Restoring authorship annotation for Andrey Khalyavin <halyavin@gmail.com>. Commit 2 of 2.

1 files changed, 655 insertions, 655 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/ext/hash_set b/contrib/libs/cxxsupp/libcxx/include/ext/hash_set
index ccea1b4cde..af3f9c5de0 100644
--- a/contrib/libs/cxxsupp/libcxx/include/ext/hash_set
+++ b/contrib/libs/cxxsupp/libcxx/include/ext/hash_set
@@ -1,659 +1,659 @@
-// -*- C++ -*- 
-//===------------------------- hash_set ------------------------------------===// 
-// 
+// -*- C++ -*-
+//===------------------------- hash_set ------------------------------------===//
+//
 // 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_HASH_SET 
-#define _LIBCPP_HASH_SET 
- 
-/* 
- 
-    hash_set synopsis 
- 
-namespace __gnu_cxx 
-{ 
- 
-template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>, 
-          class Alloc = allocator<Value>> 
-class hash_set 
-{ 
-public: 
-    // types 
-    typedef Value                                                      key_type; 
-    typedef key_type                                                   value_type; 
-    typedef Hash                                                       hasher; 
-    typedef Pred                                                       key_equal; 
-    typedef Alloc                                                      allocator_type; 
-    typedef value_type&                                                reference; 
-    typedef const value_type&                                          const_reference; 
-    typedef typename allocator_traits<allocator_type>::pointer         pointer; 
-    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer; 
-    typedef typename allocator_traits<allocator_type>::size_type       size_type; 
-    typedef typename allocator_traits<allocator_type>::difference_type difference_type; 
- 
-    typedef /unspecified/ iterator; 
-    typedef /unspecified/ const_iterator; 
- 
-    explicit hash_set(size_type n = 193, const hasher& hf = hasher(), 
-                           const key_equal& eql = key_equal(), 
-                           const allocator_type& a = allocator_type()); 
-    template <class InputIterator> 
-        hash_set(InputIterator f, InputIterator l, 
-                      size_type n = 193, const hasher& hf = hasher(), 
-                      const key_equal& eql = key_equal(), 
-                      const allocator_type& a = allocator_type()); 
-    hash_set(const hash_set&); 
-    ~hash_set(); 
-    hash_set& operator=(const hash_set&); 
- 
-    allocator_type get_allocator() const; 
- 
-    bool      empty() const; 
-    size_type size() const; 
-    size_type max_size() const; 
- 
-    iterator       begin(); 
-    iterator       end(); 
-    const_iterator begin()  const; 
-    const_iterator end()    const; 
- 
-    pair<iterator, bool> insert(const value_type& obj); 
-    template <class InputIterator> 
-        void insert(InputIterator first, InputIterator last); 
- 
-    void erase(const_iterator position); 
-    size_type erase(const key_type& k); 
-    void erase(const_iterator first, const_iterator last); 
-    void clear(); 
- 
-    void swap(hash_set&); 
- 
-    hasher hash_funct() const; 
-    key_equal key_eq() const; 
- 
-    iterator       find(const key_type& k); 
-    const_iterator find(const key_type& k) const; 
-    size_type count(const key_type& k) const; 
-    pair<iterator, iterator>             equal_range(const key_type& k); 
-    pair<const_iterator, const_iterator> equal_range(const key_type& k) const; 
- 
-    size_type bucket_count() const; 
-    size_type max_bucket_count() const; 
- 
-    size_type elems_in_bucket(size_type n) const; 
- 
-    void resize(size_type n); 
-}; 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    void swap(hash_set<Value, Hash, Pred, Alloc>& x, 
-              hash_set<Value, Hash, Pred, Alloc>& y); 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    bool 
-    operator==(const hash_set<Value, Hash, Pred, Alloc>& x, 
-               const hash_set<Value, Hash, Pred, Alloc>& y); 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    bool 
-    operator!=(const hash_set<Value, Hash, Pred, Alloc>& x, 
-               const hash_set<Value, Hash, Pred, Alloc>& y); 
- 
-template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>, 
-          class Alloc = allocator<Value>> 
-class hash_multiset 
-{ 
-public: 
-    // types 
-    typedef Value                                                      key_type; 
-    typedef key_type                                                   value_type; 
-    typedef Hash                                                       hasher; 
-    typedef Pred                                                       key_equal; 
-    typedef Alloc                                                      allocator_type; 
-    typedef value_type&                                                reference; 
-    typedef const value_type&                                          const_reference; 
-    typedef typename allocator_traits<allocator_type>::pointer         pointer; 
-    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer; 
-    typedef typename allocator_traits<allocator_type>::size_type       size_type; 
-    typedef typename allocator_traits<allocator_type>::difference_type difference_type; 
- 
-    typedef /unspecified/ iterator; 
-    typedef /unspecified/ const_iterator; 
- 
-    explicit hash_multiset(size_type n = 193, const hasher& hf = hasher(), 
-                           const key_equal& eql = key_equal(), 
-                           const allocator_type& a = allocator_type()); 
-    template <class InputIterator> 
-        hash_multiset(InputIterator f, InputIterator l, 
-                      size_type n = 193, const hasher& hf = hasher(), 
-                      const key_equal& eql = key_equal(), 
-                      const allocator_type& a = allocator_type()); 
-    hash_multiset(const hash_multiset&); 
-    ~hash_multiset(); 
-    hash_multiset& operator=(const hash_multiset&); 
- 
-    allocator_type get_allocator() const; 
- 
-    bool      empty() const; 
-    size_type size() const; 
-    size_type max_size() const; 
- 
-    iterator       begin(); 
-    iterator       end(); 
-    const_iterator begin()  const; 
-    const_iterator end()    const; 
- 
-    iterator insert(const value_type& obj); 
-    template <class InputIterator> 
-        void insert(InputIterator first, InputIterator last); 
- 
-    void erase(const_iterator position); 
-    size_type erase(const key_type& k); 
-    void erase(const_iterator first, const_iterator last); 
-    void clear(); 
- 
-    void swap(hash_multiset&); 
- 
-    hasher hash_funct() const; 
-    key_equal key_eq() const; 
- 
-    iterator       find(const key_type& k); 
-    const_iterator find(const key_type& k) const; 
-    size_type count(const key_type& k) const; 
-    pair<iterator, iterator>             equal_range(const key_type& k); 
-    pair<const_iterator, const_iterator> equal_range(const key_type& k) const; 
- 
-    size_type bucket_count() const; 
-    size_type max_bucket_count() const; 
- 
-    size_type elems_in_bucket(size_type n) const; 
- 
-    void resize(size_type n); 
-}; 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    void swap(hash_multiset<Value, Hash, Pred, Alloc>& x, 
-              hash_multiset<Value, Hash, Pred, Alloc>& y); 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    bool 
-    operator==(const hash_multiset<Value, Hash, Pred, Alloc>& x, 
-               const hash_multiset<Value, Hash, Pred, Alloc>& y); 
- 
-template <class Value, class Hash, class Pred, class Alloc> 
-    bool 
-    operator!=(const hash_multiset<Value, Hash, Pred, Alloc>& x, 
-               const hash_multiset<Value, Hash, Pred, Alloc>& y); 
-}  // __gnu_cxx 
- 
-*/ 
- 
-#include <__config> 
-#include <__hash_table> 
-#include <functional> 
-#include <ext/__hash> 
- 
-#if defined(__DEPRECATED) && __DEPRECATED 
-#if defined(_LIBCPP_WARNING) 
-    _LIBCPP_WARNING("Use of the header <ext/hash_set> is deprecated.  Migrate to <unordered_set>") 
-#else 
-#   warning Use of the header <ext/hash_set> is deprecated.  Migrate to <unordered_set> 
-#endif 
-#endif 
- 
-namespace __gnu_cxx { 
- 
- 
-template <class _Value, class _Hash = hash<_Value>, class _Pred = std::equal_to<_Value>, 
-          class _Alloc = std::allocator<_Value> > 
-class _LIBCPP_TEMPLATE_VIS hash_set 
-{ 
-public: 
-    // types 
-    typedef _Value                                                     key_type; 
-    typedef key_type                                                   value_type; 
-    typedef _Hash                                                      hasher; 
-    typedef _Pred                                                      key_equal; 
-    typedef _Alloc                                                     allocator_type; 
-    typedef value_type&                                                reference; 
-    typedef const value_type&                                          const_reference; 
- 
-private: 
-    typedef std::__hash_table<value_type, hasher, key_equal, allocator_type> __table; 
- 
-    __table __table_; 
- 
-public: 
-    typedef typename __table::pointer         pointer; 
-    typedef typename __table::const_pointer   const_pointer; 
-    typedef typename __table::size_type       size_type; 
-    typedef typename __table::difference_type difference_type; 
- 
-    typedef typename __table::const_iterator       iterator; 
-    typedef typename __table::const_iterator       const_iterator; 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    hash_set() { } 
-    explicit hash_set(size_type __n, const hasher& __hf = hasher(), 
-                           const key_equal& __eql = key_equal()); 
-    hash_set(size_type __n, const hasher& __hf, const key_equal& __eql, 
-                  const allocator_type& __a); 
-    template <class _InputIterator> 
-        hash_set(_InputIterator __first, _InputIterator __last); 
-    template <class _InputIterator> 
-        hash_set(_InputIterator __first, _InputIterator __last, 
-                      size_type __n, const hasher& __hf = hasher(), 
-                      const key_equal& __eql = key_equal()); 
-    template <class _InputIterator> 
-        hash_set(_InputIterator __first, _InputIterator __last, 
-                      size_type __n, const hasher& __hf, const key_equal& __eql, 
-                      const allocator_type& __a); 
-    hash_set(const hash_set& __u); 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    allocator_type get_allocator() const 
-        {return allocator_type(__table_.__node_alloc());} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    bool      empty() const {return __table_.size() == 0;} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type size() const  {return __table_.size();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type max_size() const {return __table_.max_size();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       begin()        {return __table_.begin();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       end()          {return __table_.end();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator begin()  const {return __table_.begin();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator end()    const {return __table_.end();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    std::pair<iterator, bool> insert(const value_type& __x) 
-        {return __table_.__insert_unique(__x);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator insert(const_iterator, const value_type& __x) {return insert(__x).first;} 
-    template <class _InputIterator> 
-        _LIBCPP_INLINE_VISIBILITY 
-        void insert(_InputIterator __first, _InputIterator __last); 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void erase(const_iterator __p) {__table_.erase(__p);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type erase(const key_type& __k) {return __table_.__erase_unique(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    void erase(const_iterator __first, const_iterator __last) 
-        {__table_.erase(__first, __last);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    void clear() {__table_.clear();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void swap(hash_set& __u) {__table_.swap(__u.__table_);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    hasher hash_funct() const {return __table_.hash_function();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    key_equal key_eq() const {return __table_.key_eq();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       find(const key_type& __k)       {return __table_.find(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator find(const key_type& __k) const {return __table_.find(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type count(const key_type& __k) const {return __table_.__count_unique(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    std::pair<iterator, iterator>             equal_range(const key_type& __k) 
-        {return __table_.__equal_range_unique(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    std::pair<const_iterator, const_iterator> equal_range(const key_type& __k) const 
-        {return __table_.__equal_range_unique(__k);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type bucket_count() const {return __table_.bucket_count();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type max_bucket_count() const {return __table_.max_bucket_count();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type elems_in_bucket(size_type __n) const {return __table_.bucket_size(__n);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void resize(size_type __n) {__table_.rehash(__n);} 
-}; 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(size_type __n, 
-        const hasher& __hf, const key_equal& __eql) 
-    : __table_(__hf, __eql) 
-{ 
-    __table_.rehash(__n); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(size_type __n, 
-        const hasher& __hf, const key_equal& __eql, const allocator_type& __a) 
-    : __table_(__hf, __eql, __a) 
-{ 
-    __table_.rehash(__n); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set( 
-        _InputIterator __first, _InputIterator __last) 
-{ 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set( 
-        _InputIterator __first, _InputIterator __last, size_type __n, 
-        const hasher& __hf, const key_equal& __eql) 
-    : __table_(__hf, __eql) 
-{ 
-    __table_.rehash(__n); 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set( 
-        _InputIterator __first, _InputIterator __last, size_type __n, 
-        const hasher& __hf, const key_equal& __eql, const allocator_type& __a) 
-    : __table_(__hf, __eql, __a) 
-{ 
-    __table_.rehash(__n); 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set( 
-        const hash_set& __u) 
-    : __table_(__u.__table_) 
-{ 
-    __table_.rehash(__u.bucket_count()); 
-    insert(__u.begin(), __u.end()); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-inline 
-void 
-hash_set<_Value, _Hash, _Pred, _Alloc>::insert(_InputIterator __first, 
-                                                    _InputIterator __last) 
-{ 
-    for (; __first != __last; ++__first) 
-        __table_.__insert_unique(*__first); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-inline _LIBCPP_INLINE_VISIBILITY 
-void 
-swap(hash_set<_Value, _Hash, _Pred, _Alloc>& __x, 
-     hash_set<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    __x.swap(__y); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-bool 
-operator==(const hash_set<_Value, _Hash, _Pred, _Alloc>& __x, 
-           const hash_set<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    if (__x.size() != __y.size()) 
-        return false; 
-    typedef typename hash_set<_Value, _Hash, _Pred, _Alloc>::const_iterator 
-                                                                 const_iterator; 
-    for (const_iterator __i = __x.begin(), __ex = __x.end(), __ey = __y.end(); 
-            __i != __ex; ++__i) 
-    { 
-        const_iterator __j = __y.find(*__i); 
-        if (__j == __ey || !(*__i == *__j)) 
-            return false; 
-    } 
-    return true; 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-inline _LIBCPP_INLINE_VISIBILITY 
-bool 
-operator!=(const hash_set<_Value, _Hash, _Pred, _Alloc>& __x, 
-           const hash_set<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    return !(__x == __y); 
-} 
- 
-template <class _Value, class _Hash = hash<_Value>, class _Pred = std::equal_to<_Value>, 
-          class _Alloc = std::allocator<_Value> > 
-class _LIBCPP_TEMPLATE_VIS hash_multiset 
-{ 
-public: 
-    // types 
-    typedef _Value                                                     key_type; 
-    typedef key_type                                                   value_type; 
-    typedef _Hash                                                      hasher; 
-    typedef _Pred                                                      key_equal; 
-    typedef _Alloc                                                     allocator_type; 
-    typedef value_type&                                                reference; 
-    typedef const value_type&                                          const_reference; 
- 
-private: 
-    typedef std::__hash_table<value_type, hasher, key_equal, allocator_type> __table; 
- 
-    __table __table_; 
- 
-public: 
-    typedef typename __table::pointer         pointer; 
-    typedef typename __table::const_pointer   const_pointer; 
-    typedef typename __table::size_type       size_type; 
-    typedef typename __table::difference_type difference_type; 
- 
-    typedef typename __table::const_iterator       iterator; 
-    typedef typename __table::const_iterator       const_iterator; 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    hash_multiset() { } 
-    explicit hash_multiset(size_type __n, const hasher& __hf = hasher(), 
-                                const key_equal& __eql = key_equal()); 
-    hash_multiset(size_type __n, const hasher& __hf, 
-                       const key_equal& __eql, const allocator_type& __a); 
-    template <class _InputIterator> 
-        hash_multiset(_InputIterator __first, _InputIterator __last); 
-    template <class _InputIterator> 
-        hash_multiset(_InputIterator __first, _InputIterator __last, 
-                      size_type __n, const hasher& __hf = hasher(), 
-                      const key_equal& __eql = key_equal()); 
-    template <class _InputIterator> 
-        hash_multiset(_InputIterator __first, _InputIterator __last, 
-                      size_type __n , const hasher& __hf, 
-                      const key_equal& __eql, const allocator_type& __a); 
-    hash_multiset(const hash_multiset& __u); 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    allocator_type get_allocator() const 
-        {return allocator_type(__table_.__node_alloc());} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    bool      empty() const {return __table_.size() == 0;} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type size() const  {return __table_.size();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type max_size() const {return __table_.max_size();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       begin()        {return __table_.begin();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       end()          {return __table_.end();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator begin()  const {return __table_.begin();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator end()    const {return __table_.end();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator insert(const value_type& __x) {return __table_.__insert_multi(__x);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator insert(const_iterator, const value_type& __x) {return insert(__x);} 
-    template <class _InputIterator> 
-        _LIBCPP_INLINE_VISIBILITY 
-        void insert(_InputIterator __first, _InputIterator __last); 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void erase(const_iterator __p) {__table_.erase(__p);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type erase(const key_type& __k) {return __table_.__erase_multi(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    void erase(const_iterator __first, const_iterator __last) 
-        {__table_.erase(__first, __last);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    void clear() {__table_.clear();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void swap(hash_multiset& __u) {__table_.swap(__u.__table_);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    hasher hash_funct() const {return __table_.hash_function();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    key_equal key_eq() const {return __table_.key_eq();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    iterator       find(const key_type& __k)       {return __table_.find(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    const_iterator find(const key_type& __k) const {return __table_.find(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type count(const key_type& __k) const {return __table_.__count_multi(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    std::pair<iterator, iterator>             equal_range(const key_type& __k) 
-        {return __table_.__equal_range_multi(__k);} 
-    _LIBCPP_INLINE_VISIBILITY 
-    std::pair<const_iterator, const_iterator> equal_range(const key_type& __k) const 
-        {return __table_.__equal_range_multi(__k);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type bucket_count() const {return __table_.bucket_count();} 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type max_bucket_count() const {return __table_.max_bucket_count();} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    size_type elems_in_bucket(size_type __n) const {return __table_.bucket_size(__n);} 
- 
-    _LIBCPP_INLINE_VISIBILITY 
-    void resize(size_type __n) {__table_.rehash(__n);} 
-}; 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        size_type __n, const hasher& __hf, const key_equal& __eql) 
-    : __table_(__hf, __eql) 
-{ 
-    __table_.rehash(__n); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        size_type __n, const hasher& __hf, const key_equal& __eql, 
-        const allocator_type& __a) 
-    : __table_(__hf, __eql, __a) 
-{ 
-    __table_.rehash(__n); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        _InputIterator __first, _InputIterator __last) 
-{ 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        _InputIterator __first, _InputIterator __last, size_type __n, 
-        const hasher& __hf, const key_equal& __eql) 
-    : __table_(__hf, __eql) 
-{ 
-    __table_.rehash(__n); 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        _InputIterator __first, _InputIterator __last, size_type __n, 
-        const hasher& __hf, const key_equal& __eql, const allocator_type& __a) 
-    : __table_(__hf, __eql, __a) 
-{ 
-    __table_.rehash(__n); 
-    insert(__first, __last); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset( 
-        const hash_multiset& __u) 
-    : __table_(__u.__table_) 
-{ 
-    __table_.rehash(__u.bucket_count()); 
-    insert(__u.begin(), __u.end()); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-template <class _InputIterator> 
-inline 
-void 
-hash_multiset<_Value, _Hash, _Pred, _Alloc>::insert(_InputIterator __first, 
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_HASH_SET
+#define _LIBCPP_HASH_SET
+
+/*
+
+    hash_set synopsis
+
+namespace __gnu_cxx
+{
+
+template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
+          class Alloc = allocator<Value>>
+class hash_set
+{
+public:
+    // types
+    typedef Value                                                      key_type;
+    typedef key_type                                                   value_type;
+    typedef Hash                                                       hasher;
+    typedef Pred                                                       key_equal;
+    typedef Alloc                                                      allocator_type;
+    typedef value_type&                                                reference;
+    typedef const value_type&                                          const_reference;
+    typedef typename allocator_traits<allocator_type>::pointer         pointer;
+    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer;
+    typedef typename allocator_traits<allocator_type>::size_type       size_type;
+    typedef typename allocator_traits<allocator_type>::difference_type difference_type;
+
+    typedef /unspecified/ iterator;
+    typedef /unspecified/ const_iterator;
+
+    explicit hash_set(size_type n = 193, const hasher& hf = hasher(),
+                           const key_equal& eql = key_equal(),
+                           const allocator_type& a = allocator_type());
+    template <class InputIterator>
+        hash_set(InputIterator f, InputIterator l,
+                      size_type n = 193, const hasher& hf = hasher(),
+                      const key_equal& eql = key_equal(),
+                      const allocator_type& a = allocator_type());
+    hash_set(const hash_set&);
+    ~hash_set();
+    hash_set& operator=(const hash_set&);
+
+    allocator_type get_allocator() const;
+
+    bool      empty() const;
+    size_type size() const;
+    size_type max_size() const;
+
+    iterator       begin();
+    iterator       end();
+    const_iterator begin()  const;
+    const_iterator end()    const;
+
+    pair<iterator, bool> insert(const value_type& obj);
+    template <class InputIterator>
+        void insert(InputIterator first, InputIterator last);
+
+    void erase(const_iterator position);
+    size_type erase(const key_type& k);
+    void erase(const_iterator first, const_iterator last);
+    void clear();
+
+    void swap(hash_set&);
+
+    hasher hash_funct() const;
+    key_equal key_eq() const;
+
+    iterator       find(const key_type& k);
+    const_iterator find(const key_type& k) const;
+    size_type count(const key_type& k) const;
+    pair<iterator, iterator>             equal_range(const key_type& k);
+    pair<const_iterator, const_iterator> equal_range(const key_type& k) const;
+
+    size_type bucket_count() const;
+    size_type max_bucket_count() const;
+
+    size_type elems_in_bucket(size_type n) const;
+
+    void resize(size_type n);
+};
+
+template <class Value, class Hash, class Pred, class Alloc>
+    void swap(hash_set<Value, Hash, Pred, Alloc>& x,
+              hash_set<Value, Hash, Pred, Alloc>& y);
+
+template <class Value, class Hash, class Pred, class Alloc>
+    bool
+    operator==(const hash_set<Value, Hash, Pred, Alloc>& x,
+               const hash_set<Value, Hash, Pred, Alloc>& y);
+
+template <class Value, class Hash, class Pred, class Alloc>
+    bool
+    operator!=(const hash_set<Value, Hash, Pred, Alloc>& x,
+               const hash_set<Value, Hash, Pred, Alloc>& y);
+
+template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
+          class Alloc = allocator<Value>>
+class hash_multiset
+{
+public:
+    // types
+    typedef Value                                                      key_type;
+    typedef key_type                                                   value_type;
+    typedef Hash                                                       hasher;
+    typedef Pred                                                       key_equal;
+    typedef Alloc                                                      allocator_type;
+    typedef value_type&                                                reference;
+    typedef const value_type&                                          const_reference;
+    typedef typename allocator_traits<allocator_type>::pointer         pointer;
+    typedef typename allocator_traits<allocator_type>::const_pointer   const_pointer;
+    typedef typename allocator_traits<allocator_type>::size_type       size_type;
+    typedef typename allocator_traits<allocator_type>::difference_type difference_type;
+
+    typedef /unspecified/ iterator;
+    typedef /unspecified/ const_iterator;
+
+    explicit hash_multiset(size_type n = 193, const hasher& hf = hasher(),
+                           const key_equal& eql = key_equal(),
+                           const allocator_type& a = allocator_type());
+    template <class InputIterator>
+        hash_multiset(InputIterator f, InputIterator l,
+                      size_type n = 193, const hasher& hf = hasher(),
+                      const key_equal& eql = key_equal(),
+                      const allocator_type& a = allocator_type());
+    hash_multiset(const hash_multiset&);
+    ~hash_multiset();
+    hash_multiset& operator=(const hash_multiset&);
+
+    allocator_type get_allocator() const;
+
+    bool      empty() const;
+    size_type size() const;
+    size_type max_size() const;
+
+    iterator       begin();
+    iterator       end();
+    const_iterator begin()  const;
+    const_iterator end()    const;
+
+    iterator insert(const value_type& obj);
+    template <class InputIterator>
+        void insert(InputIterator first, InputIterator last);
+
+    void erase(const_iterator position);
+    size_type erase(const key_type& k);
+    void erase(const_iterator first, const_iterator last);
+    void clear();
+
+    void swap(hash_multiset&);
+
+    hasher hash_funct() const;
+    key_equal key_eq() const;
+
+    iterator       find(const key_type& k);
+    const_iterator find(const key_type& k) const;
+    size_type count(const key_type& k) const;
+    pair<iterator, iterator>             equal_range(const key_type& k);
+    pair<const_iterator, const_iterator> equal_range(const key_type& k) const;
+
+    size_type bucket_count() const;
+    size_type max_bucket_count() const;
+
+    size_type elems_in_bucket(size_type n) const;
+
+    void resize(size_type n);
+};
+
+template <class Value, class Hash, class Pred, class Alloc>
+    void swap(hash_multiset<Value, Hash, Pred, Alloc>& x,
+              hash_multiset<Value, Hash, Pred, Alloc>& y);
+
+template <class Value, class Hash, class Pred, class Alloc>
+    bool
+    operator==(const hash_multiset<Value, Hash, Pred, Alloc>& x,
+               const hash_multiset<Value, Hash, Pred, Alloc>& y);
+
+template <class Value, class Hash, class Pred, class Alloc>
+    bool
+    operator!=(const hash_multiset<Value, Hash, Pred, Alloc>& x,
+               const hash_multiset<Value, Hash, Pred, Alloc>& y);
+}  // __gnu_cxx
+
+*/
+
+#include <__config>
+#include <__hash_table>
+#include <functional>
+#include <ext/__hash>
+
+#if defined(__DEPRECATED) && __DEPRECATED
+#if defined(_LIBCPP_WARNING)
+    _LIBCPP_WARNING("Use of the header <ext/hash_set> is deprecated.  Migrate to <unordered_set>")
+#else
+#   warning Use of the header <ext/hash_set> is deprecated.  Migrate to <unordered_set>
+#endif
+#endif
+
+namespace __gnu_cxx {
+
+
+template <class _Value, class _Hash = hash<_Value>, class _Pred = std::equal_to<_Value>,
+          class _Alloc = std::allocator<_Value> >
+class _LIBCPP_TEMPLATE_VIS hash_set
+{
+public:
+    // types
+    typedef _Value                                                     key_type;
+    typedef key_type                                                   value_type;
+    typedef _Hash                                                      hasher;
+    typedef _Pred                                                      key_equal;
+    typedef _Alloc                                                     allocator_type;
+    typedef value_type&                                                reference;
+    typedef const value_type&                                          const_reference;
+
+private:
+    typedef std::__hash_table<value_type, hasher, key_equal, allocator_type> __table;
+
+    __table __table_;
+
+public:
+    typedef typename __table::pointer         pointer;
+    typedef typename __table::const_pointer   const_pointer;
+    typedef typename __table::size_type       size_type;
+    typedef typename __table::difference_type difference_type;
+
+    typedef typename __table::const_iterator       iterator;
+    typedef typename __table::const_iterator       const_iterator;
+
+    _LIBCPP_INLINE_VISIBILITY
+    hash_set() { }
+    explicit hash_set(size_type __n, const hasher& __hf = hasher(),
+                           const key_equal& __eql = key_equal());
+    hash_set(size_type __n, const hasher& __hf, const key_equal& __eql,
+                  const allocator_type& __a);
+    template <class _InputIterator>
+        hash_set(_InputIterator __first, _InputIterator __last);
+    template <class _InputIterator>
+        hash_set(_InputIterator __first, _InputIterator __last,
+                      size_type __n, const hasher& __hf = hasher(),
+                      const key_equal& __eql = key_equal());
+    template <class _InputIterator>
+        hash_set(_InputIterator __first, _InputIterator __last,
+                      size_type __n, const hasher& __hf, const key_equal& __eql,
+                      const allocator_type& __a);
+    hash_set(const hash_set& __u);
+
+    _LIBCPP_INLINE_VISIBILITY
+    allocator_type get_allocator() const
+        {return allocator_type(__table_.__node_alloc());}
+
+    _LIBCPP_INLINE_VISIBILITY
+    bool      empty() const {return __table_.size() == 0;}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type size() const  {return __table_.size();}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type max_size() const {return __table_.max_size();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       begin()        {return __table_.begin();}
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       end()          {return __table_.end();}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator begin()  const {return __table_.begin();}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator end()    const {return __table_.end();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    std::pair<iterator, bool> insert(const value_type& __x)
+        {return __table_.__insert_unique(__x);}
+    _LIBCPP_INLINE_VISIBILITY
+    iterator insert(const_iterator, const value_type& __x) {return insert(__x).first;}
+    template <class _InputIterator>
+        _LIBCPP_INLINE_VISIBILITY
+        void insert(_InputIterator __first, _InputIterator __last);
+
+    _LIBCPP_INLINE_VISIBILITY
+    void erase(const_iterator __p) {__table_.erase(__p);}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type erase(const key_type& __k) {return __table_.__erase_unique(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    void erase(const_iterator __first, const_iterator __last)
+        {__table_.erase(__first, __last);}
+    _LIBCPP_INLINE_VISIBILITY
+    void clear() {__table_.clear();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    void swap(hash_set& __u) {__table_.swap(__u.__table_);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    hasher hash_funct() const {return __table_.hash_function();}
+    _LIBCPP_INLINE_VISIBILITY
+    key_equal key_eq() const {return __table_.key_eq();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       find(const key_type& __k)       {return __table_.find(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator find(const key_type& __k) const {return __table_.find(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type count(const key_type& __k) const {return __table_.__count_unique(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    std::pair<iterator, iterator>             equal_range(const key_type& __k)
+        {return __table_.__equal_range_unique(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    std::pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
+        {return __table_.__equal_range_unique(__k);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    size_type bucket_count() const {return __table_.bucket_count();}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type max_bucket_count() const {return __table_.max_bucket_count();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    size_type elems_in_bucket(size_type __n) const {return __table_.bucket_size(__n);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    void resize(size_type __n) {__table_.rehash(__n);}
+};
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(size_type __n,
+        const hasher& __hf, const key_equal& __eql)
+    : __table_(__hf, __eql)
+{
+    __table_.rehash(__n);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(size_type __n,
+        const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
+    : __table_(__hf, __eql, __a)
+{
+    __table_.rehash(__n);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(
+        _InputIterator __first, _InputIterator __last)
+{
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(
+        _InputIterator __first, _InputIterator __last, size_type __n,
+        const hasher& __hf, const key_equal& __eql)
+    : __table_(__hf, __eql)
+{
+    __table_.rehash(__n);
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(
+        _InputIterator __first, _InputIterator __last, size_type __n,
+        const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
+    : __table_(__hf, __eql, __a)
+{
+    __table_.rehash(__n);
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_set<_Value, _Hash, _Pred, _Alloc>::hash_set(
+        const hash_set& __u)
+    : __table_(__u.__table_)
+{
+    __table_.rehash(__u.bucket_count());
+    insert(__u.begin(), __u.end());
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+inline
+void
+hash_set<_Value, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
                                                     _InputIterator __last)
-{ 
-    for (; __first != __last; ++__first) 
-        __table_.__insert_multi(*__first); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-inline _LIBCPP_INLINE_VISIBILITY 
-void 
-swap(hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x, 
-     hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    __x.swap(__y); 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-bool 
-operator==(const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x, 
-           const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    if (__x.size() != __y.size()) 
-        return false; 
-    typedef typename hash_multiset<_Value, _Hash, _Pred, _Alloc>::const_iterator 
-                                                                 const_iterator; 
-    typedef std::pair<const_iterator, const_iterator> _EqRng; 
-    for (const_iterator __i = __x.begin(), __ex = __x.end(); __i != __ex;) 
-    { 
-        _EqRng __xeq = __x.equal_range(*__i); 
-        _EqRng __yeq = __y.equal_range(*__i); 
-        if (_VSTD::distance(__xeq.first, __xeq.second) != 
-            _VSTD::distance(__yeq.first, __yeq.second) || 
-                  !_VSTD::is_permutation(__xeq.first, __xeq.second, __yeq.first)) 
-            return false; 
-        __i = __xeq.second; 
-    } 
-    return true; 
-} 
- 
-template <class _Value, class _Hash, class _Pred, class _Alloc> 
-inline _LIBCPP_INLINE_VISIBILITY 
-bool 
-operator!=(const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x, 
-           const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y) 
-{ 
-    return !(__x == __y); 
-} 
- 
-} // __gnu_cxx 
- 
-#endif // _LIBCPP_HASH_SET 
+{
+    for (; __first != __last; ++__first)
+        __table_.__insert_unique(*__first);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+swap(hash_set<_Value, _Hash, _Pred, _Alloc>& __x,
+     hash_set<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    __x.swap(__y);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+bool
+operator==(const hash_set<_Value, _Hash, _Pred, _Alloc>& __x,
+           const hash_set<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    if (__x.size() != __y.size())
+        return false;
+    typedef typename hash_set<_Value, _Hash, _Pred, _Alloc>::const_iterator
+                                                                 const_iterator;
+    for (const_iterator __i = __x.begin(), __ex = __x.end(), __ey = __y.end();
+            __i != __ex; ++__i)
+    {
+        const_iterator __j = __y.find(*__i);
+        if (__j == __ey || !(*__i == *__j))
+            return false;
+    }
+    return true;
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+operator!=(const hash_set<_Value, _Hash, _Pred, _Alloc>& __x,
+           const hash_set<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    return !(__x == __y);
+}
+
+template <class _Value, class _Hash = hash<_Value>, class _Pred = std::equal_to<_Value>,
+          class _Alloc = std::allocator<_Value> >
+class _LIBCPP_TEMPLATE_VIS hash_multiset
+{
+public:
+    // types
+    typedef _Value                                                     key_type;
+    typedef key_type                                                   value_type;
+    typedef _Hash                                                      hasher;
+    typedef _Pred                                                      key_equal;
+    typedef _Alloc                                                     allocator_type;
+    typedef value_type&                                                reference;
+    typedef const value_type&                                          const_reference;
+
+private:
+    typedef std::__hash_table<value_type, hasher, key_equal, allocator_type> __table;
+
+    __table __table_;
+
+public:
+    typedef typename __table::pointer         pointer;
+    typedef typename __table::const_pointer   const_pointer;
+    typedef typename __table::size_type       size_type;
+    typedef typename __table::difference_type difference_type;
+
+    typedef typename __table::const_iterator       iterator;
+    typedef typename __table::const_iterator       const_iterator;
+
+    _LIBCPP_INLINE_VISIBILITY
+    hash_multiset() { }
+    explicit hash_multiset(size_type __n, const hasher& __hf = hasher(),
+                                const key_equal& __eql = key_equal());
+    hash_multiset(size_type __n, const hasher& __hf,
+                       const key_equal& __eql, const allocator_type& __a);
+    template <class _InputIterator>
+        hash_multiset(_InputIterator __first, _InputIterator __last);
+    template <class _InputIterator>
+        hash_multiset(_InputIterator __first, _InputIterator __last,
+                      size_type __n, const hasher& __hf = hasher(),
+                      const key_equal& __eql = key_equal());
+    template <class _InputIterator>
+        hash_multiset(_InputIterator __first, _InputIterator __last,
+                      size_type __n , const hasher& __hf,
+                      const key_equal& __eql, const allocator_type& __a);
+    hash_multiset(const hash_multiset& __u);
+
+    _LIBCPP_INLINE_VISIBILITY
+    allocator_type get_allocator() const
+        {return allocator_type(__table_.__node_alloc());}
+
+    _LIBCPP_INLINE_VISIBILITY
+    bool      empty() const {return __table_.size() == 0;}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type size() const  {return __table_.size();}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type max_size() const {return __table_.max_size();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       begin()        {return __table_.begin();}
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       end()          {return __table_.end();}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator begin()  const {return __table_.begin();}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator end()    const {return __table_.end();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    iterator insert(const value_type& __x) {return __table_.__insert_multi(__x);}
+    _LIBCPP_INLINE_VISIBILITY
+    iterator insert(const_iterator, const value_type& __x) {return insert(__x);}
+    template <class _InputIterator>
+        _LIBCPP_INLINE_VISIBILITY
+        void insert(_InputIterator __first, _InputIterator __last);
+
+    _LIBCPP_INLINE_VISIBILITY
+    void erase(const_iterator __p) {__table_.erase(__p);}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type erase(const key_type& __k) {return __table_.__erase_multi(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    void erase(const_iterator __first, const_iterator __last)
+        {__table_.erase(__first, __last);}
+    _LIBCPP_INLINE_VISIBILITY
+    void clear() {__table_.clear();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    void swap(hash_multiset& __u) {__table_.swap(__u.__table_);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    hasher hash_funct() const {return __table_.hash_function();}
+    _LIBCPP_INLINE_VISIBILITY
+    key_equal key_eq() const {return __table_.key_eq();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    iterator       find(const key_type& __k)       {return __table_.find(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    const_iterator find(const key_type& __k) const {return __table_.find(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type count(const key_type& __k) const {return __table_.__count_multi(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    std::pair<iterator, iterator>             equal_range(const key_type& __k)
+        {return __table_.__equal_range_multi(__k);}
+    _LIBCPP_INLINE_VISIBILITY
+    std::pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
+        {return __table_.__equal_range_multi(__k);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    size_type bucket_count() const {return __table_.bucket_count();}
+    _LIBCPP_INLINE_VISIBILITY
+    size_type max_bucket_count() const {return __table_.max_bucket_count();}
+
+    _LIBCPP_INLINE_VISIBILITY
+    size_type elems_in_bucket(size_type __n) const {return __table_.bucket_size(__n);}
+
+    _LIBCPP_INLINE_VISIBILITY
+    void resize(size_type __n) {__table_.rehash(__n);}
+};
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        size_type __n, const hasher& __hf, const key_equal& __eql)
+    : __table_(__hf, __eql)
+{
+    __table_.rehash(__n);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        size_type __n, const hasher& __hf, const key_equal& __eql,
+        const allocator_type& __a)
+    : __table_(__hf, __eql, __a)
+{
+    __table_.rehash(__n);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        _InputIterator __first, _InputIterator __last)
+{
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        _InputIterator __first, _InputIterator __last, size_type __n,
+        const hasher& __hf, const key_equal& __eql)
+    : __table_(__hf, __eql)
+{
+    __table_.rehash(__n);
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        _InputIterator __first, _InputIterator __last, size_type __n,
+        const hasher& __hf, const key_equal& __eql, const allocator_type& __a)
+    : __table_(__hf, __eql, __a)
+{
+    __table_.rehash(__n);
+    insert(__first, __last);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::hash_multiset(
+        const hash_multiset& __u)
+    : __table_(__u.__table_)
+{
+    __table_.rehash(__u.bucket_count());
+    insert(__u.begin(), __u.end());
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+template <class _InputIterator>
+inline
+void
+hash_multiset<_Value, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
+                                                    _InputIterator __last)
+{
+    for (; __first != __last; ++__first)
+        __table_.__insert_multi(*__first);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+inline _LIBCPP_INLINE_VISIBILITY
+void
+swap(hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
+     hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    __x.swap(__y);
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+bool
+operator==(const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
+           const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    if (__x.size() != __y.size())
+        return false;
+    typedef typename hash_multiset<_Value, _Hash, _Pred, _Alloc>::const_iterator
+                                                                 const_iterator;
+    typedef std::pair<const_iterator, const_iterator> _EqRng;
+    for (const_iterator __i = __x.begin(), __ex = __x.end(); __i != __ex;)
+    {
+        _EqRng __xeq = __x.equal_range(*__i);
+        _EqRng __yeq = __y.equal_range(*__i);
+        if (_VSTD::distance(__xeq.first, __xeq.second) !=
+            _VSTD::distance(__yeq.first, __yeq.second) ||
+                  !_VSTD::is_permutation(__xeq.first, __xeq.second, __yeq.first))
+            return false;
+        __i = __xeq.second;
+    }
+    return true;
+}
+
+template <class _Value, class _Hash, class _Pred, class _Alloc>
+inline _LIBCPP_INLINE_VISIBILITY
+bool
+operator!=(const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __x,
+           const hash_multiset<_Value, _Hash, _Pred, _Alloc>& __y)
+{
+    return !(__x == __y);
+}
+
+} // __gnu_cxx
+
+#endif // _LIBCPP_HASH_SET