include/ext/hash_map

// -*- C++ -*-
//===-------------------------- hash_map ----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP_HASH_MAP
#define _LIBCPP_HASH_MAP

/*

 hash_map synopsis

namespace __gnu_cxx
{

template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
 class Alloc = allocator<pair<const Key, T>>>
class hash_map
{
public:
 // types
 typedef Key key_type;
 typedef T mapped_type;
 typedef Hash hasher;
 typedef Pred key_equal;
 typedef Alloc allocator_type;
 typedef pair<const key_type, mapped_type> value_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_map(size_type n = 193, const hasher& hf = hasher(),
 const key_equal& eql = key_equal(),
 const allocator_type& a = allocator_type());
 template <class InputIterator>
 hash_map(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_map(const hash_map&);
 ~hash_map();
 hash_map& operator=(const hash_map&);

 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_map&);

 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;

 mapped_type& operator[](const key_type& k);

 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 Key, class T, class Hash, class Pred, class Alloc>
 void swap(hash_map<Key, T, Hash, Pred, Alloc>& x,
 hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
 bool
 operator==(const hash_map<Key, T, Hash, Pred, Alloc>& x,
 const hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
 bool
 operator!=(const hash_map<Key, T, Hash, Pred, Alloc>& x,
 const hash_map<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
 class Alloc = allocator<pair<const Key, T>>>
class hash_multimap
{
public:
 // types
 typedef Key key_type;
 typedef T mapped_type;
 typedef Hash hasher;
 typedef Pred key_equal;
 typedef Alloc allocator_type;
 typedef pair<const key_type, mapped_type> value_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_multimap(size_type n = 193, const hasher& hf = hasher(),
 const key_equal& eql = key_equal(),
 const allocator_type& a = allocator_type());
 template <class InputIterator>
 hash_multimap(InputIterator f, InputIterator l,
 size_type n = 193, const hasher& hf = hasher(),
 const key_equal& eql = key_equal(),
 const allocator_type& a = allocator_type());
 explicit hash_multimap(const allocator_type&);
 hash_multimap(const hash_multimap&);
 ~hash_multimap();
 hash_multimap& operator=(const hash_multimap&);

 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_multimap&);

 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 Key, class T, class Hash, class Pred, class Alloc>
 void swap(hash_multimap<Key, T, Hash, Pred, Alloc>& x,
 hash_multimap<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
 bool
 operator==(const hash_multimap<Key, T, Hash, Pred, Alloc>& x,
 const hash_multimap<Key, T, Hash, Pred, Alloc>& y);

template <class Key, class T, class Hash, class Pred, class Alloc>
 bool
 operator!=(const hash_multimap<Key, T, Hash, Pred, Alloc>& x,
 const hash_multimap<Key, T, Hash, Pred, Alloc>& y);

} // __gnu_cxx

*/

#include <__config>
#include <__hash_table>
#include <functional>
#include <stdexcept>
#include <type_traits>
#include <ext/__hash>

#if __DEPRECATED
#if defined(_LIBCPP_MSVC)
 _LIBCPP_WARNING("Use of the header <ext/hash_map> is deprecated. Migrate to <unordered_map>")
#else
# warning Use of the header <ext/hash_map> is deprecated. Migrate to <unordered_map>
#endif
#endif

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif

namespace __gnu_cxx {

using namespace std;

template <class _Tp, class _Hash,
 bool = is_empty<_Hash>::value && !__libcpp_is_final<_Hash>::value
 >
class __hash_map_hasher
 : private _Hash
{
public:
 _LIBCPP_INLINE_VISIBILITY __hash_map_hasher() : _Hash() {}
 _LIBCPP_INLINE_VISIBILITY __hash_map_hasher(const _Hash& __h) : _Hash(__h) {}
 _LIBCPP_INLINE_VISIBILITY const _Hash& hash_function() const {return *this;}
 _LIBCPP_INLINE_VISIBILITY
 size_t operator()(const _Tp& __x) const
 {return static_cast<const _Hash&>(*this)(__x.first);}
 _LIBCPP_INLINE_VISIBILITY
 size_t operator()(const typename _Tp::first_type& __x) const
 {return static_cast<const _Hash&>(*this)(__x);}
};

template <class _Tp, class _Hash>
class __hash_map_hasher<_Tp, _Hash, false>
{
 _Hash __hash_;
public:
 _LIBCPP_INLINE_VISIBILITY __hash_map_hasher() : __hash_() {}
 _LIBCPP_INLINE_VISIBILITY __hash_map_hasher(const _Hash& __h) : __hash_(__h) {}
 _LIBCPP_INLINE_VISIBILITY const _Hash& hash_function() const {return __hash_;}
 _LIBCPP_INLINE_VISIBILITY
 size_t operator()(const _Tp& __x) const
 {return __hash_(__x.first);}
 _LIBCPP_INLINE_VISIBILITY
 size_t operator()(const typename _Tp::first_type& __x) const
 {return __hash_(__x);}
};

template <class _Tp, class _Pred,
 bool = is_empty<_Pred>::value && !__libcpp_is_final<_Pred>::value
 >
class __hash_map_equal
 : private _Pred
{
public:
 _LIBCPP_INLINE_VISIBILITY __hash_map_equal() : _Pred() {}
 _LIBCPP_INLINE_VISIBILITY __hash_map_equal(const _Pred& __p) : _Pred(__p) {}
 _LIBCPP_INLINE_VISIBILITY const _Pred& key_eq() const {return *this;}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const _Tp& __x, const _Tp& __y) const
 {return static_cast<const _Pred&>(*this)(__x.first, __y.first);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const typename _Tp::first_type& __x, const _Tp& __y) const
 {return static_cast<const _Pred&>(*this)(__x, __y.first);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const _Tp& __x, const typename _Tp::first_type& __y) const
 {return static_cast<const _Pred&>(*this)(__x.first, __y);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const typename _Tp::first_type& __x,
 const typename _Tp::first_type& __y) const
 {return static_cast<const _Pred&>(*this)(__x, __y);}
};

template <class _Tp, class _Pred>
class __hash_map_equal<_Tp, _Pred, false>
{
 _Pred __pred_;
public:
 _LIBCPP_INLINE_VISIBILITY __hash_map_equal() : __pred_() {}
 _LIBCPP_INLINE_VISIBILITY __hash_map_equal(const _Pred& __p) : __pred_(__p) {}
 _LIBCPP_INLINE_VISIBILITY const _Pred& key_eq() const {return __pred_;}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const _Tp& __x, const _Tp& __y) const
 {return __pred_(__x.first, __y.first);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const typename _Tp::first_type& __x, const _Tp& __y) const
 {return __pred_(__x, __y.first);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const _Tp& __x, const typename _Tp::first_type& __y) const
 {return __pred_(__x.first, __y);}
 _LIBCPP_INLINE_VISIBILITY
 bool operator()(const typename _Tp::first_type& __x,
 const typename _Tp::first_type& __y) const
 {return __pred_(__x, __y);}
};

template <class _Alloc>
class __hash_map_node_destructor
{
 typedef _Alloc allocator_type;
 typedef allocator_traits<allocator_type> __alloc_traits;
 typedef typename __alloc_traits::value_type::__node_value_type value_type;
public:
 typedef typename __alloc_traits::pointer pointer;
private:
 typedef typename value_type::first_type first_type;
 typedef typename value_type::second_type second_type;

 allocator_type& __na_;

 __hash_map_node_destructor& operator=(const __hash_map_node_destructor&);

public:
 bool __first_constructed;
 bool __second_constructed;

 _LIBCPP_INLINE_VISIBILITY
 explicit __hash_map_node_destructor(allocator_type& __na)
 : __na_(__na),
 __first_constructed(false),
 __second_constructed(false)
 {}

#ifndef _LIBCPP_CXX03_LANG
 _LIBCPP_INLINE_VISIBILITY
 __hash_map_node_destructor(__hash_node_destructor<allocator_type>&& __x)
 : __na_(__x.__na_),
 __first_constructed(__x.__value_constructed),
 __second_constructed(__x.__value_constructed)
 {
 __x.__value_constructed = false;
 }
#else // _LIBCPP_CXX03_LANG
 _LIBCPP_INLINE_VISIBILITY
 __hash_map_node_destructor(const __hash_node_destructor<allocator_type>& __x)
 : __na_(__x.__na_),
 __first_constructed(__x.__value_constructed),
 __second_constructed(__x.__value_constructed)
 {
 const_cast<bool&>(__x.__value_constructed) = false;
 }
#endif // _LIBCPP_CXX03_LANG

 _LIBCPP_INLINE_VISIBILITY
 void operator()(pointer __p)
 {
 if (__second_constructed)
 __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.second));
 if (__first_constructed)
 __alloc_traits::destroy(__na_, _VSTD::addressof(__p->__value_.first));
 if (__p)
 __alloc_traits::deallocate(__na_, __p, 1);
 }
};

template <class _HashIterator>
class _LIBCPP_TEMPLATE_VIS __hash_map_iterator
{
 _HashIterator __i_;

 typedef const typename _HashIterator::value_type::first_type key_type;
 typedef typename _HashIterator::value_type::second_type mapped_type;
public:
 typedef forward_iterator_tag iterator_category;
 typedef pair<key_type, mapped_type> value_type;
 typedef typename _HashIterator::difference_type difference_type;
 typedef value_type& reference;
 typedef typename __rebind_pointer<typename _HashIterator::pointer, value_type>::type
 pointer;

 _LIBCPP_INLINE_VISIBILITY __hash_map_iterator() {}

 _LIBCPP_INLINE_VISIBILITY __hash_map_iterator(_HashIterator __i) : __i_(__i) {}

 _LIBCPP_INLINE_VISIBILITY reference operator*() const {return *operator->();}
 _LIBCPP_INLINE_VISIBILITY pointer operator->() const {return (pointer)__i_.operator->();}

 _LIBCPP_INLINE_VISIBILITY __hash_map_iterator& operator++() {++__i_; return *this;}
 _LIBCPP_INLINE_VISIBILITY
 __hash_map_iterator operator++(int)
 {
 __hash_map_iterator __t(*this);
 ++(*this);
 return __t;
 }

 friend _LIBCPP_INLINE_VISIBILITY 
 bool operator==(const __hash_map_iterator& __x, const __hash_map_iterator& __y)
 {return __x.__i_ == __y.__i_;}
 friend _LIBCPP_INLINE_VISIBILITY 
 bool operator!=(const __hash_map_iterator& __x, const __hash_map_iterator& __y)
 {return __x.__i_ != __y.__i_;}

 template <class, class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS hash_map;
 template <class, class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS hash_multimap;
 template <class> friend class _LIBCPP_TEMPLATE_VIS __hash_const_iterator;
 template <class> friend class _LIBCPP_TEMPLATE_VIS __hash_const_local_iterator;
 template <class> friend class _LIBCPP_TEMPLATE_VIS __hash_map_const_iterator;
};

template <class _HashIterator>
class _LIBCPP_TEMPLATE_VIS __hash_map_const_iterator
{
 _HashIterator __i_;

 typedef const typename _HashIterator::value_type::first_type key_type;
 typedef typename _HashIterator::value_type::second_type mapped_type;
public:
 typedef forward_iterator_tag iterator_category;
 typedef pair<key_type, mapped_type> value_type;
 typedef typename _HashIterator::difference_type difference_type;
 typedef const value_type& reference;
 typedef typename __rebind_pointer<typename _HashIterator::pointer, const value_type>::type
 pointer;

 _LIBCPP_INLINE_VISIBILITY __hash_map_const_iterator() {}

 _LIBCPP_INLINE_VISIBILITY
 __hash_map_const_iterator(_HashIterator __i) : __i_(__i) {}
 _LIBCPP_INLINE_VISIBILITY
 __hash_map_const_iterator(
 __hash_map_iterator<typename _HashIterator::__non_const_iterator> __i)
 : __i_(__i.__i_) {}

 _LIBCPP_INLINE_VISIBILITY
 reference operator*() const {return *operator->();}
 _LIBCPP_INLINE_VISIBILITY
 pointer operator->() const {return (pointer)__i_.operator->();}

 _LIBCPP_INLINE_VISIBILITY
 __hash_map_const_iterator& operator++() {++__i_; return *this;}
 _LIBCPP_INLINE_VISIBILITY
 __hash_map_const_iterator operator++(int)
 {
 __hash_map_const_iterator __t(*this);
 ++(*this);
 return __t;
 }

 friend _LIBCPP_INLINE_VISIBILITY
 bool operator==(const __hash_map_const_iterator& __x, const __hash_map_const_iterator& __y)
 {return __x.__i_ == __y.__i_;}
 friend _LIBCPP_INLINE_VISIBILITY
 bool operator!=(const __hash_map_const_iterator& __x, const __hash_map_const_iterator& __y)
 {return __x.__i_ != __y.__i_;}

 template <class, class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS hash_map;
 template <class, class, class, class, class> friend class _LIBCPP_TEMPLATE_VIS hash_multimap;
 template <class> friend class _LIBCPP_TEMPLATE_VIS __hash_const_iterator;
 template <class> friend class _LIBCPP_TEMPLATE_VIS __hash_const_local_iterator;
};

template <class _Key, class _Tp, class _Hash = hash<_Key>, class _Pred = equal_to<_Key>,
 class _Alloc = allocator<pair<const _Key, _Tp> > >
class _LIBCPP_TEMPLATE_VIS hash_map
{
public:
 // types
 typedef _Key key_type;
 typedef _Tp mapped_type;
 typedef _Tp data_type;
 typedef _Hash hasher;
 typedef _Pred key_equal;
 typedef _Alloc allocator_type;
 typedef pair<const key_type, mapped_type> value_type;
 typedef value_type& reference;
 typedef const value_type& const_reference;

private:
 typedef pair<key_type, mapped_type> __value_type;
 typedef __hash_map_hasher<__value_type, hasher> __hasher;
 typedef __hash_map_equal<__value_type, key_equal> __key_equal;
 typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>, __value_type>::type __allocator_type;

 typedef __hash_table<__value_type, __hasher,
 __key_equal, __allocator_type> __table;

 __table __table_;

 typedef typename __table::__node_pointer __node_pointer;
 typedef typename __table::__node_const_pointer __node_const_pointer;
 typedef typename __table::__node_traits __node_traits;
 typedef typename __table::__node_allocator __node_allocator;
 typedef typename __table::__node __node;
 typedef __hash_map_node_destructor<__node_allocator> _Dp;
 typedef unique_ptr<__node, _Dp> __node_holder;
 typedef allocator_traits<allocator_type> __alloc_traits;
public:
 typedef typename __alloc_traits::pointer pointer;
 typedef typename __alloc_traits::const_pointer const_pointer;
 typedef typename __alloc_traits::size_type size_type;
 typedef typename __alloc_traits::difference_type difference_type;

 typedef __hash_map_iterator<typename __table::iterator> iterator;
 typedef __hash_map_const_iterator<typename __table::const_iterator> const_iterator;

 _LIBCPP_INLINE_VISIBILITY hash_map() {__table_.rehash(193);}
 explicit hash_map(size_type __n, const hasher& __hf = hasher(),
 const key_equal& __eql = key_equal());
 hash_map(size_type __n, const hasher& __hf,
 const key_equal& __eql,
 const allocator_type& __a);
 template <class _InputIterator>
 hash_map(_InputIterator __first, _InputIterator __last);
 template <class _InputIterator>
 hash_map(_InputIterator __first, _InputIterator __last,
 size_type __n, const hasher& __hf = hasher(),
 const key_equal& __eql = key_equal());
 template <class _InputIterator>
 hash_map(_InputIterator __first, _InputIterator __last,
 size_type __n, const hasher& __hf,
 const key_equal& __eql,
 const allocator_type& __a);
 hash_map(const hash_map& __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
 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.__i_);}
 _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.__i_, __last.__i_);}
 _LIBCPP_INLINE_VISIBILITY
 void clear() {__table_.clear();}

 _LIBCPP_INLINE_VISIBILITY
 void swap(hash_map& __u) {__table_.swap(__u.__table_);}

 _LIBCPP_INLINE_VISIBILITY
 hasher hash_funct() const
 {return __table_.hash_function().hash_function();}
 _LIBCPP_INLINE_VISIBILITY
 key_equal key_eq() const
 {return __table_.key_eq().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
 pair<iterator, iterator> equal_range(const key_type& __k)
 {return __table_.__equal_range_unique(__k);}
 _LIBCPP_INLINE_VISIBILITY
 pair<const_iterator, const_iterator> equal_range(const key_type& __k) const
 {return __table_.__equal_range_unique(__k);}

 mapped_type& operator[](const key_type& __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);}

private:
 __node_holder __construct_node(const key_type& __k);
};

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 size_type __n, const hasher& __hf, const key_equal& __eql)
 : __table_(__hf, __eql)
{
 __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 size_type __n, const hasher& __hf, const key_equal& __eql,
 const allocator_type& __a)
 : __table_(__hf, __eql, __a)
{
 __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 _InputIterator __first, _InputIterator __last)
{
 __table_.rehash(193);
 insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 _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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 _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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_map(
 const hash_map& __u)
 : __table_(__u.__table_)
{
 __table_.rehash(__u.bucket_count());
 insert(__u.begin(), __u.end());
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
typename hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::__node_holder
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::__construct_node(const key_type& __k)
{
 __node_allocator& __na = __table_.__node_alloc();
 __node_holder __h(__node_traits::allocate(__na, 1), _Dp(__na));
 __node_traits::construct(__na, _VSTD::addressof(__h->__value_.first), __k);
 __h.get_deleter().__first_constructed = true;
 __node_traits::construct(__na, _VSTD::addressof(__h->__value_.second));
 __h.get_deleter().__second_constructed = true;
 return _LIBCPP_EXPLICIT_MOVE(__h); // explicitly moved for C++03
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
inline
void
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
 _InputIterator __last)
{
 for (; __first != __last; ++__first)
 __table_.__insert_unique(*__first);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
_Tp&
hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>::operator[](const key_type& __k)
{
 iterator __i = find(__k);
 if (__i != end())
 return __i->second;
 __node_holder __h = __construct_node(__k);
 pair<iterator, bool> __r = __table_.__node_insert_unique(__h.get());
 __h.release();
 return __r.first->second;
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
 hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
 __x.swap(__y);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
bool
operator==(const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
 const hash_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
 if (__x.size() != __y.size())
 return false;
 typedef typename hash_map<_Key, _Tp, _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->first);
 if (__j == __ey || !(*__i == *__j))
 return false;
 }
 return true;
}

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

template <class _Key, class _Tp, class _Hash = hash<_Key>, class _Pred = equal_to<_Key>,
 class _Alloc = allocator<pair<const _Key, _Tp> > >
class _LIBCPP_TEMPLATE_VIS hash_multimap
{
public:
 // types
 typedef _Key key_type;
 typedef _Tp mapped_type;
 typedef _Tp data_type;
 typedef _Hash hasher;
 typedef _Pred key_equal;
 typedef _Alloc allocator_type;
 typedef pair<const key_type, mapped_type> value_type;
 typedef value_type& reference;
 typedef const value_type& const_reference;

private:
 typedef pair<key_type, mapped_type> __value_type;
 typedef __hash_map_hasher<__value_type, hasher> __hasher;
 typedef __hash_map_equal<__value_type, key_equal> __key_equal;
 typedef typename __rebind_alloc_helper<allocator_traits<allocator_type>, __value_type>::type __allocator_type;

 typedef __hash_table<__value_type, __hasher,
 __key_equal, __allocator_type> __table;

 __table __table_;

 typedef typename __table::__node_traits __node_traits;
 typedef typename __table::__node_allocator __node_allocator;
 typedef typename __table::__node __node;
 typedef __hash_map_node_destructor<__node_allocator> _Dp;
 typedef unique_ptr<__node, _Dp> __node_holder;
 typedef allocator_traits<allocator_type> __alloc_traits;
public:
 typedef typename __alloc_traits::pointer pointer;
 typedef typename __alloc_traits::const_pointer const_pointer;
 typedef typename __alloc_traits::size_type size_type;
 typedef typename __alloc_traits::difference_type difference_type;

 typedef __hash_map_iterator<typename __table::iterator> iterator;
 typedef __hash_map_const_iterator<typename __table::const_iterator> const_iterator;

 _LIBCPP_INLINE_VISIBILITY
 hash_multimap() {__table_.rehash(193);}
 explicit hash_multimap(size_type __n, const hasher& __hf = hasher(),
 const key_equal& __eql = key_equal());
 hash_multimap(size_type __n, const hasher& __hf,
 const key_equal& __eql,
 const allocator_type& __a);
 template <class _InputIterator>
 hash_multimap(_InputIterator __first, _InputIterator __last);
 template <class _InputIterator>
 hash_multimap(_InputIterator __first, _InputIterator __last,
 size_type __n, const hasher& __hf = hasher(),
 const key_equal& __eql = key_equal());
 template <class _InputIterator>
 hash_multimap(_InputIterator __first, _InputIterator __last,
 size_type __n, const hasher& __hf,
 const key_equal& __eql,
 const allocator_type& __a);
 hash_multimap(const hash_multimap& __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.__i_);}
 _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.__i_, __last.__i_);}
 _LIBCPP_INLINE_VISIBILITY
 void clear() {__table_.clear();}

 _LIBCPP_INLINE_VISIBILITY
 void swap(hash_multimap& __u) {__table_.swap(__u.__table_);}

 _LIBCPP_INLINE_VISIBILITY
 hasher hash_funct() const
 {return __table_.hash_function().hash_function();}
 _LIBCPP_INLINE_VISIBILITY
 key_equal key_eq() const
 {return __table_.key_eq().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
 pair<iterator, iterator> equal_range(const key_type& __k)
 {return __table_.__equal_range_multi(__k);}
 _LIBCPP_INLINE_VISIBILITY
 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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 size_type __n, const hasher& __hf, const key_equal& __eql)
 : __table_(__hf, __eql)
{
 __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 size_type __n, const hasher& __hf, const key_equal& __eql,
 const allocator_type& __a)
 : __table_(__hf, __eql, __a)
{
 __table_.rehash(__n);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 _InputIterator __first, _InputIterator __last)
{
 __table_.rehash(193);
 insert(__first, __last);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 _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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 _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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::hash_multimap(
 const hash_multimap& __u)
 : __table_(__u.__table_)
{
 __table_.rehash(__u.bucket_count());
 insert(__u.begin(), __u.end());
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
template <class _InputIterator>
inline
void
hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::insert(_InputIterator __first,
 _InputIterator __last)
{
 for (; __first != __last; ++__first)
 __table_.__insert_multi(*__first);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
void
swap(hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
 hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
 __x.swap(__y);
}

template <class _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
bool
operator==(const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
 const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
 if (__x.size() != __y.size())
 return false;
 typedef typename hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>::const_iterator
 const_iterator;
 typedef pair<const_iterator, const_iterator> _EqRng;
 for (const_iterator __i = __x.begin(), __ex = __x.end(); __i != __ex;)
 {
 _EqRng __xeq = __x.equal_range(__i->first);
 _EqRng __yeq = __y.equal_range(__i->first);
 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 _Key, class _Tp, class _Hash, class _Pred, class _Alloc>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
 const hash_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
{
 return !(__x == __y);
}

} // __gnu_cxx

#endif // _LIBCPP_HASH_MAP