lib: establish Zircon libc++ and KTL foundation

1 files changed, 2183 insertions, 0 deletions

diff --git a/third_party/libcxx/include/c++/v1/map b/third_party/libcxx/include/c++/v1/map
new file mode 100644
index 0000000..b7031ae
--- /dev/null
+++ b/third_party/libcxx/include/c++/v1/map
@@ -0,0 +1,2183 @@
+// -*- 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 <__algorithm/specialized_algorithms.h>
+#  include <__assert>
+#  include <__config>
+#  include <__functional/binary_function.h>
+#  include <__functional/is_transparent.h>
+#  include <__functional/operations.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/compressed_pair.h>
+#  include <__memory/pointer_traits.h>
+#  include <__memory/unique_ptr.h>
+#  include <__memory_resource/polymorphic_allocator.h>
+#  include <__node_handle>
+#  include <__ranges/access.h>
+#  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/make_transparent.h>
+#  include <__type_traits/remove_const.h>
+#  include <__type_traits/type_identity.h>
+#  include <__utility/forward.h>
+#  include <__utility/lazy_synth_three_way_comparator.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>
+class __map_value_compare {
+  _LIBCPP_COMPRESSED_ELEMENT(_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.first, __y.first); }
+  _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _Key& __y) const { return __comp_(__x.first, __y); }
+  _LIBCPP_HIDE_FROM_ABI bool operator()(const _Key& __x, const _CP& __y) const { return __comp_(__x, __y.first); }
+  _LIBCPP_HIDE_FROM_ABI 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.first);
+  }
+
+  template <typename _K2>
+  _LIBCPP_HIDE_FROM_ABI bool operator()(const _CP& __x, const _K2& __y) const {
+    return __comp_(__x.first, __y);
+  }
+#  endif
+};
+
+template <class _Key, class _MapValueT, class _Compare>
+struct __make_transparent<_Key, __map_value_compare<_Key, _MapValueT, _Compare> > {
+  using type _LIBCPP_NODEBUG = __map_value_compare<_Key, _MapValueT, __make_transparent_t<_Key, _Compare> >;
+};
+
+#  if _LIBCPP_STD_VER >= 14
+template <class _MapValueT, class _Key, class _Compare>
+struct __lazy_synth_three_way_comparator<__map_value_compare<_Key, _MapValueT, _Compare>, _MapValueT, _MapValueT> {
+  __lazy_synth_three_way_comparator<_Compare, _Key, _Key> __comp_;
+
+  __lazy_synth_three_way_comparator(
+      _LIBCPP_CTOR_LIFETIMEBOUND const __map_value_compare<_Key, _MapValueT, _Compare>& __comp)
+      : __comp_(__comp.key_comp()) {}
+
+  _LIBCPP_HIDE_FROM_ABI auto
+  operator()(_LIBCPP_LIFETIMEBOUND const _MapValueT& __lhs, _LIBCPP_LIFETIMEBOUND const _MapValueT& __rhs) const {
+    return __comp_(__lhs.first, __rhs.first);
+  }
+};
+
+template <class _MapValueT, class _Key, class _TransparentKey, class _Compare>
+struct __lazy_synth_three_way_comparator<__map_value_compare<_Key, _MapValueT, _Compare>, _TransparentKey, _MapValueT> {
+  __lazy_synth_three_way_comparator<_Compare, _TransparentKey, _Key> __comp_;
+
+  __lazy_synth_three_way_comparator(
+      _LIBCPP_CTOR_LIFETIMEBOUND const __map_value_compare<_Key, _MapValueT, _Compare>& __comp)
+      : __comp_(__comp.key_comp()) {}
+
+  _LIBCPP_HIDE_FROM_ABI auto
+  operator()(_LIBCPP_LIFETIMEBOUND const _TransparentKey& __lhs, _LIBCPP_LIFETIMEBOUND const _MapValueT& __rhs) const {
+    return __comp_(__lhs, __rhs.first);
+  }
+};
+
+template <class _MapValueT, class _Key, class _TransparentKey, class _Compare>
+struct __lazy_synth_three_way_comparator<__map_value_compare<_Key, _MapValueT, _Compare>, _MapValueT, _TransparentKey> {
+  __lazy_synth_three_way_comparator<_Compare, _Key, _TransparentKey> __comp_;
+
+  __lazy_synth_three_way_comparator(
+      _LIBCPP_CTOR_LIFETIMEBOUND const __map_value_compare<_Key, _MapValueT, _Compare>& __comp)
+      : __comp_(__comp.key_comp()) {}
+
+  _LIBCPP_HIDE_FROM_ABI auto
+  operator()(_LIBCPP_LIFETIMEBOUND const _MapValueT& __lhs, _LIBCPP_LIFETIMEBOUND const _TransparentKey& __rhs) const {
+    return __comp_(__lhs.first, __rhs);
+  }
+};
+#  endif // _LIBCPP_STD_VER >= 14
+
+template <class _Key, class _CP, class _Compare>
+inline _LIBCPP_HIDE_FROM_ABI void
+swap(__map_value_compare<_Key, _CP, _Compare>& __x, __map_value_compare<_Key, _CP, _Compare>& __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->__get_value().second));
+    if (__first_constructed)
+      __alloc_traits::destroy(__na_, std::addressof(__p->__get_value().first));
+    if (__p)
+      __alloc_traits::deallocate(__na_, __p, 1);
+  }
+};
+
+template <class _Key, class _Tp>
+struct __value_type;
+
+template <class _TreeIterator>
+class __map_iterator {
+  _TreeIterator __i_;
+
+public:
+  using iterator_category = bidirectional_iterator_tag;
+  using value_type        = typename _TreeIterator::value_type;
+  using difference_type   = typename _TreeIterator::difference_type;
+  using reference         = value_type&;
+  using pointer           = typename _TreeIterator::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_; }
+  _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return pointer_traits<pointer>::pointer_to(*__i_); }
+
+  _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, class...>
+  friend struct __specialized_algorithm;
+};
+
+#  ifndef _LIBCPP_CXX03_LANG
+template <class _Alg, class _TreeIterator>
+struct __specialized_algorithm<_Alg, __iterator_pair<__map_iterator<_TreeIterator>, __map_iterator<_TreeIterator>>> {
+  using __base _LIBCPP_NODEBUG = __specialized_algorithm<_Alg, __iterator_pair<_TreeIterator, _TreeIterator>>;
+
+  static const bool __has_algorithm = __base::__has_algorithm;
+
+  using __iterator _LIBCPP_NODEBUG = __map_iterator<_TreeIterator>;
+
+  template <class... _Args>
+  _LIBCPP_HIDE_FROM_ABI static void operator()(__iterator __first, __iterator __last, _Args&&... __args) {
+    __base()(__first.__i_, __last.__i_, std::forward<_Args>(__args)...);
+  }
+};
+#  endif
+
+template <class _TreeIterator>
+class __map_const_iterator {
+  _TreeIterator __i_;
+
+public:
+  using iterator_category = bidirectional_iterator_tag;
+  using value_type        = typename _TreeIterator::value_type;
+  using difference_type   = typename _TreeIterator::difference_type;
+  using reference         = const value_type&;
+  using pointer           = typename _TreeIterator::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_; }
+  _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return pointer_traits<pointer>::pointer_to(*__i_); }
+
+  _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, class...>
+  friend struct __specialized_algorithm;
+};
+
+#  ifndef _LIBCPP_CXX03_LANG
+template <class _Alg, class _TreeIterator>
+struct __specialized_algorithm<
+    _Alg,
+    __iterator_pair<__map_const_iterator<_TreeIterator>, __map_const_iterator<_TreeIterator>>> {
+  using __base _LIBCPP_NODEBUG = __specialized_algorithm<_Alg, __iterator_pair<_TreeIterator, _TreeIterator>>;
+
+  static const bool __has_algorithm = __base::__has_algorithm;
+
+  using __iterator _LIBCPP_NODEBUG = __map_const_iterator<_TreeIterator>;
+
+  template <class... _Args>
+  _LIBCPP_HIDE_FROM_ABI static void operator()(__iterator __first, __iterator __last, _Args&&... __args) {
+    __base()(__first.__i_, __last.__i_, std::forward<_Args>(__args)...);
+  }
+};
+#  endif
+
+template <class _Key, class _Tp, class _Compare = less<_Key>, class _Allocator = allocator<pair<const _Key, _Tp> > >
+class multimap;
+
+template <class _Key, class _Tp, class _Compare = less<_Key>, class _Allocator = allocator<pair<const _Key, _Tp> > >
+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 __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) = default;
+
+  _LIBCPP_HIDE_FROM_ABI map& operator=(const map& __m) = default;
+
+#  ifndef _LIBCPP_CXX03_LANG
+
+  _LIBCPP_HIDE_FROM_ABI map(map&& __m) = default;
+
+  _LIBCPP_HIDE_FROM_ABI map(map&& __m, const allocator_type& __a) : __tree_(std::move(__m.__tree_), __a) {}
+
+  _LIBCPP_HIDE_FROM_ABI map& operator=(map&& __m) = default;
+
+  _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) {
+    clear();
+    insert(__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& __alloc) : __tree_(__m.__tree_, __alloc) {}
+
+  _LIBCPP_HIDE_FROM_ABI ~map() { static_assert(sizeof(std::__diagnose_non_const_comparator<_Key, _Compare>()), ""); }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT { return __tree_.begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return __tree_.begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT { return __tree_.end(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return __tree_.end(); }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI reverse_iterator rbegin() _NOEXCEPT { return reverse_iterator(end()); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rbegin() const _NOEXCEPT {
+    return const_reverse_iterator(end());
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI reverse_iterator rend() _NOEXCEPT { return reverse_iterator(begin()); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rend() const _NOEXCEPT {
+    return const_reverse_iterator(begin());
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator cbegin() const _NOEXCEPT { return begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator cend() const _NOEXCEPT { return end(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crbegin() const _NOEXCEPT { return rbegin(); }
+  [[__nodiscard__]] _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; }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI size_type size() const _NOEXCEPT { return __tree_.size(); }
+  [[__nodiscard__]] _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
+
+  template <class _Arg,
+            __enable_if_t<__is_transparently_comparable_v<_Compare, key_type, __remove_cvref_t<_Arg> >, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI mapped_type& at(_Arg&& __arg) {
+    auto [_, __child] = __tree_.__find_equal(__arg);
+    if (__child == nullptr)
+      std::__throw_out_of_range("map::at:  key not found");
+    return static_cast<__node_pointer>(__child)->__get_value().second;
+  }
+
+  template <class _Arg,
+            __enable_if_t<__is_transparently_comparable_v<_Compare, key_type, __remove_cvref_t<_Arg> >, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const mapped_type& at(_Arg&& __arg) const {
+    auto [_, __child] = __tree_.__find_equal(__arg);
+    if (__child == nullptr)
+      std::__throw_out_of_range("map::at:  key not found");
+    return static_cast<__node_pointer>(__child)->__get_value().second;
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI mapped_type& at(const key_type& __k);
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const mapped_type& at(const key_type& __k) const;
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT {
+    return allocator_type(__tree_.__alloc());
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp().key_comp(); }
+  [[__nodiscard__]] _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)...).first;
+  }
+
+  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_.__emplace_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_.__emplace_hint_unique(__pos.__i_, std::forward<_Pp>(__p)).first;
+  }
+
+#  endif // _LIBCPP_CXX03_LANG
+
+  _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert(const value_type& __v) { return __tree_.__emplace_unique(__v); }
+
+  _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, const value_type& __v) {
+    return __tree_.__emplace_hint_unique(__p.__i_, __v).first;
+  }
+
+#  ifndef _LIBCPP_CXX03_LANG
+  _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert(value_type&& __v) {
+    return __tree_.__emplace_unique(std::move(__v));
+  }
+
+  _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, value_type&& __v) {
+    return __tree_.__emplace_hint_unique(__p.__i_, std::move(__v)).first;
+  }
+
+  _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 __first, _InputIterator __last) {
+    __tree_.__insert_range_unique(__first, __last);
+  }
+
+#  if _LIBCPP_STD_VER >= 23
+  template <_ContainerCompatibleRange<value_type> _Range>
+  _LIBCPP_HIDE_FROM_ABI void insert_range(_Range&& __range) {
+    __tree_.__insert_range_unique(ranges::begin(__range), ranges::end(__range));
+  }
+#  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(
+        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(
+        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(
+            __h.__i_,
+            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(
+            __h.__i_,
+            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) {
+    auto __result              = __tree_.__emplace_unique(__k, std::forward<_Vp>(__v));
+    auto& [__iter, __inserted] = __result;
+    if (!__inserted)
+      __iter->second = std::forward<_Vp>(__v);
+    return __result;
+  }
+
+  template <class _Vp>
+  _LIBCPP_HIDE_FROM_ABI pair<iterator, bool> insert_or_assign(key_type&& __k, _Vp&& __v) {
+    auto __result              = __tree_.__emplace_unique(std::move(__k), std::forward<_Vp>(__v));
+    auto& [__iter, __inserted] = __result;
+    if (!__inserted)
+      __iter->second = std::forward<_Vp>(__v);
+    return __result;
+  }
+
+  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(__h.__i_, __k, std::forward<_Vp>(__v));
+
+    if (!__inserted)
+      __r->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(__h.__i_, std::move(__k), std::forward<_Vp>(__v));
+
+    if (!__inserted)
+      __r->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));
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI node_type extract(key_type const& __key) {
+    return __tree_.template __node_handle_extract<node_type>(__key);
+  }
+  [[__nodiscard__]] _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_); }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator find(const key_type& __k) { return __tree_.find(__k); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator find(const key_type& __k) const { return __tree_.find(__k); }
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator find(const _K2& __k) {
+    return __tree_.find(__k);
+  }
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator find(const _K2& __k) const {
+    return __tree_.find(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _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, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI size_type count(const _K2& __k) const {
+    return __tree_.__count_multi(__k);
+  }
+#  endif
+
+#  if _LIBCPP_STD_VER >= 20
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool contains(const key_type& __k) const { return find(__k) != end(); }
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool contains(const _K2& __k) const {
+    return find(__k) != end();
+  }
+#  endif // _LIBCPP_STD_VER >= 20
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const key_type& __k) {
+    return __tree_.__lower_bound_unique(__k);
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const key_type& __k) const {
+    return __tree_.__lower_bound_unique(__k);
+  }
+
+  // The transparent versions of the lookup functions use the _multi version, since a non-element key is allowed to
+  // match multiple elements.
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const _K2& __k) {
+    return __tree_.__lower_bound_multi(__k);
+  }
+
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const _K2& __k) const {
+    return __tree_.__lower_bound_multi(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const key_type& __k) {
+    return __tree_.__upper_bound_unique(__k);
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const key_type& __k) const {
+    return __tree_.__upper_bound_unique(__k);
+  }
+
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const _K2& __k) {
+    return __tree_.__upper_bound_multi(__k);
+  }
+  template <typename _K2,
+            class _Comp = _Compare,
+            enable_if_t<__is_transparent_v<_Comp> || __is_transparently_comparable_v<_Comp, key_type, _K2>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const _K2& __k) const {
+    return __tree_.__upper_bound_multi(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const key_type& __k) {
+    return __tree_.__equal_range_unique(__k);
+  }
+  [[__nodiscard__]] _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, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const _K2& __k) {
+    return __tree_.__equal_range_multi(__k);
+  }
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _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 __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
+
+  friend struct __specialized_algorithm<_Algorithm::__for_each, __single_range<map> >;
+};
+
+#  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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Allocator>>>
+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_v<_Allocator>>>
+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_v<_Allocator>>>
+map(initializer_list<pair<_Key, _Tp>>, _Allocator)
+    -> map<remove_const_t<_Key>, _Tp, less<remove_const_t<_Key>>, _Allocator>;
+#  endif
+
+#  if _LIBCPP_STD_VER >= 14
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+struct __specialized_algorithm<_Algorithm::__for_each, __single_range<map<_Key, _Tp, _Compare, _Allocator>>> {
+  using __map _LIBCPP_NODEBUG = map<_Key, _Tp, _Compare, _Allocator>;
+
+  static const bool __has_algorithm = true;
+
+  template <class _Map, class _Func, class _Proj>
+  _LIBCPP_HIDE_FROM_ABI static auto operator()(_Map&& __map, _Func __func, _Proj __proj) {
+    auto [_, __func2] = __specialized_algorithm<_Algorithm::__for_each, __single_range<typename __map::__base>>()(
+        __map.__tree_, std::move(__func), std::move(__proj));
+    return std::make_pair(__map.end(), std::move(__func2));
+  }
+};
+#  endif
+
+#  ifndef _LIBCPP_CXX03_LANG
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+_Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](const key_type& __k) {
+  return __tree_.__emplace_unique(std::piecewise_construct, std::forward_as_tuple(__k), std::forward_as_tuple())
+      .first->second;
+}
+
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+_Tp& map<_Key, _Tp, _Compare, _Allocator>::operator[](key_type&& __k) {
+  return __tree_
+      .__emplace_unique(std::piecewise_construct, std::forward_as_tuple(std::move(__k)), std::forward_as_tuple())
+      .first->second;
+}
+
+#  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->__get_value().first), __k);
+  __h.get_deleter().__first_constructed = true;
+  __node_traits::construct(__na, std::addressof(__h->__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) {
+  auto [__parent, __child] = __tree_.__find_equal(__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->__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) {
+  auto [_, __child] = __tree_.__find_equal(__k);
+  if (__child == nullptr)
+    std::__throw_out_of_range("map::at:  key not found");
+  return static_cast<__node_pointer>(__child)->__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 {
+  auto [_, __child] = __tree_.__find_equal(__k);
+  if (__child == nullptr)
+    std::__throw_out_of_range("map::at:  key not found");
+  return static_cast<__node_pointer>(__child)->__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;
+
+  static _LIBCPP_CONSTEXPR const bool __reservable = false;
+};
+
+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 __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) = default;
+
+  _LIBCPP_HIDE_FROM_ABI multimap& operator=(const multimap& __m) = default;
+
+#  ifndef _LIBCPP_CXX03_LANG
+
+  _LIBCPP_HIDE_FROM_ABI multimap(multimap&& __m) = default;
+
+  _LIBCPP_HIDE_FROM_ABI multimap(multimap&& __m, const allocator_type& __a) : __tree_(std::move(__m.__tree_), __a) {}
+
+  _LIBCPP_HIDE_FROM_ABI multimap& operator=(multimap&& __m) = default;
+
+  _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) {
+    clear();
+    insert(__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_, __a) {}
+
+  _LIBCPP_HIDE_FROM_ABI ~multimap() {
+    static_assert(sizeof(std::__diagnose_non_const_comparator<_Key, _Compare>()), "");
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator begin() _NOEXCEPT { return __tree_.begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator begin() const _NOEXCEPT { return __tree_.begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator end() _NOEXCEPT { return __tree_.end(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator end() const _NOEXCEPT { return __tree_.end(); }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI reverse_iterator rbegin() _NOEXCEPT { return reverse_iterator(end()); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rbegin() const _NOEXCEPT {
+    return const_reverse_iterator(end());
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI reverse_iterator rend() _NOEXCEPT { return reverse_iterator(begin()); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator rend() const _NOEXCEPT {
+    return const_reverse_iterator(begin());
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator cbegin() const _NOEXCEPT { return begin(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator cend() const _NOEXCEPT { return end(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_reverse_iterator crbegin() const _NOEXCEPT { return rbegin(); }
+  [[__nodiscard__]] _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; }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI size_type size() const _NOEXCEPT { return __tree_.size(); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI size_type max_size() const _NOEXCEPT { return __tree_.max_size(); }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT {
+    return allocator_type(__tree_.__alloc());
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp().key_comp(); }
+  [[__nodiscard__]] _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_.__emplace_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_.__emplace_hint_multi(__pos.__i_, std::forward<_Pp>(__p));
+  }
+
+  _LIBCPP_HIDE_FROM_ABI iterator insert(value_type&& __v) { return __tree_.__emplace_multi(std::move(__v)); }
+
+  _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, value_type&& __v) {
+    return __tree_.__emplace_hint_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_.__emplace_multi(__v); }
+
+  _LIBCPP_HIDE_FROM_ABI iterator insert(const_iterator __p, const value_type& __v) {
+    return __tree_.__emplace_hint_multi(__p.__i_, __v);
+  }
+
+  template <class _InputIterator>
+  _LIBCPP_HIDE_FROM_ABI void insert(_InputIterator __f, _InputIterator __l) {
+    __tree_.__insert_range_multi(__f, __l);
+  }
+
+#  if _LIBCPP_STD_VER >= 23
+  template <_ContainerCompatibleRange<value_type> _Range>
+  _LIBCPP_HIDE_FROM_ABI void insert_range(_Range&& __range) {
+    __tree_.__insert_range_multi(ranges::begin(__range), ranges::end(__range));
+  }
+#  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));
+  }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI node_type extract(key_type const& __key) {
+    return __tree_.template __node_handle_extract<node_type>(__key);
+  }
+  [[__nodiscard__]] _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_);
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator find(const key_type& __k) { return __tree_.find(__k); }
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator find(const key_type& __k) const { return __tree_.find(__k); }
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator find(const _K2& __k) {
+    return __tree_.find(__k);
+  }
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator find(const _K2& __k) const {
+    return __tree_.find(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _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, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI size_type count(const _K2& __k) const {
+    return __tree_.__count_multi(__k);
+  }
+#  endif
+
+#  if _LIBCPP_STD_VER >= 20
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool contains(const key_type& __k) const { return find(__k) != end(); }
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI bool contains(const _K2& __k) const {
+    return find(__k) != end();
+  }
+#  endif // _LIBCPP_STD_VER >= 20
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const key_type& __k) {
+    return __tree_.__lower_bound_multi(__k);
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const key_type& __k) const {
+    return __tree_.__lower_bound_multi(__k);
+  }
+
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator lower_bound(const _K2& __k) {
+    return __tree_.__lower_bound_multi(__k);
+  }
+
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator lower_bound(const _K2& __k) const {
+    return __tree_.__lower_bound_multi(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const key_type& __k) {
+    return __tree_.__upper_bound_multi(__k);
+  }
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const key_type& __k) const {
+    return __tree_.__upper_bound_multi(__k);
+  }
+
+#  if _LIBCPP_STD_VER >= 14
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI iterator upper_bound(const _K2& __k) {
+    return __tree_.__upper_bound_multi(__k);
+  }
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI const_iterator upper_bound(const _K2& __k) const {
+    return __tree_.__upper_bound_multi(__k);
+  }
+#  endif
+
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const key_type& __k) {
+    return __tree_.__equal_range_multi(__k);
+  }
+  [[__nodiscard__]] _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, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI pair<iterator, iterator> equal_range(const _K2& __k) {
+    return __tree_.__equal_range_multi(__k);
+  }
+  template <typename _K2, class _Comp = _Compare, enable_if_t<__is_transparent_v<_Comp>, int> = 0>
+  [[__nodiscard__]] _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;
+
+  friend struct __specialized_algorithm<_Algorithm::__for_each, __single_range<multimap> >;
+};
+
+#  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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Compare>>,
+          class            = enable_if_t<__is_allocator_v<_Allocator>>>
+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_v<_Allocator>>>
+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_v<_Allocator>>>
+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_v<_Allocator>>>
+multimap(initializer_list<pair<_Key, _Tp>>, _Allocator)
+    -> multimap<remove_const_t<_Key>, _Tp, less<remove_const_t<_Key>>, _Allocator>;
+#  endif
+
+#  if _LIBCPP_STD_VER >= 14
+template <class _Key, class _Tp, class _Compare, class _Allocator>
+struct __specialized_algorithm<_Algorithm::__for_each, __single_range<multimap<_Key, _Tp, _Compare, _Allocator>>> {
+  using __map _LIBCPP_NODEBUG = multimap<_Key, _Tp, _Compare, _Allocator>;
+
+  static const bool __has_algorithm = true;
+
+  template <class _Map, class _Func, class _Proj>
+  _LIBCPP_HIDE_FROM_ABI static auto operator()(_Map&& __map, _Func __func, _Proj __proj) {
+    auto [_, __func2] = __specialized_algorithm<_Algorithm::__for_each, __single_range<typename __map::__base>>()(
+        __map.__tree_, std::move(__func), std::move(__proj));
+    return std::make_pair(__map.end(), std::move(__func2));
+  }
+};
+#  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;
+
+  static _LIBCPP_CONSTEXPR const bool __reservable = false;
+};
+
+_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