() noexcept; | 
 |     const_reverse_iterator rend()   const noexcept; | 
 |  | 
 |     const_iterator         cbegin()  const noexcept; | 
 |     const_iterator         cend()    const noexcept; | 
 |     const_reverse_iterator crbegin() const noexcept; | 
 |     const_reverse_iterator crend()   const noexcept; | 
 |  | 
 |     // capacity: | 
 |     bool      empty()    const noexcept; | 
 |     size_type size()     const noexcept; | 
 |     size_type max_size() const noexcept; | 
 |  | 
 |     // modifiers: | 
 |     template <class... Args> | 
 |         iterator emplace(Args&&... args); | 
 |     template <class... Args> | 
 |         iterator emplace_hint(const_iterator position, Args&&... args); | 
 |     iterator insert(const value_type& v); | 
 |     iterator insert(      value_type&& v);                                            // C++17 | 
 |     template <class P> | 
 |         iterator insert(P&& p); | 
 |     iterator insert(const_iterator position, const value_type& v); | 
 |     iterator insert(const_iterator position,       value_type&& v);                   // C++17 | 
 |     template <class P> | 
 |         iterator insert(const_iterator position, P&& p); | 
 |     template <class InputIterator> | 
 |         void insert(InputIterator first, InputIterator last); | 
 |     template<container-compatible-range<value_type> R> | 
 |       void insert_range(R&& rg);                                                      // C++23 | 
 |     void insert(initializer_list<value_type> il); | 
 |  | 
 |     node_type extract(const_iterator position);                                       // C++17 | 
 |     node_type extract(const key_type& x);                                             // C++17 | 
 |     iterator insert(node_type&& nh);                                                  // C++17 | 
 |     iterator insert(const_iterator hint, node_type&& nh);                             // C++17 | 
 |  | 
 |     iterator  erase(const_iterator position); | 
 |     iterator  erase(iterator position); // C++14 | 
 |     size_type erase(const key_type& k); | 
 |     iterator  erase(const_iterator first, const_iterator last); | 
 |     void clear() noexcept; | 
 |  | 
 |     template<class C2> | 
 |       void merge(multimap<Key, T, C2, Allocator>& source);    // C++17 | 
 |     template<class C2> | 
 |       void merge(multimap<Key, T, C2, Allocator>&& source);   // C++17 | 
 |     template<class C2> | 
 |       void merge(map<Key, T, C2, Allocator>& source);         // C++17 | 
 |     template<class C2> | 
 |       void merge(map<Key, T, C2, Allocator>&& source);        // C++17 | 
 |  | 
 |     void swap(multimap& m) | 
 |         noexcept(allocator_traits<allocator_type>::is_always_equal::value && | 
 |             is_nothrow_swappable<key_compare>::value); // C++17 | 
 |  | 
 |     // observers: | 
 |     allocator_type get_allocator() const noexcept; | 
 |     key_compare    key_comp()      const; | 
 |     value_compare  value_comp()    const; | 
 |  | 
 |     // map operations: | 
 |           iterator find(const key_type& k); | 
 |     const_iterator find(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator find(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator find(const K& x) const;  // C++14 | 
 |  | 
 |     template<typename K> | 
 |       size_type count(const K& x) const;        // C++14 | 
 |     size_type      count(const key_type& k) const; | 
 |  | 
 |     bool           contains(const key_type& x) const;  // C++20 | 
 |     template<class K> bool contains(const K& x) const; // C++20 | 
 |  | 
 |           iterator lower_bound(const key_type& k); | 
 |     const_iterator lower_bound(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator lower_bound(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator lower_bound(const K& x) const;  // C++14 | 
 |  | 
 |           iterator upper_bound(const key_type& k); | 
 |     const_iterator upper_bound(const key_type& k) const; | 
 |     template<typename K> | 
 |         iterator upper_bound(const K& x);              // C++14 | 
 |     template<typename K> | 
 |         const_iterator upper_bound(const K& x) const;  // C++14 | 
 |  | 
 |     pair<iterator,iterator>             equal_range(const key_type& k); | 
 |     pair<const_iterator,const_iterator> equal_range(const key_type& k) const; | 
 |     template<typename K> | 
 |         pair<iterator,iterator>             equal_range(const K& x);        // C++14 | 
 |     template<typename K> | 
 |         pair<const_iterator,const_iterator> equal_range(const K& x) const;  // C++14 | 
 | }; | 
 |  | 
 | template <class InputIterator, | 
 |       class Compare = less<iter_key_t<InputIterator>>, | 
 |       class Allocator = allocator<iter_to_alloc_t<InputIterator>>> | 
 | multimap(InputIterator, InputIterator, Compare = Compare(), Allocator = Allocator()) | 
 |   -> multimap<iter_key_t<InputIterator>, iter_val_t<InputIterator>, Compare, Allocator>; // C++17 | 
 |  | 
 | template<ranges::input_range R, class Compare = less<range-key-type<R>>, | 
 |           class Allocator = allocator<range-to-alloc-type<R>>> | 
 |   multimap(from_range_t, R&&, Compare = Compare(), Allocator = Allocator()) | 
 |     -> multimap<range-key-type<R>, range-mapped-type<R>, Compare, Allocator>; // C++23 | 
 |  | 
 | template<class Key, class T, class Compare = less<Key>, | 
 |     class Allocator = allocator<pair<const Key, T>>> | 
 | multimap(initializer_list<pair<const Key, T>>, Compare = Compare(), Allocator = Allocator()) | 
 |   -> multimap<Key, T, Compare, Allocator>; // C++17 | 
 |  | 
 | template <class InputIterator, class Allocator> | 
 | multimap(InputIterator, InputIterator, Allocator) | 
 |   -> multimap<iter_key_t<InputIterator>, iter_val_t<InputIterator>, | 
 |     less<iter_key_t<InputIterator>>, Allocator>; // C++17 | 
 |  | 
 | template<ranges::input_range R, class Allocator> | 
 |   multimap(from_range_t, R&&, Allocator) | 
 |     -> multimap<range-key-type<R>, range-mapped-type<R>, less<range-key-type<R>>, Allocator>; // C++23 | 
 |  | 
 | template<class Key, class T, class Allocator> | 
 | multimap(initializer_list<pair<const Key, T>>, Allocator) | 
 |   -> multimap<Key, T, less<Key>, Allocator>; // C++17 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator==(const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y); | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator< (const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator!=(const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator> (const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator>=(const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | bool | 
 | operator<=(const multimap<Key, T, Compare, Allocator>& x, | 
 |            const multimap<Key, T, Compare, Allocator>& y);      // removed in C++20 | 
 |  | 
 | template<class Key, class T, class Compare, class Allocator> | 
 |   synth-three-way-result<pair<const Key, T>> | 
 |     operator<=>(const multimap<Key, T, Compare, Allocator>& x, | 
 |                 const multimap<Key, T, Compare, Allocator>& y); // since c++20 | 
 |  | 
 | // specialized algorithms: | 
 | template <class Key, class T, class Compare, class Allocator> | 
 | void | 
 | swap(multimap<Key, T, Compare, Allocator>& x, | 
 |      multimap<Key, T, Compare, Allocator>& y) | 
 |     noexcept(noexcept(x.swap(y))); | 
 |  | 
 | template <class Key, class T, class Compare, class Allocator, class Predicate> | 
 | typename multimap<Key, T, Compare, Allocator>::size_type | 
 | erase_if(multimap<Key, T, Compare, Allocator>& c, Predicate pred);  // C++20 | 
 |  | 
 | }  // std | 
 |  | 
 | */ | 
 |  | 
 | #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) | 
 | #  include <__cxx03/map> | 
 | #else | 
 | #  include <__algorithm/equal.h> | 
 | #  include <__algorithm/lexicographical_compare.h> | 
 | #  include <__algorithm/lexicographical_compare_three_way.h> | 
 | #  include <__assert> | 
 | #  include <__config> | 
 | #  include <__functional/binary_function.h> | 
 | #  include <__functional/is_transparent.h> | 
 | #  include <__functional/operations.h> | 
 | #  include <__fwd/map.h> | 
 | #  include <__iterator/erase_if_container.h> | 
 | #  include <__iterator/iterator_traits.h> | 
 | #  include <__iterator/ranges_iterator_traits.h> | 
 | #  include <__iterator/reverse_iterator.h> | 
 | #  include <__memory/addressof.h> | 
 | #  include <__memory/allocator.h> | 
 | #  include <__memory/allocator_traits.h> | 
 | #  include <__memory/pointer_traits.h> | 
 | #  include <__memory/unique_ptr.h> | 
 | #  include <__memory_resource/polymorphic_allocator.h> | 
 | #  include <__new/launder.h> | 
 | #  include <__node_handle> | 
 | #  include <__ranges/concepts.h> | 
 | #  include <__ranges/container_compatible_range.h> | 
 | #  include <__ranges/from_range.h> | 
 | #  include <__tree> | 
 | #  include <__type_traits/container_traits.h> | 
 | #  include <__type_traits/is_allocator.h> | 
 | #  include <__type_traits/remove_const.h> | 
 | #  include <__type_traits/type_identity.h> | 
 | #  include <__utility/forward.h> | 
 | #  include <__utility/pair.h> | 
 | #  include <__utility/piecewise_construct.h> | 
 | #  include <__utility/swap.h> | 
 | #  include <stdexcept> | 
 | #  include <tuple> | 
 | #  include <version> | 
 |  | 
 | // standard-mandated includes | 
 |  | 
 | // [iterator.range] | 
 | #  include <__iterator/access.h> | 
 | #  include <__iterator/data.h> | 
 | #  include <__iterator/empty.h> | 
 | #  include <__iterator/reverse_access.h> | 
 | #  include <__iterator/size.h> | 
 |  | 
 | // [associative.map.syn] | 
 | #  include <compare> | 
 | #  include <initializer_list> | 
 |  | 
 | #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | 
 | #    pragma GCC system_header | 
 | #  endif | 
 |  | 
 | _LIBCPP_PUSH_MACROS | 
 | #  include <__undef_macros> | 
 |  | 
 | _LIBCPP_BEGIN_NAMESPACE_STD | 
 |  | 
 | template <class _Key, | 
 |           class _CP, | 
 |           class _Compare, | 
 |           bool = is_empty<_Compare>::value && !__libcpp_is_final<_Compare>::value> | 
 | class __map_value_compare : private _Compare { | 
 | public: | 
 |   _LIBCPP_HIDE_FROM_ABI __map_value_compare() _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value) | 
 |       : _Compare() {} | 
 |   _LIBCPP_HIDE_FROM_ABI __map_value_compare(_Compare __c) _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value) | 
 |       : _Compare(__c) {} | 
 |   _LIBCPP_HIDE_FROM_ABI const _Compare& key_comp() const _NOEXCEPT { return *this; } | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _CP& __y) const { | 
 |     return static_cast<const _Compare&>(*this)(__x.__get_value().first, __y.__get_value().first); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _Key& __y) const { | 
 |     return static_cast<const _Compare&>(*this)(__x.__get_value().first, __y); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _Key& __x, const _CP& __y) const { | 
 |     return static_cast<const _Compare&>(*this)(__x, __y.__get_value().first); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI void swap(__map_value_compare& __y) _NOEXCEPT_(__is_nothrow_swappable_v<_Compare>) { | 
 |     using std::swap; | 
 |     swap(static_cast<_Compare&>(*this), static_cast<_Compare&>(__y)); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2> | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _K2& __x, const _CP& __y) const { | 
 |     return static_cast<const _Compare&>(*this)(__x, __y.__get_value().first); | 
 |   } | 
 |  | 
 |   template <typename _K2> | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _K2& __y) const { | 
 |     return static_cast<const _Compare&>(*this)(__x.__get_value().first, __y); | 
 |   } | 
 | #  endif | 
 | }; | 
 |  | 
 | template <class _Key, class _CP, class _Compare> | 
 | class __map_value_compare<_Key, _CP, _Compare, false> { | 
 |   _Compare __comp_; | 
 |  | 
 | public: | 
 |   _LIBCPP_HIDE_FROM_ABI __map_value_compare() _NOEXCEPT_(is_nothrow_default_constructible<_Compare>::value) | 
 |       : __comp_() {} | 
 |   _LIBCPP_HIDE_FROM_ABI __map_value_compare(_Compare __c) _NOEXCEPT_(is_nothrow_copy_constructible<_Compare>::value) | 
 |       : __comp_(__c) {} | 
 |   _LIBCPP_HIDE_FROM_ABI const _Compare& key_comp() const _NOEXCEPT { return __comp_; } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _CP& __y) const { | 
 |     return __comp_(__x.__get_value().first, __y.__get_value().first); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _Key& __y) const { | 
 |     return __comp_(__x.__get_value().first, __y); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _Key& __x, const _CP& __y) const { | 
 |     return __comp_(__x, __y.__get_value().first); | 
 |   } | 
 |   void swap(__map_value_compare& __y) _NOEXCEPT_(__is_nothrow_swappable_v<_Compare>) { | 
 |     using std::swap; | 
 |     swap(__comp_, __y.__comp_); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2> | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _K2& __x, const _CP& __y) const { | 
 |     return __comp_(__x, __y.__get_value().first); | 
 |   } | 
 |  | 
 |   template <typename _K2> | 
 |   _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _K2& __y) const { | 
 |     return __comp_(__x.__get_value().first, __y); | 
 |   } | 
 | #  endif | 
 | }; | 
 |  | 
 | template <class _Key, class _CP, class _Compare, bool __b> | 
 | inline _LIBCPP_HIDE_FROM_ABI void | 
 | swap(__map_value_compare<_Key, _CP, _Compare, __b>& __x, __map_value_compare<_Key, _CP, _Compare, __b>& __y) | 
 |     _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y))) { | 
 |   __x.swap(__y); | 
 | } | 
 |  | 
 | template <class _Allocator> | 
 | class __map_node_destructor { | 
 |   typedef _Allocator allocator_type; | 
 |   typedef allocator_traits<allocator_type> __alloc_traits; | 
 |  | 
 | public: | 
 |   typedef typename __alloc_traits::pointer pointer; | 
 |  | 
 | private: | 
 |   allocator_type& __na_; | 
 |  | 
 | public: | 
 |   bool __first_constructed; | 
 |   bool __second_constructed; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit __map_node_destructor(allocator_type& __na) _NOEXCEPT | 
 |       : __na_(__na), | 
 |         __first_constructed(false), | 
 |         __second_constructed(false) {} | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |   _LIBCPP_HIDE_FROM_ABI __map_node_destructor(__tree_node_destructor<allocator_type>&& __x) _NOEXCEPT | 
 |       : __na_(__x.__na_), | 
 |         __first_constructed(__x.__value_constructed), | 
 |         __second_constructed(__x.__value_constructed) { | 
 |     __x.__value_constructed = false; | 
 |   } | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 |   __map_node_destructor& operator=(const __map_node_destructor&) = delete; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void operator()(pointer __p) _NOEXCEPT { | 
 |     if (__second_constructed) | 
 |       __alloc_traits::destroy(__na_, std::addressof(__p->__value_.__get_value().second)); | 
 |     if (__first_constructed) | 
 |       __alloc_traits::destroy(__na_, std::addressof(__p->__value_.__get_value().first)); | 
 |     if (__p) | 
 |       __alloc_traits::deallocate(__na_, __p, 1); | 
 |   } | 
 | }; | 
 |  | 
 | template <class _TreeIterator> | 
 | class __map_const_iterator; | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _Key, class _Tp> | 
 | struct _LIBCPP_STANDALONE_DEBUG __value_type { | 
 |   typedef _Key key_type; | 
 |   typedef _Tp mapped_type; | 
 |   typedef pair<const key_type, mapped_type> value_type; | 
 |   typedef pair<key_type&, mapped_type&> __nc_ref_pair_type; | 
 |   typedef pair<key_type&&, mapped_type&&> __nc_rref_pair_type; | 
 |  | 
 | private: | 
 |   value_type __cc_; | 
 |  | 
 | public: | 
 |   _LIBCPP_HIDE_FROM_ABI value_type& __get_value() { | 
 | #    if _LIBCPP_STD_VER >= 17 | 
 |     return *std::launder(std::addressof(__cc_)); | 
 | #    else | 
 |     return __cc_; | 
 | #    endif | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI const value_type& __get_value() const { | 
 | #    if _LIBCPP_STD_VER >= 17 | 
 |     return *std::launder(std::addressof(__cc_)); | 
 | #    else | 
 |     return __cc_; | 
 | #    endif | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __nc_ref_pair_type __ref() { | 
 |     value_type& __v = __get_value(); | 
 |     return __nc_ref_pair_type(const_cast<key_type&>(__v.first), __v.second); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __nc_rref_pair_type __move() { | 
 |     value_type& __v = __get_value(); | 
 |     return __nc_rref_pair_type(std::move(const_cast<key_type&>(__v.first)), std::move(__v.second)); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __value_type& operator=(const __value_type& __v) { | 
 |     __ref() = __v.__get_value(); | 
 |     return *this; | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __value_type& operator=(__value_type&& __v) { | 
 |     __ref() = __v.__move(); | 
 |     return *this; | 
 |   } | 
 |  | 
 |   template <class _ValueTp, __enable_if_t<__is_same_uncvref<_ValueTp, value_type>::value, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI __value_type& operator=(_ValueTp&& __v) { | 
 |     __ref() = std::forward<_ValueTp>(__v); | 
 |     return *this; | 
 |   } | 
 |  | 
 |   __value_type()                    = delete; | 
 |   ~__value_type()                   = delete; | 
 |   __value_type(const __value_type&) = delete; | 
 |   __value_type(__value_type&&)      = delete; | 
 | }; | 
 |  | 
 | #  else | 
 |  | 
 | template <class _Key, class _Tp> | 
 | struct __value_type { | 
 |   typedef _Key key_type; | 
 |   typedef _Tp mapped_type; | 
 |   typedef pair<const key_type, mapped_type> value_type; | 
 |  | 
 | private: | 
 |   value_type __cc_; | 
 |  | 
 | public: | 
 |   _LIBCPP_HIDE_FROM_ABI value_type& __get_value() { return __cc_; } | 
 |   _LIBCPP_HIDE_FROM_ABI const value_type& __get_value() const { return __cc_; } | 
 |  | 
 |   __value_type()                               = delete; | 
 |   __value_type(__value_type const&)            = delete; | 
 |   __value_type& operator=(__value_type const&) = delete; | 
 |   ~__value_type()                              = delete; | 
 | }; | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _Tp> | 
 | struct __extract_key_value_types; | 
 |  | 
 | template <class _Key, class _Tp> | 
 | struct __extract_key_value_types<__value_type<_Key, _Tp> > { | 
 |   typedef _Key const __key_type; | 
 |   typedef _Tp __mapped_type; | 
 | }; | 
 |  | 
 | template <class _TreeIterator> | 
 | class __map_iterator { | 
 |   typedef typename _TreeIterator::_NodeTypes _NodeTypes; | 
 |   typedef typename _TreeIterator::__pointer_traits __pointer_traits; | 
 |  | 
 |   _TreeIterator __i_; | 
 |  | 
 | public: | 
 |   typedef bidirectional_iterator_tag iterator_category; | 
 |   typedef typename _NodeTypes::__map_value_type value_type; | 
 |   typedef typename _TreeIterator::difference_type difference_type; | 
 |   typedef value_type& reference; | 
 |   typedef typename _NodeTypes::__map_value_type_pointer pointer; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator() _NOEXCEPT {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI reference operator*() const { return __i_->__get_value(); } | 
 |   _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return pointer_traits<pointer>::pointer_to(__i_->__get_value()); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator& operator++() { | 
 |     ++__i_; | 
 |     return *this; | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator operator++(int) { | 
 |     __map_iterator __t(*this); | 
 |     ++(*this); | 
 |     return __t; | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator& operator--() { | 
 |     --__i_; | 
 |     return *this; | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI __map_iterator operator--(int) { | 
 |     __map_iterator __t(*this); | 
 |     --(*this); | 
 |     return __t; | 
 |   } | 
 |  | 
 |   friend _LIBCPP_HIDE_FROM_ABI bool operator==(const __map_iterator& __x, const __map_iterator& __y) { | 
 |     return __x.__i_ == __y.__i_; | 
 |   } | 
 |   friend _LIBCPP_HIDE_FROM_ABI bool operator!=(const __map_iterator& __x, const __map_iterator& __y) { | 
 |     return __x.__i_ != __y.__i_; | 
 |   } | 
 |  | 
 |   template <class, class, class, class> | 
 |   friend class map; | 
 |   template <class, class, class, class> | 
 |   friend class multimap; | 
 |   template <class> | 
 |   friend class __map_const_iterator; | 
 | }; | 
 |  | 
 | template <class _TreeIterator> | 
 | class __map_const_iterator { | 
 |   typedef typename _TreeIterator::_NodeTypes _NodeTypes; | 
 |   typedef typename _TreeIterator::__pointer_traits __pointer_traits; | 
 |  | 
 |   _TreeIterator __i_; | 
 |  | 
 | public: | 
 |   typedef bidirectional_iterator_tag iterator_category; | 
 |   typedef typename _NodeTypes::__map_value_type value_type; | 
 |   typedef typename _TreeIterator::difference_type difference_type; | 
 |   typedef const value_type& reference; | 
 |   typedef typename _NodeTypes::__const_map_value_type_pointer pointer; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator() _NOEXCEPT {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator(_TreeIterator __i) _NOEXCEPT : __i_(__i) {} | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   __map_const_iterator(__map_iterator< typename _TreeIterator::__non_const_iterator> __i) _NOEXCEPT : __i_(__i.__i_) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI reference operator*() const { return __i_->__get_value(); } | 
 |   _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return pointer_traits<pointer>::pointer_to(__i_->__get_value()); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator& operator++() { | 
 |     ++__i_; | 
 |     return *this; | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator operator++(int) { | 
 |     __map_const_iterator __t(*this); | 
 |     ++(*this); | 
 |     return __t; | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator& operator--() { | 
 |     --__i_; | 
 |     return *this; | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI __map_const_iterator operator--(int) { | 
 |     __map_const_iterator __t(*this); | 
 |     --(*this); | 
 |     return __t; | 
 |   } | 
 |  | 
 |   friend _LIBCPP_HIDE_FROM_ABI bool operator==(const __map_const_iterator& __x, const __map_const_iterator& __y) { | 
 |     return __x.__i_ == __y.__i_; | 
 |   } | 
 |   friend _LIBCPP_HIDE_FROM_ABI bool operator!=(const __map_const_iterator& __x, const __map_const_iterator& __y) { | 
 |     return __x.__i_ != __y.__i_; | 
 |   } | 
 |  | 
 |   template <class, class, class, class> | 
 |   friend class map; | 
 |   template <class, class, class, class> | 
 |   friend class multimap; | 
 |   template <class, class, class> | 
 |   friend class __tree_const_iterator; | 
 | }; | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | class map { | 
 | public: | 
 |   // types: | 
 |   typedef _Key key_type; | 
 |   typedef _Tp mapped_type; | 
 |   typedef pair<const key_type, mapped_type> value_type; | 
 |   typedef __type_identity_t<_Compare> key_compare; | 
 |   typedef __type_identity_t<_Allocator> allocator_type; | 
 |   typedef value_type& reference; | 
 |   typedef const value_type& const_reference; | 
 |  | 
 |   static_assert(is_same<typename allocator_type::value_type, value_type>::value, | 
 |                 "Allocator::value_type must be same type as value_type"); | 
 |  | 
 |   class value_compare : public __binary_function<value_type, value_type, bool> { | 
 |     friend class map; | 
 |  | 
 |   protected: | 
 |     key_compare comp; | 
 |  | 
 |     _LIBCPP_HIDE_FROM_ABI value_compare(key_compare __c) : comp(__c) {} | 
 |  | 
 |   public: | 
 |     _LIBCPP_HIDE_FROM_ABI bool operator()(const value_type& __x, const value_type& __y) const { | 
 |       return comp(__x.first, __y.first); | 
 |     } | 
 |   }; | 
 |  | 
 | private: | 
 |   typedef std::__value_type<key_type, mapped_type> __value_type; | 
 |   typedef __map_value_compare<key_type, __value_type, key_compare> __vc; | 
 |   typedef __rebind_alloc<allocator_traits<allocator_type>, __value_type> __allocator_type; | 
 |   typedef __tree<__value_type, __vc, __allocator_type> __base; | 
 |   typedef typename __base::__node_traits __node_traits; | 
 |   typedef allocator_traits<allocator_type> __alloc_traits; | 
 |  | 
 |   static_assert(__check_valid_allocator<allocator_type>::value, ""); | 
 |  | 
 |   __base __tree_; | 
 |  | 
 | public: | 
 |   typedef typename __alloc_traits::pointer pointer; | 
 |   typedef typename __alloc_traits::const_pointer const_pointer; | 
 |   typedef typename __alloc_traits::size_type size_type; | 
 |   typedef typename __alloc_traits::difference_type difference_type; | 
 |   typedef __map_iterator<typename __base::iterator> iterator; | 
 |   typedef __map_const_iterator<typename __base::const_iterator> const_iterator; | 
 |   typedef std::reverse_iterator<iterator> reverse_iterator; | 
 |   typedef std::reverse_iterator<const_iterator> const_reverse_iterator; | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 |   typedef __map_node_handle<typename __base::__node, allocator_type> node_type; | 
 |   typedef __insert_return_type<iterator, node_type> insert_return_type; | 
 | #  endif | 
 |  | 
 |   template <class _Key2, class _Value2, class _Comp2, class _Alloc2> | 
 |   friend class map; | 
 |   template <class _Key2, class _Value2, class _Comp2, class _Alloc2> | 
 |   friend class multimap; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map() _NOEXCEPT_( | 
 |       is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_default_constructible<key_compare>::value&& | 
 |           is_nothrow_copy_constructible<key_compare>::value) | 
 |       : __tree_(__vc(key_compare())) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit map(const key_compare& __comp) _NOEXCEPT_( | 
 |       is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_copy_constructible<key_compare>::value) | 
 |       : __tree_(__vc(__comp)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit map(const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {} | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI map(_InputIterator __f, _InputIterator __l, const key_compare& __comp = key_compare()) | 
 |       : __tree_(__vc(__comp)) { | 
 |     insert(__f, __l); | 
 |   } | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   map(_InputIterator __f, _InputIterator __l, const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert(__f, __l); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   map(from_range_t, | 
 |       _Range&& __range, | 
 |       const key_compare& __comp = key_compare(), | 
 |       const allocator_type& __a = allocator_type()) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert_range(std::forward<_Range>(__range)); | 
 |   } | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI map(_InputIterator __f, _InputIterator __l, const allocator_type& __a) | 
 |       : map(__f, __l, key_compare(), __a) {} | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI map(from_range_t, _Range&& __range, const allocator_type& __a) | 
 |       : map(from_range, std::forward<_Range>(__range), key_compare(), __a) {} | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(const map& __m) : __tree_(__m.__tree_) { insert(__m.begin(), __m.end()); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map& operator=(const map& __m) { | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |     __tree_ = __m.__tree_; | 
 | #  else | 
 |     if (this != std::addressof(__m)) { | 
 |       __tree_.clear(); | 
 |       __tree_.value_comp() = __m.__tree_.value_comp(); | 
 |       __tree_.__copy_assign_alloc(__m.__tree_); | 
 |       insert(__m.begin(), __m.end()); | 
 |     } | 
 | #  endif | 
 |     return *this; | 
 |   } | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(map&& __m) noexcept(is_nothrow_move_constructible<__base>::value) | 
 |       : __tree_(std::move(__m.__tree_)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(map&& __m, const allocator_type& __a); | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map& operator=(map&& __m) noexcept(is_nothrow_move_assignable<__base>::value) { | 
 |     __tree_ = std::move(__m.__tree_); | 
 |     return *this; | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(initializer_list<value_type> __il, const key_compare& __comp = key_compare()) | 
 |       : __tree_(__vc(__comp)) { | 
 |     insert(__il.begin(), __il.end()); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert(__il.begin(), __il.end()); | 
 |   } | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 14 | 
 |   _LIBCPP_HIDE_FROM_ABI map(initializer_list<value_type> __il, const allocator_type& __a) | 
 |       : map(__il, key_compare(), __a) {} | 
 | #    endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map& operator=(initializer_list<value_type> __il) { | 
 |     __tree_.__assign_unique(__il.begin(), __il.end()); | 
 |     return *this; | 
 |   } | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit map(const allocator_type& __a) : __tree_(typename __base::allocator_type(__a)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI map(const map& __m, const allocator_type& __a) | 
 |       : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a)) { | 
 |     insert(__m.begin(), __m.end()); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI ~map() { static_assert(sizeof(std::__diagnose_non_const_comparator<_Key, _Compare>()), ""); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT { return __tree_.begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return __tree_.begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT { return __tree_.end(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return __tree_.end(); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI reverse_iterator rbegin() _NOEXCEPT { return reverse_iterator(end()); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(end()); } | 
 |   _LIBCPP_HIDE_FROM_ABI reverse_iterator rend() _NOEXCEPT { return reverse_iterator(begin()); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(begin()); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator cbegin() const _NOEXCEPT { return begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator cend() const _NOEXCEPT { return end(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crbegin() const _NOEXCEPT { return rbegin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crend() const _NOEXCEPT { return rend(); } | 
 |  | 
 |   [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool empty() const _NOEXCEPT { return __tree_.size() == 0; } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type size() const _NOEXCEPT { return __tree_.size(); } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type max_size() const _NOEXCEPT { return __tree_.max_size(); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI mapped_type& operator[](const key_type& __k); | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |   _LIBCPP_HIDE_FROM_ABI mapped_type& operator[](key_type&& __k); | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI mapped_type& at(const key_type& __k); | 
 |   _LIBCPP_HIDE_FROM_ABI const mapped_type& at(const key_type& __k) const; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT { return allocator_type(__tree_.__alloc()); } | 
 |   _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp().key_comp(); } | 
 |   _LIBCPP_HIDE_FROM_ABI value_compare value_comp() const { return value_compare(__tree_.value_comp().key_comp()); } | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> emplace(_Args&&... __args) { | 
 |     return __tree_.__emplace_unique(std::forward<_Args>(__args)...); | 
 |   } | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator emplace_hint(const_iterator __p, _Args&&... __args) { | 
 |     return __tree_.__emplace_hint_unique(__p.__i_, std::forward<_Args>(__args)...); | 
 |   } | 
 |  | 
 |   template <class _Pp, __enable_if_t<is_constructible<value_type, _Pp>::value, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert(_Pp&& __p) { | 
 |     return __tree_.__insert_unique(std::forward<_Pp>(__p)); | 
 |   } | 
 |  | 
 |   template <class _Pp, __enable_if_t<is_constructible<value_type, _Pp>::value, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __pos, _Pp&& __p) { | 
 |     return __tree_.__insert_unique(__pos.__i_, std::forward<_Pp>(__p)); | 
 |   } | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert(const value_type& __v) { return __tree_.__insert_unique(__v); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, const value_type& __v) { | 
 |     return __tree_.__insert_unique(__p.__i_, __v); | 
 |   } | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert(value_type&& __v) { | 
 |     return __tree_.__insert_unique(std::move(__v)); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, value_type&& __v) { | 
 |     return __tree_.__insert_unique(__p.__i_, std::move(__v)); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void insert(initializer_list<value_type> __il) { insert(__il.begin(), __il.end()); } | 
 | #  endif | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI void insert(_InputIterator __f, _InputIterator __l) { | 
 |     for (const_iterator __e = cend(); __f != __l; ++__f) | 
 |       insert(__e.__i_, *__f); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI void insert_range(_Range&& __range) { | 
 |     const_iterator __end = cend(); | 
 |     for (auto&& __element : __range) { | 
 |       insert(__end.__i_, std::forward<decltype(__element)>(__element)); | 
 |     } | 
 |   } | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> try_emplace(const key_type& __k, _Args&&... __args) { | 
 |     return __tree_.__emplace_unique_key_args( | 
 |         __k, | 
 |         std::piecewise_construct, | 
 |         std::forward_as_tuple(__k), | 
 |         std::forward_as_tuple(std::forward<_Args>(__args)...)); | 
 |   } | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> try_emplace(key_type&& __k, _Args&&... __args) { | 
 |     return __tree_.__emplace_unique_key_args( | 
 |         __k, | 
 |         std::piecewise_construct, | 
 |         std::forward_as_tuple(std::move(__k)), | 
 |         std::forward_as_tuple(std::forward<_Args>(__args)...)); | 
 |   } | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator try_emplace(const_iterator __h, const key_type& __k, _Args&&... __args) { | 
 |     return __tree_ | 
 |         .__emplace_hint_unique_key_args( | 
 |             __h.__i_, | 
 |             __k, | 
 |             std::piecewise_construct, | 
 |             std::forward_as_tuple(__k), | 
 |             std::forward_as_tuple(std::forward<_Args>(__args)...)) | 
 |         .first; | 
 |   } | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator try_emplace(const_iterator __h, key_type&& __k, _Args&&... __args) { | 
 |     return __tree_ | 
 |         .__emplace_hint_unique_key_args( | 
 |             __h.__i_, | 
 |             __k, | 
 |             std::piecewise_construct, | 
 |             std::forward_as_tuple(std::move(__k)), | 
 |             std::forward_as_tuple(std::forward<_Args>(__args)...)) | 
 |         .first; | 
 |   } | 
 |  | 
 |   template <class _Vp> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert_or_assign(const key_type& __k, _Vp&& __v) { | 
 |     iterator __p = lower_bound(__k); | 
 |     if (__p != end() && !key_comp()(__k, __p->first)) { | 
 |       __p->second = std::forward<_Vp>(__v); | 
 |       return std::make_pair(__p, false); | 
 |     } | 
 |     return std::make_pair(emplace_hint(__p, __k, std::forward<_Vp>(__v)), true); | 
 |   } | 
 |  | 
 |   template <class _Vp> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert_or_assign(key_type&& __k, _Vp&& __v) { | 
 |     iterator __p = lower_bound(__k); | 
 |     if (__p != end() && !key_comp()(__k, __p->first)) { | 
 |       __p->second = std::forward<_Vp>(__v); | 
 |       return std::make_pair(__p, false); | 
 |     } | 
 |     return std::make_pair(emplace_hint(__p, std::move(__k), std::forward<_Vp>(__v)), true); | 
 |   } | 
 |  | 
 |   template <class _Vp> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert_or_assign(const_iterator __h, const key_type& __k, _Vp&& __v) { | 
 |     auto [__r, __inserted] = __tree_.__emplace_hint_unique_key_args(__h.__i_, __k, __k, std::forward<_Vp>(__v)); | 
 |  | 
 |     if (!__inserted) | 
 |       __r->__get_value().second = std::forward<_Vp>(__v); | 
 |  | 
 |     return __r; | 
 |   } | 
 |  | 
 |   template <class _Vp> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert_or_assign(const_iterator __h, key_type&& __k, _Vp&& __v) { | 
 |     auto [__r, __inserted] = | 
 |         __tree_.__emplace_hint_unique_key_args(__h.__i_, __k, std::move(__k), std::forward<_Vp>(__v)); | 
 |  | 
 |     if (!__inserted) | 
 |       __r->__get_value().second = std::forward<_Vp>(__v); | 
 |  | 
 |     return __r; | 
 |   } | 
 |  | 
 | #  endif // _LIBCPP_STD_VER >= 17 | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __p) { return __tree_.erase(__p.__i_); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(iterator __p) { return __tree_.erase(__p.__i_); } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type erase(const key_type& __k) { return __tree_.__erase_unique(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __f, const_iterator __l) { | 
 |     return __tree_.erase(__f.__i_, __l.__i_); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI void clear() _NOEXCEPT { __tree_.clear(); } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 |   _LIBCPP_HIDE_FROM_ABI insert_return_type insert(node_type&& __nh) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(__nh.empty() || __nh.get_allocator() == get_allocator(), | 
 |                                         "node_type with incompatible allocator passed to map::insert()"); | 
 |     return __tree_.template __node_handle_insert_unique< node_type, insert_return_type>(std::move(__nh)); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __hint, node_type&& __nh) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(__nh.empty() || __nh.get_allocator() == get_allocator(), | 
 |                                         "node_type with incompatible allocator passed to map::insert()"); | 
 |     return __tree_.template __node_handle_insert_unique<node_type>(__hint.__i_, std::move(__nh)); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI node_type extract(key_type const& __key) { | 
 |     return __tree_.template __node_handle_extract<node_type>(__key); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI node_type extract(const_iterator __it) { | 
 |     return __tree_.template __node_handle_extract<node_type>(__it.__i_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(map<key_type, mapped_type, _Compare2, allocator_type>& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     __tree_.__node_handle_merge_unique(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(map<key_type, mapped_type, _Compare2, allocator_type>&& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     __tree_.__node_handle_merge_unique(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(multimap<key_type, mapped_type, _Compare2, allocator_type>& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     __tree_.__node_handle_merge_unique(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(multimap<key_type, mapped_type, _Compare2, allocator_type>&& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     __tree_.__node_handle_merge_unique(__source.__tree_); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void swap(map& __m) _NOEXCEPT_(__is_nothrow_swappable_v<__base>) { __tree_.swap(__m.__tree_); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator find(const key_type& __k) { return __tree_.find(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator find(const key_type& __k) const { return __tree_.find(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator find(const _K2& __k) { | 
 |     return __tree_.find(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator find(const _K2& __k) const { | 
 |     return __tree_.find(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI size_type count(const key_type& __k) const { return __tree_.__count_unique(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI size_type count(const _K2& __k) const { | 
 |     return __tree_.__count_multi(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 20 | 
 |   _LIBCPP_HIDE_FROM_ABI bool contains(const key_type& __k) const { return find(__k) != end(); } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI bool contains(const _K2& __k) const { | 
 |     return find(__k) != end(); | 
 |   } | 
 | #  endif // _LIBCPP_STD_VER >= 20 | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const key_type& __k) { return __tree_.lower_bound(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const key_type& __k) const { return __tree_.lower_bound(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const _K2& __k) { | 
 |     return __tree_.lower_bound(__k); | 
 |   } | 
 |  | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const _K2& __k) const { | 
 |     return __tree_.lower_bound(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const key_type& __k) { return __tree_.upper_bound(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const key_type& __k) const { return __tree_.upper_bound(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const _K2& __k) { | 
 |     return __tree_.upper_bound(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const _K2& __k) const { | 
 |     return __tree_.upper_bound(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const key_type& __k) { | 
 |     return __tree_.__equal_range_unique(__k); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI pair<const_iterator, const_iterator> equal_range(const key_type& __k) const { | 
 |     return __tree_.__equal_range_unique(__k); | 
 |   } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const _K2& __k) { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<const_iterator, const_iterator> equal_range(const _K2& __k) const { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 | private: | 
 |   typedef typename __base::__node __node; | 
 |   typedef typename __base::__node_allocator __node_allocator; | 
 |   typedef typename __base::__node_pointer __node_pointer; | 
 |   typedef typename __base::__node_base_pointer __node_base_pointer; | 
 |   typedef typename __base::__parent_pointer __parent_pointer; | 
 |  | 
 |   typedef __map_node_destructor<__node_allocator> _Dp; | 
 |   typedef unique_ptr<__node, _Dp> __node_holder; | 
 |  | 
 | #  ifdef _LIBCPP_CXX03_LANG | 
 |   _LIBCPP_HIDE_FROM_ABI __node_holder __construct_node_with_key(const key_type& __k); | 
 | #  endif | 
 | }; | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 | template <class _InputIterator, | 
 |           class _Compare   = less<__iter_key_type<_InputIterator>>, | 
 |           class _Allocator = allocator<__iter_to_alloc_type<_InputIterator>>, | 
 |           class            = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(_InputIterator, _InputIterator, _Compare = _Compare(), _Allocator = _Allocator()) | 
 |     -> map<__iter_key_type<_InputIterator>, __iter_mapped_type<_InputIterator>, _Compare, _Allocator>; | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 23 | 
 | template <ranges::input_range _Range, | 
 |           class _Compare   = less<__range_key_type<_Range>>, | 
 |           class _Allocator = allocator<__range_to_alloc_type<_Range>>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(from_range_t, _Range&&, _Compare = _Compare(), _Allocator = _Allocator()) | 
 |     -> map<__range_key_type<_Range>, __range_mapped_type<_Range>, _Compare, _Allocator>; | 
 | #    endif | 
 |  | 
 | template <class _Key, | 
 |           class _Tp, | 
 |           class _Compare   = less<remove_const_t<_Key>>, | 
 |           class _Allocator = allocator<pair<const _Key, _Tp>>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(initializer_list<pair<_Key, _Tp>>, | 
 |     _Compare   = _Compare(), | 
 |     _Allocator = _Allocator()) -> map<remove_const_t<_Key>, _Tp, _Compare, _Allocator>; | 
 |  | 
 | template <class _InputIterator, | 
 |           class _Allocator, | 
 |           class = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>, | 
 |           class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(_InputIterator, _InputIterator, _Allocator) | 
 |     -> map<__iter_key_type<_InputIterator>, | 
 |            __iter_mapped_type<_InputIterator>, | 
 |            less<__iter_key_type<_InputIterator>>, | 
 |            _Allocator>; | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 23 | 
 | template <ranges::input_range _Range, class _Allocator, class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(from_range_t, _Range&&, _Allocator) | 
 |     -> map<__range_key_type<_Range>, __range_mapped_type<_Range>, less<__range_key_type<_Range>>, _Allocator>; | 
 | #    endif | 
 |  | 
 | template <class _Key, class _Tp, class _Allocator, class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | map(initializer_list<pair<_Key, _Tp>>, | 
 |     _Allocator) -> map<remove_const_t<_Key>, _Tp, less<remove_const_t<_Key>>, _Allocator>; | 
 | #  endif | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | map<_Key, _Tp, _Compare, _Allocator>::map(map&& __m, const allocator_type& __a) | 
 |     : __tree_(std::move(__m.__tree_), typename __base::allocator_type(__a)) { | 
 |   if (__a != __m.get_allocator()) { | 
 |     const_iterator __e = cend(); | 
 |     while (!__m.empty()) | 
 |       __tree_.__insert_unique(__e.__i_, __m.__tree_.remove(__m.begin().__i_)->__value_.__move()); | 
 |   } | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k) { | 
 |   return __tree_ | 
 |       .__emplace_unique_key_args(__k, std::piecewise_construct, std::forward_as_tuple(__k), std::forward_as_tuple()) | 
 |       .first->__get_value() | 
 |       .second; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k) { | 
 |   // TODO investigate this clang-tidy warning. | 
 |   // NOLINTBEGIN(bugprone-use-after-move) | 
 |   return __tree_ | 
 |       .__emplace_unique_key_args( | 
 |           __k, std::piecewise_construct, std::forward_as_tuple(std::move(__k)), std::forward_as_tuple()) | 
 |       .first->__get_value() | 
 |       .second; | 
 |   // NOLINTEND(bugprone-use-after-move) | 
 | } | 
 |  | 
 | #  else // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | typename map<_Key, _Tp, _Compare, _Allocator>::__node_holder | 
 | map<_Key, _Tp, _Compare, _Allocator>::__construct_node_with_key(const key_type& __k) { | 
 |   __node_allocator& __na = __tree_.__node_alloc(); | 
 |   __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na)); | 
 |   __node_traits::construct(__na, std::addressof(__h->__value_.__get_value().first), __k); | 
 |   __h.get_deleter().__first_constructed = true; | 
 |   __node_traits::construct(__na, std::addressof(__h->__value_.__get_value().second)); | 
 |   __h.get_deleter().__second_constructed = true; | 
 |   return __h; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k) { | 
 |   __parent_pointer __parent; | 
 |   __node_base_pointer& __child = __tree_.__find_equal(__parent, __k); | 
 |   __node_pointer __r           = static_cast<__node_pointer>(__child); | 
 |   if (__child == nullptr) { | 
 |     __node_holder __h = __construct_node_with_key(__k); | 
 |     __tree_.__insert_node_at(__parent, __child, static_cast<__node_base_pointer>(__h.get())); | 
 |     __r = __h.release(); | 
 |   } | 
 |   return __r->__value_.__get_value().second; | 
 | } | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _Tp& map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) { | 
 |   __parent_pointer __parent; | 
 |   __node_base_pointer& __child = __tree_.__find_equal(__parent, __k); | 
 |   if (__child == nullptr) | 
 |     std::__throw_out_of_range("map::at:  key not found"); | 
 |   return static_cast<__node_pointer>(__child)->__value_.__get_value().second; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | const _Tp& map<_Key, _Tp, _Compare, _Allocator>::at(const key_type& __k) const { | 
 |   __parent_pointer __parent; | 
 |   __node_base_pointer __child = __tree_.__find_equal(__parent, __k); | 
 |   if (__child == nullptr) | 
 |     std::__throw_out_of_range("map::at:  key not found"); | 
 |   return static_cast<__node_pointer>(__child)->__value_.__get_value().second; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator==(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return __x.size() == __y.size() && std::equal(__x.begin(), __x.end(), __y.begin()); | 
 | } | 
 |  | 
 | #  if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator<(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return std::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end()); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__x == __y); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator>(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return __y < __x; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__x < __y); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__y < __x); | 
 | } | 
 |  | 
 | #  else // #if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _LIBCPP_HIDE_FROM_ABI __synth_three_way_result<pair<const _Key, _Tp>> | 
 | operator<=>(const map<_Key, _Tp, _Compare, _Allocator>& __x, const map<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return std::lexicographical_compare_three_way(__x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way); | 
 | } | 
 |  | 
 | #  endif // #if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI void | 
 | swap(map<_Key, _Tp, _Compare, _Allocator>& __x, map<_Key, _Tp, _Compare, _Allocator>& __y) | 
 |     _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y))) { | 
 |   __x.swap(__y); | 
 | } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 20 | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator, class _Predicate> | 
 | inline _LIBCPP_HIDE_FROM_ABI typename map<_Key, _Tp, _Compare, _Allocator>::size_type | 
 | erase_if(map<_Key, _Tp, _Compare, _Allocator>& __c, _Predicate __pred) { | 
 |   return std::__libcpp_erase_if_container(__c, __pred); | 
 | } | 
 | #  endif | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | struct __container_traits<map<_Key, _Tp, _Compare, _Allocator> > { | 
 |   // http://eel.is/c++draft/associative.reqmts.except#2 | 
 |   // For associative containers, if an exception is thrown by any operation from within | 
 |   // an insert or emplace function inserting a single element, the insertion has no effect. | 
 |   static _LIBCPP_CONSTEXPR const bool __emplacement_has_strong_exception_safety_guarantee = true; | 
 | }; | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | class multimap { | 
 | public: | 
 |   // types: | 
 |   typedef _Key key_type; | 
 |   typedef _Tp mapped_type; | 
 |   typedef pair<const key_type, mapped_type> value_type; | 
 |   typedef __type_identity_t<_Compare> key_compare; | 
 |   typedef __type_identity_t<_Allocator> allocator_type; | 
 |   typedef value_type& reference; | 
 |   typedef const value_type& const_reference; | 
 |  | 
 |   static_assert(__check_valid_allocator<allocator_type>::value, ""); | 
 |   static_assert(is_same<typename allocator_type::value_type, value_type>::value, | 
 |                 "Allocator::value_type must be same type as value_type"); | 
 |  | 
 |   class value_compare : public __binary_function<value_type, value_type, bool> { | 
 |     friend class multimap; | 
 |  | 
 |   protected: | 
 |     key_compare comp; | 
 |  | 
 |     _LIBCPP_HIDE_FROM_ABI value_compare(key_compare __c) : comp(__c) {} | 
 |  | 
 |   public: | 
 |     _LIBCPP_HIDE_FROM_ABI bool operator()(const value_type& __x, const value_type& __y) const { | 
 |       return comp(__x.first, __y.first); | 
 |     } | 
 |   }; | 
 |  | 
 | private: | 
 |   typedef std::__value_type<key_type, mapped_type> __value_type; | 
 |   typedef __map_value_compare<key_type, __value_type, key_compare> __vc; | 
 |   typedef __rebind_alloc<allocator_traits<allocator_type>, __value_type> __allocator_type; | 
 |   typedef __tree<__value_type, __vc, __allocator_type> __base; | 
 |   typedef typename __base::__node_traits __node_traits; | 
 |   typedef allocator_traits<allocator_type> __alloc_traits; | 
 |  | 
 |   __base __tree_; | 
 |  | 
 | public: | 
 |   typedef typename __alloc_traits::pointer pointer; | 
 |   typedef typename __alloc_traits::const_pointer const_pointer; | 
 |   typedef typename __alloc_traits::size_type size_type; | 
 |   typedef typename __alloc_traits::difference_type difference_type; | 
 |   typedef __map_iterator<typename __base::iterator> iterator; | 
 |   typedef __map_const_iterator<typename __base::const_iterator> const_iterator; | 
 |   typedef std::reverse_iterator<iterator> reverse_iterator; | 
 |   typedef std::reverse_iterator<const_iterator> const_reverse_iterator; | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 |   typedef __map_node_handle<typename __base::__node, allocator_type> node_type; | 
 | #  endif | 
 |  | 
 |   template <class _Key2, class _Value2, class _Comp2, class _Alloc2> | 
 |   friend class map; | 
 |   template <class _Key2, class _Value2, class _Comp2, class _Alloc2> | 
 |   friend class multimap; | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap() _NOEXCEPT_( | 
 |       is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_default_constructible<key_compare>::value&& | 
 |           is_nothrow_copy_constructible<key_compare>::value) | 
 |       : __tree_(__vc(key_compare())) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit multimap(const key_compare& __comp) _NOEXCEPT_( | 
 |       is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_copy_constructible<key_compare>::value) | 
 |       : __tree_(__vc(__comp)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit multimap(const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) {} | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(_InputIterator __f, _InputIterator __l, const key_compare& __comp = key_compare()) | 
 |       : __tree_(__vc(__comp)) { | 
 |     insert(__f, __l); | 
 |   } | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   multimap(_InputIterator __f, _InputIterator __l, const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert(__f, __l); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   multimap(from_range_t, | 
 |            _Range&& __range, | 
 |            const key_compare& __comp = key_compare(), | 
 |            const allocator_type& __a = allocator_type()) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert_range(std::forward<_Range>(__range)); | 
 |   } | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(_InputIterator __f, _InputIterator __l, const allocator_type& __a) | 
 |       : multimap(__f, __l, key_compare(), __a) {} | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(from_range_t, _Range&& __range, const allocator_type& __a) | 
 |       : multimap(from_range, std::forward<_Range>(__range), key_compare(), __a) {} | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(const multimap& __m) | 
 |       : __tree_(__m.__tree_.value_comp(), | 
 |                 __alloc_traits::select_on_container_copy_construction(__m.__tree_.__alloc())) { | 
 |     insert(__m.begin(), __m.end()); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap& operator=(const multimap& __m) { | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |     __tree_ = __m.__tree_; | 
 | #  else | 
 |     if (this != std::addressof(__m)) { | 
 |       __tree_.clear(); | 
 |       __tree_.value_comp() = __m.__tree_.value_comp(); | 
 |       __tree_.__copy_assign_alloc(__m.__tree_); | 
 |       insert(__m.begin(), __m.end()); | 
 |     } | 
 | #  endif | 
 |     return *this; | 
 |   } | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(multimap&& __m) noexcept(is_nothrow_move_constructible<__base>::value) | 
 |       : __tree_(std::move(__m.__tree_)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(multimap&& __m, const allocator_type& __a); | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap& operator=(multimap&& __m) noexcept(is_nothrow_move_assignable<__base>::value) { | 
 |     __tree_ = std::move(__m.__tree_); | 
 |     return *this; | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(initializer_list<value_type> __il, const key_compare& __comp = key_compare()) | 
 |       : __tree_(__vc(__comp)) { | 
 |     insert(__il.begin(), __il.end()); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI | 
 |   multimap(initializer_list<value_type> __il, const key_compare& __comp, const allocator_type& __a) | 
 |       : __tree_(__vc(__comp), typename __base::allocator_type(__a)) { | 
 |     insert(__il.begin(), __il.end()); | 
 |   } | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 14 | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(initializer_list<value_type> __il, const allocator_type& __a) | 
 |       : multimap(__il, key_compare(), __a) {} | 
 | #    endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap& operator=(initializer_list<value_type> __il) { | 
 |     __tree_.__assign_multi(__il.begin(), __il.end()); | 
 |     return *this; | 
 |   } | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI explicit multimap(const allocator_type& __a) : __tree_(typename __base::allocator_type(__a)) {} | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI multimap(const multimap& __m, const allocator_type& __a) | 
 |       : __tree_(__m.__tree_.value_comp(), typename __base::allocator_type(__a)) { | 
 |     insert(__m.begin(), __m.end()); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI ~multimap() { | 
 |     static_assert(sizeof(std::__diagnose_non_const_comparator<_Key, _Compare>()), ""); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT { return __tree_.begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return __tree_.begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT { return __tree_.end(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return __tree_.end(); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI reverse_iterator rbegin() _NOEXCEPT { return reverse_iterator(end()); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rbegin() const _NOEXCEPT { return const_reverse_iterator(end()); } | 
 |   _LIBCPP_HIDE_FROM_ABI reverse_iterator rend() _NOEXCEPT { return reverse_iterator(begin()); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rend() const _NOEXCEPT { return const_reverse_iterator(begin()); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator cbegin() const _NOEXCEPT { return begin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator cend() const _NOEXCEPT { return end(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crbegin() const _NOEXCEPT { return rbegin(); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crend() const _NOEXCEPT { return rend(); } | 
 |  | 
 |   [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool empty() const _NOEXCEPT { return __tree_.size() == 0; } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type size() const _NOEXCEPT { return __tree_.size(); } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type max_size() const _NOEXCEPT { return __tree_.max_size(); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT { return allocator_type(__tree_.__alloc()); } | 
 |   _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp().key_comp(); } | 
 |   _LIBCPP_HIDE_FROM_ABI value_compare value_comp() const { return value_compare(__tree_.value_comp().key_comp()); } | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator emplace(_Args&&... __args) { | 
 |     return __tree_.__emplace_multi(std::forward<_Args>(__args)...); | 
 |   } | 
 |  | 
 |   template <class... _Args> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator emplace_hint(const_iterator __p, _Args&&... __args) { | 
 |     return __tree_.__emplace_hint_multi(__p.__i_, std::forward<_Args>(__args)...); | 
 |   } | 
 |  | 
 |   template <class _Pp, __enable_if_t<is_constructible<value_type, _Pp>::value, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(_Pp&& __p) { | 
 |     return __tree_.__insert_multi(std::forward<_Pp>(__p)); | 
 |   } | 
 |  | 
 |   template <class _Pp, __enable_if_t<is_constructible<value_type, _Pp>::value, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __pos, _Pp&& __p) { | 
 |     return __tree_.__insert_multi(__pos.__i_, std::forward<_Pp>(__p)); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(value_type&& __v) { return __tree_.__insert_multi(std::move(__v)); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, value_type&& __v) { | 
 |     return __tree_.__insert_multi(__p.__i_, std::move(__v)); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void insert(initializer_list<value_type> __il) { insert(__il.begin(), __il.end()); } | 
 |  | 
 | #  endif // _LIBCPP_CXX03_LANG | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const value_type& __v) { return __tree_.__insert_multi(__v); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, const value_type& __v) { | 
 |     return __tree_.__insert_multi(__p.__i_, __v); | 
 |   } | 
 |  | 
 |   template <class _InputIterator> | 
 |   _LIBCPP_HIDE_FROM_ABI void insert(_InputIterator __f, _InputIterator __l) { | 
 |     for (const_iterator __e = cend(); __f != __l; ++__f) | 
 |       __tree_.__insert_multi(__e.__i_, *__f); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 23 | 
 |   template <_ContainerCompatibleRange<value_type> _Range> | 
 |   _LIBCPP_HIDE_FROM_ABI void insert_range(_Range&& __range) { | 
 |     const_iterator __end = cend(); | 
 |     for (auto&& __element : __range) { | 
 |       __tree_.__insert_multi(__end.__i_, std::forward<decltype(__element)>(__element)); | 
 |     } | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __p) { return __tree_.erase(__p.__i_); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(iterator __p) { return __tree_.erase(__p.__i_); } | 
 |   _LIBCPP_HIDE_FROM_ABI size_type erase(const key_type& __k) { return __tree_.__erase_multi(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator erase(const_iterator __f, const_iterator __l) { | 
 |     return __tree_.erase(__f.__i_, __l.__i_); | 
 |   } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(node_type&& __nh) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(__nh.empty() || __nh.get_allocator() == get_allocator(), | 
 |                                         "node_type with incompatible allocator passed to multimap::insert()"); | 
 |     return __tree_.template __node_handle_insert_multi<node_type>(std::move(__nh)); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __hint, node_type&& __nh) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(__nh.empty() || __nh.get_allocator() == get_allocator(), | 
 |                                         "node_type with incompatible allocator passed to multimap::insert()"); | 
 |     return __tree_.template __node_handle_insert_multi<node_type>(__hint.__i_, std::move(__nh)); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI node_type extract(key_type const& __key) { | 
 |     return __tree_.template __node_handle_extract<node_type>(__key); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI node_type extract(const_iterator __it) { | 
 |     return __tree_.template __node_handle_extract<node_type>(__it.__i_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(multimap<key_type, mapped_type, _Compare2, allocator_type>& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     return __tree_.__node_handle_merge_multi(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(multimap<key_type, mapped_type, _Compare2, allocator_type>&& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     return __tree_.__node_handle_merge_multi(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(map<key_type, mapped_type, _Compare2, allocator_type>& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     return __tree_.__node_handle_merge_multi(__source.__tree_); | 
 |   } | 
 |   template <class _Compare2> | 
 |   _LIBCPP_HIDE_FROM_ABI void merge(map<key_type, mapped_type, _Compare2, allocator_type>&& __source) { | 
 |     _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR( | 
 |         __source.get_allocator() == get_allocator(), "merging container with incompatible allocator"); | 
 |     return __tree_.__node_handle_merge_multi(__source.__tree_); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void clear() _NOEXCEPT { __tree_.clear(); } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI void swap(multimap& __m) _NOEXCEPT_(__is_nothrow_swappable_v<__base>) { | 
 |     __tree_.swap(__m.__tree_); | 
 |   } | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator find(const key_type& __k) { return __tree_.find(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator find(const key_type& __k) const { return __tree_.find(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator find(const _K2& __k) { | 
 |     return __tree_.find(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator find(const _K2& __k) const { | 
 |     return __tree_.find(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI size_type count(const key_type& __k) const { return __tree_.__count_multi(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI size_type count(const _K2& __k) const { | 
 |     return __tree_.__count_multi(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 20 | 
 |   _LIBCPP_HIDE_FROM_ABI bool contains(const key_type& __k) const { return find(__k) != end(); } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI bool contains(const _K2& __k) const { | 
 |     return find(__k) != end(); | 
 |   } | 
 | #  endif // _LIBCPP_STD_VER >= 20 | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const key_type& __k) { return __tree_.lower_bound(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const key_type& __k) const { return __tree_.lower_bound(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const _K2& __k) { | 
 |     return __tree_.lower_bound(__k); | 
 |   } | 
 |  | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const _K2& __k) const { | 
 |     return __tree_.lower_bound(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const key_type& __k) { return __tree_.upper_bound(__k); } | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const key_type& __k) const { return __tree_.upper_bound(__k); } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const _K2& __k) { | 
 |     return __tree_.upper_bound(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const _K2& __k) const { | 
 |     return __tree_.upper_bound(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const key_type& __k) { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 |   _LIBCPP_HIDE_FROM_ABI pair<const_iterator, const_iterator> equal_range(const key_type& __k) const { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 | #  if _LIBCPP_STD_VER >= 14 | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const _K2& __k) { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 |   template <typename _K2, enable_if_t<__is_transparent_v<_Compare, _K2>, int> = 0> | 
 |   _LIBCPP_HIDE_FROM_ABI pair<const_iterator, const_iterator> equal_range(const _K2& __k) const { | 
 |     return __tree_.__equal_range_multi(__k); | 
 |   } | 
 | #  endif | 
 |  | 
 | private: | 
 |   typedef typename __base::__node __node; | 
 |   typedef typename __base::__node_allocator __node_allocator; | 
 |   typedef typename __base::__node_pointer __node_pointer; | 
 |  | 
 |   typedef __map_node_destructor<__node_allocator> _Dp; | 
 |   typedef unique_ptr<__node, _Dp> __node_holder; | 
 | }; | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 | template <class _InputIterator, | 
 |           class _Compare   = less<__iter_key_type<_InputIterator>>, | 
 |           class _Allocator = allocator<__iter_to_alloc_type<_InputIterator>>, | 
 |           class            = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(_InputIterator, _InputIterator, _Compare = _Compare(), _Allocator = _Allocator()) | 
 |     -> multimap<__iter_key_type<_InputIterator>, __iter_mapped_type<_InputIterator>, _Compare, _Allocator>; | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 23 | 
 | template <ranges::input_range _Range, | 
 |           class _Compare   = less<__range_key_type<_Range>>, | 
 |           class _Allocator = allocator<__range_to_alloc_type<_Range>>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(from_range_t, _Range&&, _Compare = _Compare(), _Allocator = _Allocator()) | 
 |     -> multimap<__range_key_type<_Range>, __range_mapped_type<_Range>, _Compare, _Allocator>; | 
 | #    endif | 
 |  | 
 | template <class _Key, | 
 |           class _Tp, | 
 |           class _Compare   = less<remove_const_t<_Key>>, | 
 |           class _Allocator = allocator<pair<const _Key, _Tp>>, | 
 |           class            = enable_if_t<!__is_allocator<_Compare>::value, void>, | 
 |           class            = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(initializer_list<pair<_Key, _Tp>>, | 
 |          _Compare   = _Compare(), | 
 |          _Allocator = _Allocator()) -> multimap<remove_const_t<_Key>, _Tp, _Compare, _Allocator>; | 
 |  | 
 | template <class _InputIterator, | 
 |           class _Allocator, | 
 |           class = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>, | 
 |           class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(_InputIterator, _InputIterator, _Allocator) | 
 |     -> multimap<__iter_key_type<_InputIterator>, | 
 |                 __iter_mapped_type<_InputIterator>, | 
 |                 less<__iter_key_type<_InputIterator>>, | 
 |                 _Allocator>; | 
 |  | 
 | #    if _LIBCPP_STD_VER >= 23 | 
 | template <ranges::input_range _Range, class _Allocator, class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(from_range_t, _Range&&, _Allocator) | 
 |     -> multimap<__range_key_type<_Range>, __range_mapped_type<_Range>, less<__range_key_type<_Range>>, _Allocator>; | 
 | #    endif | 
 |  | 
 | template <class _Key, class _Tp, class _Allocator, class = enable_if_t<__is_allocator<_Allocator>::value, void>> | 
 | multimap(initializer_list<pair<_Key, _Tp>>, | 
 |          _Allocator) -> multimap<remove_const_t<_Key>, _Tp, less<remove_const_t<_Key>>, _Allocator>; | 
 | #  endif | 
 |  | 
 | #  ifndef _LIBCPP_CXX03_LANG | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | multimap<_Key, _Tp, _Compare, _Allocator>::multimap(multimap&& __m, const allocator_type& __a) | 
 |     : __tree_(std::move(__m.__tree_), typename __base::allocator_type(__a)) { | 
 |   if (__a != __m.get_allocator()) { | 
 |     const_iterator __e = cend(); | 
 |     while (!__m.empty()) | 
 |       __tree_.__insert_multi(__e.__i_, std::move(__m.__tree_.remove(__m.begin().__i_)->__value_.__move())); | 
 |   } | 
 | } | 
 | #  endif | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator==(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return __x.size() == __y.size() && std::equal(__x.begin(), __x.end(), __y.begin()); | 
 | } | 
 |  | 
 | #  if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator<(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return std::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end()); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator!=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__x == __y); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator>(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return __y < __x; | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator>=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__x < __y); | 
 | } | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI bool | 
 | operator<=(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return !(__y < __x); | 
 | } | 
 |  | 
 | #  else // #if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | _LIBCPP_HIDE_FROM_ABI __synth_three_way_result<pair<const _Key, _Tp>> | 
 | operator<=>(const multimap<_Key, _Tp, _Compare, _Allocator>& __x, | 
 |             const multimap<_Key, _Tp, _Compare, _Allocator>& __y) { | 
 |   return std::lexicographical_compare_three_way(__x.begin(), __x.end(), __y.begin(), __y.end(), __synth_three_way); | 
 | } | 
 |  | 
 | #  endif // #if _LIBCPP_STD_VER <= 17 | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | inline _LIBCPP_HIDE_FROM_ABI void | 
 | swap(multimap<_Key, _Tp, _Compare, _Allocator>& __x, multimap<_Key, _Tp, _Compare, _Allocator>& __y) | 
 |     _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y))) { | 
 |   __x.swap(__y); | 
 | } | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 20 | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator, class _Predicate> | 
 | inline _LIBCPP_HIDE_FROM_ABI typename multimap<_Key, _Tp, _Compare, _Allocator>::size_type | 
 | erase_if(multimap<_Key, _Tp, _Compare, _Allocator>& __c, _Predicate __pred) { | 
 |   return std::__libcpp_erase_if_container(__c, __pred); | 
 | } | 
 | #  endif | 
 |  | 
 | template <class _Key, class _Tp, class _Compare, class _Allocator> | 
 | struct __container_traits<multimap<_Key, _Tp, _Compare, _Allocator> > { | 
 |   // http://eel.is/c++draft/associative.reqmts.except#2 | 
 |   // For associative containers, if an exception is thrown by any operation from within | 
 |   // an insert or emplace function inserting a single element, the insertion has no effect. | 
 |   static _LIBCPP_CONSTEXPR const bool __emplacement_has_strong_exception_safety_guarantee = true; | 
 | }; | 
 |  | 
 | _LIBCPP_END_NAMESPACE_STD | 
 |  | 
 | #  if _LIBCPP_STD_VER >= 17 | 
 | _LIBCPP_BEGIN_NAMESPACE_STD | 
 | namespace pmr { | 
 | template <class _KeyT, class _ValueT, class _CompareT = std::less<_KeyT>> | 
 | using map _LIBCPP_AVAILABILITY_PMR = | 
 |     std::map<_KeyT, _ValueT, _CompareT, polymorphic_allocator<std::pair<const _KeyT, _ValueT>>>; | 
 |  | 
 | template <class _KeyT, class _ValueT, class _CompareT = std::less<_KeyT>> | 
 | using multimap _LIBCPP_AVAILABILITY_PMR = | 
 |     std::multimap<_KeyT, _ValueT, _CompareT, polymorphic_allocator<std::pair<const _KeyT, _ValueT>>>; | 
 | } // namespace pmr | 
 | _LIBCPP_END_NAMESPACE_STD | 
 | #  endif | 
 |  | 
 | _LIBCPP_POP_MACROS | 
 |  | 
 | #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 | 
 | #    include <concepts> | 
 | #    include <cstdlib> | 
 | #    include <functional> | 
 | #    include <iterator> | 
 | #    include <type_traits> | 
 | #    include <utility> | 
 | #  endif | 
 | #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) | 
 |  | 
 | #endif // _LIBCPP_MAP |