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-rw-r--r--third_party/libcxx/include/c++/v1/set1554
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diff --git a/third_party/libcxx/include/c++/v1/set b/third_party/libcxx/include/c++/v1/set
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+++ b/third_party/libcxx/include/c++/v1/set
@@ -0,0 +1,1554 @@
+// -*- 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_SET
+#define _LIBCPP_SET
+
+/*
+
+ set synopsis
+
+namespace std
+{
+
+template <class Key, class Compare = less<Key>,
+ class Allocator = allocator<Key>>
+class set
+{
+public:
+ // types:
+ typedef Key key_type;
+ typedef key_type value_type;
+ typedef Compare key_compare;
+ typedef key_compare value_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
+ typedef INSERT_RETURN_TYPE<iterator, node_type> insert_return_type; // C++17
+
+ // construct/copy/destroy:
+ set()
+ noexcept(
+ is_nothrow_default_constructible<allocator_type>::value &&
+ is_nothrow_default_constructible<key_compare>::value &&
+ is_nothrow_copy_constructible<key_compare>::value);
+ explicit set(const value_compare& comp);
+ set(const value_compare& comp, const allocator_type& a);
+ template <class InputIterator>
+ set(InputIterator first, InputIterator last,
+ const value_compare& comp = value_compare());
+ template <class InputIterator>
+ set(InputIterator first, InputIterator last, const value_compare& comp,
+ const allocator_type& a);
+ template<container-compatible-range<value_type> R>
+ set(from_range_t, R&& rg, const Compare& comp = Compare(), const Allocator& = Allocator()); // C++23
+ set(const set& s);
+ set(set&& s)
+ noexcept(
+ is_nothrow_move_constructible<allocator_type>::value &&
+ is_nothrow_move_constructible<key_compare>::value);
+ explicit set(const allocator_type& a);
+ set(const set& s, const allocator_type& a);
+ set(set&& s, const allocator_type& a);
+ set(initializer_list<value_type> il, const value_compare& comp = value_compare());
+ set(initializer_list<value_type> il, const value_compare& comp,
+ const allocator_type& a);
+ template <class InputIterator>
+ set(InputIterator first, InputIterator last, const allocator_type& a)
+ : set(first, last, Compare(), a) {} // C++14
+ template<container-compatible-range<value_type> R>
+ set(from_range_t, R&& rg, const Allocator& a))
+ : set(from_range, std::forward<R>(rg), Compare(), a) { } // C++23
+ set(initializer_list<value_type> il, const allocator_type& a)
+ : set(il, Compare(), a) {} // C++14
+ ~set();
+
+ set& operator=(const set& s);
+ set& operator=(set&& s)
+ noexcept(
+ allocator_type::propagate_on_container_move_assignment::value &&
+ is_nothrow_move_assignable<allocator_type>::value &&
+ is_nothrow_move_assignable<key_compare>::value);
+ set& 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>
+ 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);
+ iterator insert(const_iterator position, const value_type& v);
+ iterator insert(const_iterator position, value_type&& v);
+ 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
+
+ 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(set<Key, C2, Allocator>& source); // C++17
+ template<class C2>
+ void merge(set<Key, C2, Allocator>&& source); // C++17
+ template<class C2>
+ void merge(multiset<Key, C2, Allocator>& source); // C++17
+ template<class C2>
+ void merge(multiset<Key, C2, Allocator>&& source); // C++17
+
+ void swap(set& s)
+ noexcept(
+ __is_nothrow_swappable<key_compare>::value &&
+ (!allocator_type::propagate_on_container_swap::value ||
+ __is_nothrow_swappable<allocator_type>::value));
+
+ // observers:
+ allocator_type get_allocator() const noexcept;
+ key_compare key_comp() const;
+ value_compare value_comp() const;
+
+ // set operations:
+ iterator find(const key_type& k);
+ const_iterator find(const key_type& k) const;
+ template<typename K>
+ iterator find(const K& x);
+ 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<typename iterator_traits<InputIterator>::value_type>,
+ class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
+set(InputIterator, InputIterator,
+ Compare = Compare(), Allocator = Allocator())
+ -> set<typename iterator_traits<InputIterator>::value_type, Compare, Allocator>; // C++17
+
+template<ranges::input_range R, class Compare = less<ranges::range_value_t<R>>,
+ class Allocator = allocator<ranges::range_value_t<R>>>
+ set(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
+ -> set<ranges::range_value_t<R>, Compare, Allocator>; // C++23
+
+template<class Key, class Compare = less<Key>, class Allocator = allocator<Key>>
+set(initializer_list<Key>, Compare = Compare(), Allocator = Allocator())
+ -> set<Key, Compare, Allocator>; // C++17
+
+template<class InputIterator, class Allocator>
+set(InputIterator, InputIterator, Allocator)
+ -> set<typename iterator_traits<InputIterator>::value_type,
+ less<typename iterator_traits<InputIterator>::value_type>, Allocator>; // C++17
+
+template<ranges::input_range R, class Allocator>
+ set(from_range_t, R&&, Allocator)
+ -> set<ranges::range_value_t<R>, less<ranges::range_value_t<R>>, Allocator>; // C++23
+
+template<class Key, class Allocator>
+set(initializer_list<Key>, Allocator) -> set<Key, less<Key>, Allocator>; // C++17
+
+template <class Key, class Compare, class Allocator>
+bool
+operator==(const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y);
+
+template <class Key, class Compare, class Allocator>
+bool
+operator< (const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator!=(const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator> (const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator>=(const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator<=(const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // removed in C++20
+
+template<class Key, class Compare, class Allocator>
+ synth-three-way-result<Key> operator<=>(const set<Key, Compare, Allocator>& x,
+ const set<Key, Compare, Allocator>& y); // since C++20
+
+// specialized algorithms:
+template <class Key, class Compare, class Allocator>
+void
+swap(set<Key, Compare, Allocator>& x, set<Key, Compare, Allocator>& y)
+ noexcept(noexcept(x.swap(y)));
+
+template <class Key, class Compare, class Allocator, class Predicate>
+typename set<Key, Compare, Allocator>::size_type
+erase_if(set<Key, Compare, Allocator>& c, Predicate pred); // C++20
+
+template <class Key, class Compare = less<Key>,
+ class Allocator = allocator<Key>>
+class multiset
+{
+public:
+ // types:
+ typedef Key key_type;
+ typedef key_type value_type;
+ typedef Compare key_compare;
+ typedef key_compare value_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
+
+ // construct/copy/destroy:
+ multiset()
+ noexcept(
+ is_nothrow_default_constructible<allocator_type>::value &&
+ is_nothrow_default_constructible<key_compare>::value &&
+ is_nothrow_copy_constructible<key_compare>::value);
+ explicit multiset(const value_compare& comp);
+ multiset(const value_compare& comp, const allocator_type& a);
+ template <class InputIterator>
+ multiset(InputIterator first, InputIterator last,
+ const value_compare& comp = value_compare());
+ template <class InputIterator>
+ multiset(InputIterator first, InputIterator last,
+ const value_compare& comp, const allocator_type& a);
+ template<container-compatible-range<value_type> R>
+ multiset(from_range_t, R&& rg,
+ const Compare& comp = Compare(), const Allocator& = Allocator()); // C++23
+ multiset(const multiset& s);
+ multiset(multiset&& s)
+ noexcept(
+ is_nothrow_move_constructible<allocator_type>::value &&
+ is_nothrow_move_constructible<key_compare>::value);
+ explicit multiset(const allocator_type& a);
+ multiset(const multiset& s, const allocator_type& a);
+ multiset(multiset&& s, const allocator_type& a);
+ multiset(initializer_list<value_type> il, const value_compare& comp = value_compare());
+ multiset(initializer_list<value_type> il, const value_compare& comp,
+ const allocator_type& a);
+ template <class InputIterator>
+ multiset(InputIterator first, InputIterator last, const allocator_type& a)
+ : set(first, last, Compare(), a) {} // C++14
+ template<container-compatible-range<value_type> R>
+ multiset(from_range_t, R&& rg, const Allocator& a))
+ : multiset(from_range, std::forward<R>(rg), Compare(), a) { } // C++23
+ multiset(initializer_list<value_type> il, const allocator_type& a)
+ : set(il, Compare(), a) {} // C++14
+ ~multiset();
+
+ multiset& operator=(const multiset& s);
+ multiset& operator=(multiset&& s)
+ noexcept(
+ allocator_type::propagate_on_container_move_assignment::value &&
+ is_nothrow_move_assignable<allocator_type>::value &&
+ is_nothrow_move_assignable<key_compare>::value);
+ multiset& 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);
+ iterator insert(const_iterator position, const value_type& v);
+ iterator insert(const_iterator position, value_type&& v);
+ 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(multiset<Key, C2, Allocator>& source); // C++17
+ template<class C2>
+ void merge(multiset<Key, C2, Allocator>&& source); // C++17
+ template<class C2>
+ void merge(set<Key, C2, Allocator>& source); // C++17
+ template<class C2>
+ void merge(set<Key, C2, Allocator>&& source); // C++17
+
+ void swap(multiset& s)
+ noexcept(
+ __is_nothrow_swappable<key_compare>::value &&
+ (!allocator_type::propagate_on_container_swap::value ||
+ __is_nothrow_swappable<allocator_type>::value));
+
+ // observers:
+ allocator_type get_allocator() const noexcept;
+ key_compare key_comp() const;
+ value_compare value_comp() const;
+
+ // set operations:
+ iterator find(const key_type& k);
+ const_iterator find(const key_type& k) const;
+ template<typename K>
+ iterator find(const K& x);
+ 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<typename iterator_traits<InputIterator>::value_type>,
+ class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
+multiset(InputIterator, InputIterator,
+ Compare = Compare(), Allocator = Allocator())
+ -> multiset<typename iterator_traits<InputIterator>::value_type, Compare, Allocator>; // C++17
+
+template<ranges::input_range R, class Compare = less<ranges::range_value_t<R>>,
+ class Allocator = allocator<ranges::range_value_t<R>>>
+ multiset(from_range_t, R&&, Compare = Compare(), Allocator = Allocator())
+ -> multiset<ranges::range_value_t<R>, Compare, Allocator>;
+
+template<class Key, class Compare = less<Key>, class Allocator = allocator<Key>>
+multiset(initializer_list<Key>, Compare = Compare(), Allocator = Allocator())
+ -> multiset<Key, Compare, Allocator>; // C++17
+
+template<class InputIterator, class Allocator>
+multiset(InputIterator, InputIterator, Allocator)
+ -> multiset<typename iterator_traits<InputIterator>::value_type,
+ less<typename iterator_traits<InputIterator>::value_type>, Allocator>; // C++17
+
+template<ranges::input_range R, class Allocator>
+ multiset(from_range_t, R&&, Allocator)
+ -> multiset<ranges::range_value_t<R>, less<ranges::range_value_t<R>>, Allocator>;
+
+template<class Key, class Allocator>
+multiset(initializer_list<Key>, Allocator) -> multiset<Key, less<Key>, Allocator>; // C++17
+
+template <class Key, class Compare, class Allocator>
+bool
+operator==(const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y);
+
+template <class Key, class Compare, class Allocator>
+bool
+operator< (const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator!=(const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator> (const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator>=(const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // removed in C++20
+
+template <class Key, class Compare, class Allocator>
+bool
+operator<=(const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // removed in C++20
+
+template<class Key, class Compare, class Allocator>
+ synth-three-way-result<Key> operator<=>(const multiset<Key, Compare, Allocator>& x,
+ const multiset<Key, Compare, Allocator>& y); // since C++20
+
+// specialized algorithms:
+template <class Key, class Compare, class Allocator>
+void
+swap(multiset<Key, Compare, Allocator>& x, multiset<Key, Compare, Allocator>& y)
+ noexcept(noexcept(x.swap(y)));
+
+template <class Key, class Compare, class Allocator, class Predicate>
+typename multiset<Key, Compare, Allocator>::size_type
+erase_if(multiset<Key, Compare, Allocator>& c, Predicate pred); // C++20
+
+} // std
+
+*/
+
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+# include <__cxx03/set>
+#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/is_transparent.h>
+# include <__functional/operations.h>
+# include <__iterator/erase_if_container.h>
+# include <__iterator/iterator_traits.h>
+# include <__iterator/reverse_iterator.h>
+# include <__memory/allocator.h>
+# include <__memory/allocator_traits.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/enable_if.h>
+# include <__type_traits/is_allocator.h>
+# include <__type_traits/is_nothrow_constructible.h>
+# include <__type_traits/is_same.h>
+# include <__type_traits/is_swappable.h>
+# include <__type_traits/type_identity.h>
+# include <__utility/forward.h>
+# include <__utility/move.h>
+# include <__utility/pair.h>
+# 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.set.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 _Compare = less<_Key>, class _Allocator = allocator<_Key> >
+class multiset;
+
+template <class _Key, class _Compare = less<_Key>, class _Allocator = allocator<_Key> >
+class set {
+public:
+ // types:
+ typedef _Key key_type;
+ typedef key_type value_type;
+ typedef __type_identity_t<_Compare> key_compare;
+ typedef key_compare value_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");
+
+private:
+ typedef __tree<value_type, value_compare, allocator_type> __base;
+ typedef allocator_traits<allocator_type> __alloc_traits;
+
+ static_assert(__check_valid_allocator<allocator_type>::value, "");
+
+ __base __tree_;
+
+public:
+ typedef typename __base::pointer pointer;
+ typedef typename __base::const_pointer const_pointer;
+ typedef typename __base::size_type size_type;
+ typedef typename __base::difference_type difference_type;
+ typedef typename __base::const_iterator iterator;
+ typedef 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 __set_node_handle<typename __base::__node, allocator_type> node_type;
+ typedef __insert_return_type<iterator, node_type> insert_return_type;
+# endif
+
+ template <class _Key2, class _Compare2, class _Alloc2>
+ friend class set;
+ template <class _Key2, class _Compare2, class _Alloc2>
+ friend class multiset;
+
+ _LIBCPP_HIDE_FROM_ABI set() _NOEXCEPT_(
+ is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_default_constructible<key_compare>::value&&
+ is_nothrow_copy_constructible<key_compare>::value)
+ : __tree_(value_compare()) {}
+
+ _LIBCPP_HIDE_FROM_ABI explicit set(const value_compare& __comp) _NOEXCEPT_(
+ is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_copy_constructible<key_compare>::value)
+ : __tree_(__comp) {}
+
+ _LIBCPP_HIDE_FROM_ABI explicit set(const value_compare& __comp, const allocator_type& __a) : __tree_(__comp, __a) {}
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI set(_InputIterator __f, _InputIterator __l, const value_compare& __comp = value_compare())
+ : __tree_(__comp) {
+ insert(__f, __l);
+ }
+
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI
+ set(_InputIterator __f, _InputIterator __l, const value_compare& __comp, const allocator_type& __a)
+ : __tree_(__comp, __a) {
+ insert(__f, __l);
+ }
+
+# if _LIBCPP_STD_VER >= 23
+ template <_ContainerCompatibleRange<value_type> _Range>
+ _LIBCPP_HIDE_FROM_ABI
+ set(from_range_t,
+ _Range&& __range,
+ const key_compare& __comp = key_compare(),
+ const allocator_type& __a = allocator_type())
+ : __tree_(__comp, __a) {
+ insert_range(std::forward<_Range>(__range));
+ }
+# endif
+
+# if _LIBCPP_STD_VER >= 14
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI set(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
+ : set(__f, __l, key_compare(), __a) {}
+# endif
+
+# if _LIBCPP_STD_VER >= 23
+ template <_ContainerCompatibleRange<value_type> _Range>
+ _LIBCPP_HIDE_FROM_ABI set(from_range_t, _Range&& __range, const allocator_type& __a)
+ : set(from_range, std::forward<_Range>(__range), key_compare(), __a) {}
+# endif
+
+ _LIBCPP_HIDE_FROM_ABI set(const set& __s) = default;
+
+ _LIBCPP_HIDE_FROM_ABI set& operator=(const set& __s) = default;
+
+# ifndef _LIBCPP_CXX03_LANG
+ _LIBCPP_HIDE_FROM_ABI set(set&& __s) = default;
+# endif // _LIBCPP_CXX03_LANG
+
+ _LIBCPP_HIDE_FROM_ABI explicit set(const allocator_type& __a) : __tree_(__a) {}
+
+ _LIBCPP_HIDE_FROM_ABI set(const set& __s, const allocator_type& __alloc) : __tree_(__s.__tree_, __alloc) {}
+
+# ifndef _LIBCPP_CXX03_LANG
+ _LIBCPP_HIDE_FROM_ABI set(set&& __s, const allocator_type& __alloc) : __tree_(std::move(__s.__tree_), __alloc) {}
+
+ _LIBCPP_HIDE_FROM_ABI set(initializer_list<value_type> __il, const value_compare& __comp = value_compare())
+ : __tree_(__comp) {
+ insert(__il.begin(), __il.end());
+ }
+
+ _LIBCPP_HIDE_FROM_ABI set(initializer_list<value_type> __il, const value_compare& __comp, const allocator_type& __a)
+ : __tree_(__comp, __a) {
+ insert(__il.begin(), __il.end());
+ }
+
+# if _LIBCPP_STD_VER >= 14
+ _LIBCPP_HIDE_FROM_ABI set(initializer_list<value_type> __il, const allocator_type& __a)
+ : set(__il, key_compare(), __a) {}
+# endif
+
+ _LIBCPP_HIDE_FROM_ABI set& operator=(initializer_list<value_type> __il) {
+ clear();
+ insert(__il.begin(), __il.end());
+ return *this;
+ }
+
+ _LIBCPP_HIDE_FROM_ABI set& operator=(set&& __s) = default;
+# endif // _LIBCPP_CXX03_LANG
+
+ _LIBCPP_HIDE_FROM_ABI ~set() { 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(); }
+
+ // modifiers:
+# 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, std::forward<_Args>(__args)...).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, __v).first;
+ }
+
+ 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
+
+# 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, std::move(__v)).first;
+ }
+
+ _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 erase(const_iterator __p) { return __tree_.erase(__p); }
+ _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, __l); }
+ _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 set::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 set::insert()");
+ return __tree_.template __node_handle_insert_unique<node_type>(__hint, 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);
+ }
+ template <class _Compare2>
+ _LIBCPP_HIDE_FROM_ABI void merge(set<key_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(set<key_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(multiset<key_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(multiset<key_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(set& __s) _NOEXCEPT_(__is_nothrow_swappable_v<__base>) { __tree_.swap(__s.__tree_); }
+
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT { return __tree_.__alloc(); }
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp(); }
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI value_compare value_comp() const { return __tree_.value_comp(); }
+
+ // set operations:
+ [[__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_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>, 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>, 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_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>, 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_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
+
+ template <class, class...>
+ friend struct __specialized_algorithm;
+};
+
+# if _LIBCPP_STD_VER >= 17
+template <class _InputIterator,
+ class _Compare = less<__iterator_value_type<_InputIterator>>,
+ class _Allocator = allocator<__iterator_value_type<_InputIterator>>,
+ class = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>>
+set(_InputIterator, _InputIterator, _Compare = _Compare(), _Allocator = _Allocator())
+ -> set<__iterator_value_type<_InputIterator>, _Compare, _Allocator>;
+
+# if _LIBCPP_STD_VER >= 23
+template <ranges::input_range _Range,
+ class _Compare = less<ranges::range_value_t<_Range>>,
+ class _Allocator = allocator<ranges::range_value_t<_Range>>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>>
+set(from_range_t, _Range&&, _Compare = _Compare(), _Allocator = _Allocator())
+ -> set<ranges::range_value_t<_Range>, _Compare, _Allocator>;
+# endif
+
+template <class _Key,
+ class _Compare = less<_Key>,
+ class _Allocator = allocator<_Key>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>>
+set(initializer_list<_Key>, _Compare = _Compare(), _Allocator = _Allocator()) -> set<_Key, _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>>>
+set(_InputIterator, _InputIterator, _Allocator)
+ -> set<__iterator_value_type<_InputIterator>, less<__iterator_value_type<_InputIterator>>, _Allocator>;
+
+# if _LIBCPP_STD_VER >= 23
+template <ranges::input_range _Range, class _Allocator, class = enable_if_t<__is_allocator_v<_Allocator>>>
+set(from_range_t, _Range&&, _Allocator)
+ -> set<ranges::range_value_t<_Range>, less<ranges::range_value_t<_Range>>, _Allocator>;
+# endif
+
+template <class _Key, class _Allocator, class = enable_if_t<__is_allocator_v<_Allocator>>>
+set(initializer_list<_Key>, _Allocator) -> set<_Key, less<_Key>, _Allocator>;
+# endif
+
+# if _LIBCPP_STD_VER >= 14
+template <class _Alg, class _Key, class _Compare, class _Allocator>
+struct __specialized_algorithm<_Alg, __single_range<set<_Key, _Compare, _Allocator>>> {
+ using __set _LIBCPP_NODEBUG = set<_Key, _Compare, _Allocator>;
+
+ static const bool __has_algorithm =
+ __specialized_algorithm<_Alg, __single_range<typename __set::__base>>::__has_algorithm;
+
+ // set's begin() and end() are identical with and without const qualification
+ template <class... _Args>
+ _LIBCPP_HIDE_FROM_ABI static auto operator()(const __set& __set, _Args&&... __args) {
+ return __specialized_algorithm<_Alg, __single_range<typename __set::__base>>()(
+ __set.__tree_, std::forward<_Args>(__args)...);
+ }
+};
+# endif
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator==(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _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 _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator<(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return std::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator!=(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return !(__x == __y);
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator>(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return __y < __x;
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator>=(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return !(__x < __y);
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator<=(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return !(__y < __x);
+}
+
+# else // _LIBCPP_STD_VER <= 17
+
+template <class _Key, class _Compare, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<_Key>
+operator<=>(const set<_Key, _Compare, _Allocator>& __x, const set<_Key, _Compare, _Allocator>& __y) {
+ return std::lexicographical_compare_three_way(__x.begin(), __x.end(), __y.begin(), __y.end(), std::__synth_three_way);
+}
+
+# endif // _LIBCPP_STD_VER <= 17
+
+// specialized algorithms:
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI void swap(set<_Key, _Compare, _Allocator>& __x, set<_Key, _Compare, _Allocator>& __y)
+ _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y))) {
+ __x.swap(__y);
+}
+
+# if _LIBCPP_STD_VER >= 20
+template <class _Key, class _Compare, class _Allocator, class _Predicate>
+inline _LIBCPP_HIDE_FROM_ABI typename set<_Key, _Compare, _Allocator>::size_type
+erase_if(set<_Key, _Compare, _Allocator>& __c, _Predicate __pred) {
+ return std::__libcpp_erase_if_container(__c, __pred);
+}
+# endif
+
+template <class _Key, class _Compare, class _Allocator>
+struct __container_traits<set<_Key, _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 _Compare, class _Allocator>
+class multiset {
+public:
+ // types:
+ typedef _Key key_type;
+ typedef key_type value_type;
+ typedef __type_identity_t<_Compare> key_compare;
+ typedef key_compare value_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");
+
+private:
+ typedef __tree<value_type, value_compare, allocator_type> __base;
+ typedef allocator_traits<allocator_type> __alloc_traits;
+
+ static_assert(__check_valid_allocator<allocator_type>::value, "");
+
+ __base __tree_;
+
+public:
+ typedef typename __base::pointer pointer;
+ typedef typename __base::const_pointer const_pointer;
+ typedef typename __base::size_type size_type;
+ typedef typename __base::difference_type difference_type;
+ typedef typename __base::const_iterator iterator;
+ typedef 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 __set_node_handle<typename __base::__node, allocator_type> node_type;
+# endif
+
+ template <class _Key2, class _Compare2, class _Alloc2>
+ friend class set;
+ template <class _Key2, class _Compare2, class _Alloc2>
+ friend class multiset;
+
+ // construct/copy/destroy:
+ _LIBCPP_HIDE_FROM_ABI multiset() _NOEXCEPT_(
+ is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_default_constructible<key_compare>::value&&
+ is_nothrow_copy_constructible<key_compare>::value)
+ : __tree_(value_compare()) {}
+
+ _LIBCPP_HIDE_FROM_ABI explicit multiset(const value_compare& __comp) _NOEXCEPT_(
+ is_nothrow_default_constructible<allocator_type>::value&& is_nothrow_copy_constructible<key_compare>::value)
+ : __tree_(__comp) {}
+
+ _LIBCPP_HIDE_FROM_ABI explicit multiset(const value_compare& __comp, const allocator_type& __a)
+ : __tree_(__comp, __a) {}
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI multiset(_InputIterator __f, _InputIterator __l, const value_compare& __comp = value_compare())
+ : __tree_(__comp) {
+ insert(__f, __l);
+ }
+
+# if _LIBCPP_STD_VER >= 14
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI multiset(_InputIterator __f, _InputIterator __l, const allocator_type& __a)
+ : multiset(__f, __l, key_compare(), __a) {}
+# endif
+
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI
+ multiset(_InputIterator __f, _InputIterator __l, const value_compare& __comp, const allocator_type& __a)
+ : __tree_(__comp, __a) {
+ insert(__f, __l);
+ }
+
+# if _LIBCPP_STD_VER >= 23
+ template <_ContainerCompatibleRange<value_type> _Range>
+ _LIBCPP_HIDE_FROM_ABI
+ multiset(from_range_t,
+ _Range&& __range,
+ const key_compare& __comp = key_compare(),
+ const allocator_type& __a = allocator_type())
+ : __tree_(__comp, __a) {
+ insert_range(std::forward<_Range>(__range));
+ }
+
+ template <_ContainerCompatibleRange<value_type> _Range>
+ _LIBCPP_HIDE_FROM_ABI multiset(from_range_t, _Range&& __range, const allocator_type& __a)
+ : multiset(from_range, std::forward<_Range>(__range), key_compare(), __a) {}
+# endif
+
+ _LIBCPP_HIDE_FROM_ABI multiset(const multiset& __s) = default;
+
+ _LIBCPP_HIDE_FROM_ABI multiset& operator=(const multiset& __s) = default;
+
+# ifndef _LIBCPP_CXX03_LANG
+ _LIBCPP_HIDE_FROM_ABI multiset(multiset&& __s) = default;
+
+ _LIBCPP_HIDE_FROM_ABI multiset(multiset&& __s, const allocator_type& __a) : __tree_(std::move(__s.__tree_), __a) {}
+# endif // _LIBCPP_CXX03_LANG
+ _LIBCPP_HIDE_FROM_ABI explicit multiset(const allocator_type& __a) : __tree_(__a) {}
+ _LIBCPP_HIDE_FROM_ABI multiset(const multiset& __s, const allocator_type& __a) : __tree_(__s.__tree_, __a) {}
+
+# ifndef _LIBCPP_CXX03_LANG
+ _LIBCPP_HIDE_FROM_ABI multiset(initializer_list<value_type> __il, const value_compare& __comp = value_compare())
+ : __tree_(__comp) {
+ insert(__il.begin(), __il.end());
+ }
+
+ _LIBCPP_HIDE_FROM_ABI
+ multiset(initializer_list<value_type> __il, const value_compare& __comp, const allocator_type& __a)
+ : __tree_(__comp, __a) {
+ insert(__il.begin(), __il.end());
+ }
+
+# if _LIBCPP_STD_VER >= 14
+ _LIBCPP_HIDE_FROM_ABI multiset(initializer_list<value_type> __il, const allocator_type& __a)
+ : multiset(__il, key_compare(), __a) {}
+# endif
+
+ _LIBCPP_HIDE_FROM_ABI multiset& operator=(initializer_list<value_type> __il) {
+ clear();
+ insert(__il.begin(), __il.end());
+ return *this;
+ }
+
+ _LIBCPP_HIDE_FROM_ABI multiset& operator=(multiset&& __s) = default;
+# endif // _LIBCPP_CXX03_LANG
+
+ _LIBCPP_HIDE_FROM_ABI ~multiset() {
+ 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(); }
+
+ // modifiers:
+# 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, std::forward<_Args>(__args)...);
+ }
+# 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, __v);
+ }
+
+ template <class _InputIterator>
+ _LIBCPP_HIDE_FROM_ABI void insert(_InputIterator __first, _InputIterator __last) {
+ __tree_.__insert_range_multi(__first, __last);
+ }
+
+# 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
+
+# ifndef _LIBCPP_CXX03_LANG
+ _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, 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 erase(const_iterator __p) { return __tree_.erase(__p); }
+ _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, __l); }
+ _LIBCPP_HIDE_FROM_ABI void clear() _NOEXCEPT { __tree_.clear(); }
+
+# 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 multiset::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 multiset::insert()");
+ return __tree_.template __node_handle_insert_multi<node_type>(__hint, 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);
+ }
+ template <class _Compare2>
+ _LIBCPP_HIDE_FROM_ABI void merge(multiset<key_type, _Compare2, allocator_type>& __source) {
+ _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(
+ __source.get_allocator() == get_allocator(), "merging container with incompatible allocator");
+ __tree_.__node_handle_merge_multi(__source.__tree_);
+ }
+ template <class _Compare2>
+ _LIBCPP_HIDE_FROM_ABI void merge(multiset<key_type, _Compare2, allocator_type>&& __source) {
+ _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(
+ __source.get_allocator() == get_allocator(), "merging container with incompatible allocator");
+ __tree_.__node_handle_merge_multi(__source.__tree_);
+ }
+ template <class _Compare2>
+ _LIBCPP_HIDE_FROM_ABI void merge(set<key_type, _Compare2, allocator_type>& __source) {
+ _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(
+ __source.get_allocator() == get_allocator(), "merging container with incompatible allocator");
+ __tree_.__node_handle_merge_multi(__source.__tree_);
+ }
+ template <class _Compare2>
+ _LIBCPP_HIDE_FROM_ABI void merge(set<key_type, _Compare2, allocator_type>&& __source) {
+ _LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR(
+ __source.get_allocator() == get_allocator(), "merging container with incompatible allocator");
+ __tree_.__node_handle_merge_multi(__source.__tree_);
+ }
+# endif
+
+ _LIBCPP_HIDE_FROM_ABI void swap(multiset& __s) _NOEXCEPT_(__is_nothrow_swappable_v<__base>) {
+ __tree_.swap(__s.__tree_);
+ }
+
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI allocator_type get_allocator() const _NOEXCEPT { return __tree_.__alloc(); }
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI key_compare key_comp() const { return __tree_.value_comp(); }
+ [[__nodiscard__]] _LIBCPP_HIDE_FROM_ABI value_compare value_comp() const { return __tree_.value_comp(); }
+
+ // set operations:
+ [[__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
+
+ template <class, class...>
+ friend struct __specialized_algorithm;
+};
+
+# if _LIBCPP_STD_VER >= 17
+template <class _InputIterator,
+ class _Compare = less<__iterator_value_type<_InputIterator>>,
+ class _Allocator = allocator<__iterator_value_type<_InputIterator>>,
+ class = enable_if_t<__has_input_iterator_category<_InputIterator>::value, void>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>>
+multiset(_InputIterator, _InputIterator, _Compare = _Compare(), _Allocator = _Allocator())
+ -> multiset<__iterator_value_type<_InputIterator>, _Compare, _Allocator>;
+
+# if _LIBCPP_STD_VER >= 23
+template <ranges::input_range _Range,
+ class _Compare = less<ranges::range_value_t<_Range>>,
+ class _Allocator = allocator<ranges::range_value_t<_Range>>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>>
+multiset(from_range_t, _Range&&, _Compare = _Compare(), _Allocator = _Allocator())
+ -> multiset<ranges::range_value_t<_Range>, _Compare, _Allocator>;
+# endif
+
+template <class _Key,
+ class _Compare = less<_Key>,
+ class _Allocator = allocator<_Key>,
+ class = enable_if_t<__is_allocator_v<_Allocator>>,
+ class = enable_if_t<!__is_allocator_v<_Compare>>>
+multiset(initializer_list<_Key>, _Compare = _Compare(), _Allocator = _Allocator())
+ -> multiset<_Key, _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>>>
+multiset(_InputIterator, _InputIterator, _Allocator)
+ -> multiset<__iterator_value_type<_InputIterator>, less<__iterator_value_type<_InputIterator>>, _Allocator>;
+
+# if _LIBCPP_STD_VER >= 23
+template <ranges::input_range _Range, class _Allocator, class = enable_if_t<__is_allocator_v<_Allocator>>>
+multiset(from_range_t, _Range&&, _Allocator)
+ -> multiset<ranges::range_value_t<_Range>, less<ranges::range_value_t<_Range>>, _Allocator>;
+# endif
+
+template <class _Key, class _Allocator, class = enable_if_t<__is_allocator_v<_Allocator>>>
+multiset(initializer_list<_Key>, _Allocator) -> multiset<_Key, less<_Key>, _Allocator>;
+# endif
+
+# if _LIBCPP_STD_VER >= 14
+template <class _Alg, class _Key, class _Compare, class _Allocator>
+struct __specialized_algorithm<_Alg, __single_range<multiset<_Key, _Compare, _Allocator>>> {
+ using __set _LIBCPP_NODEBUG = multiset<_Key, _Compare, _Allocator>;
+
+ static const bool __has_algorithm =
+ __specialized_algorithm<_Alg, __single_range<typename __set::__base>>::__has_algorithm;
+
+ // set's begin() and end() are identical with and without const qualification
+ template <class... _Args>
+ _LIBCPP_HIDE_FROM_ABI static auto operator()(const __set& __set, _Args&&... __args) {
+ return __specialized_algorithm<_Alg, __single_range<typename __set::__base>>()(
+ __set.__tree_, std::forward<_Args>(__args)...);
+ }
+};
+# endif
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator==(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _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 _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator<(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return std::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator!=(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return !(__x == __y);
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator>(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return __y < __x;
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator>=(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return !(__x < __y);
+}
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI bool
+operator<=(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return !(__y < __x);
+}
+
+# else // _LIBCPP_STD_VER <= 17
+
+template <class _Key, class _Compare, class _Allocator>
+_LIBCPP_HIDE_FROM_ABI __synth_three_way_result<_Key>
+operator<=>(const multiset<_Key, _Compare, _Allocator>& __x, const multiset<_Key, _Compare, _Allocator>& __y) {
+ return std::lexicographical_compare_three_way(__x.begin(), __x.end(), __y.begin(), __y.end(), __synth_three_way);
+}
+
+# endif // _LIBCPP_STD_VER <= 17
+
+template <class _Key, class _Compare, class _Allocator>
+inline _LIBCPP_HIDE_FROM_ABI void
+swap(multiset<_Key, _Compare, _Allocator>& __x, multiset<_Key, _Compare, _Allocator>& __y)
+ _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y))) {
+ __x.swap(__y);
+}
+
+# if _LIBCPP_STD_VER >= 20
+template <class _Key, class _Compare, class _Allocator, class _Predicate>
+inline _LIBCPP_HIDE_FROM_ABI typename multiset<_Key, _Compare, _Allocator>::size_type
+erase_if(multiset<_Key, _Compare, _Allocator>& __c, _Predicate __pred) {
+ return std::__libcpp_erase_if_container(__c, __pred);
+}
+# endif
+
+template <class _Key, class _Compare, class _Allocator>
+struct __container_traits<multiset<_Key, _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 _CompareT = std::less<_KeyT>>
+using set _LIBCPP_AVAILABILITY_PMR = std::set<_KeyT, _CompareT, polymorphic_allocator<_KeyT>>;
+
+template <class _KeyT, class _CompareT = std::less<_KeyT>>
+using multiset _LIBCPP_AVAILABILITY_PMR = std::multiset<_KeyT, _CompareT, polymorphic_allocator<_KeyT>>;
+} // 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 <stdexcept>
+# include <type_traits>
+# endif
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
+#endif // _LIBCPP_SET