Public Types¶

using node_type = typename _Hashtable::node_type

typedef _Hashtable::key_type key_type
Public typedefs. typedef _Hashtable::value_type value_type
Public typedefs. typedef _Hashtable::hasher hasher
Public typedefs. typedef _Hashtable::key_equal key_equal
Public typedefs. typedef _Hashtable::allocator_type allocator_type
Public typedefs.

typedef _Hashtable::pointer pointer
Iterator-related typedefs. typedef _Hashtable::const_pointer const_pointer
Iterator-related typedefs. typedef _Hashtable::reference reference
Iterator-related typedefs. typedef _Hashtable::const_reference const_reference
Iterator-related typedefs. typedef _Hashtable::iterator iterator
Iterator-related typedefs. typedef _Hashtable::const_iterator const_iterator
Iterator-related typedefs. typedef _Hashtable::local_iterator local_iterator
Iterator-related typedefs. typedef _Hashtable::const_local_iterator const_local_iterator
Iterator-related typedefs. typedef _Hashtable::size_type size_type
Iterator-related typedefs. typedef _Hashtable::difference_type difference_type
Iterator-related typedefs.

Public Member Functions¶

unordered_multiset ()=default
Default constructor. template<typename _InputIterator > unordered_multiset (_InputIterator __first, _InputIterator __last, size_type __n, const allocator_type &__a)
template<typename _InputIterator > unordered_multiset (_InputIterator __first, _InputIterator __last, size_type __n, const hasher &__hf, const allocator_type &__a)
template<typename _InputIterator > unordered_multiset (_InputIterator __first, _InputIterator __last, size_type __n=0, const hasher &__hf=hasher(), const key_equal &__eql=key_equal(), const allocator_type &__a=allocator_type())
Builds an unordered_multiset from a range. unordered_multiset (const allocator_type &__a)
Creates an unordered_multiset with no elements. unordered_multiset (const unordered_multiset &)=default
Copy constructor. unordered_multiset (const unordered_multiset &__umset, const allocator_type &__a)
unordered_multiset (initializer_list< value_type > __l, size_type __n, const allocator_type &__a)
unordered_multiset (initializer_list< value_type > __l, size_type __n, const hasher &__hf, const allocator_type &__a)
unordered_multiset (initializer_list< value_type > __l, size_type __n=0, const hasher &__hf=hasher(), const key_equal &__eql=key_equal(), const allocator_type &__a=allocator_type())
Builds an unordered_multiset from an initializer_list. unordered_multiset (size_type __n, const allocator_type &__a)
unordered_multiset (size_type __n, const hasher &__hf, const allocator_type &__a)
unordered_multiset (size_type __n, const hasher &__hf=hasher(), const key_equal &__eql=key_equal(), const allocator_type &__a=allocator_type())
Default constructor creates no elements. unordered_multiset (unordered_multiset &&)=default
Move constructor. unordered_multiset (unordered_multiset &&__umset, const allocator_type &__a) noexcept(noexcept(_Hashtable(std::move(__umset._M_h), __a)))
size_type bucket (const key_type &__key) const
size_type bucket_count () const noexcept
Returns the number of buckets of the unordered_multiset. size_type bucket_size (size_type __n) const
const_iterator cbegin () const noexcept
const_iterator cend () const noexcept
void clear () noexcept
template<typename... _Args> iterator emplace (_Args &&... __args)
Builds and insert an element into the unordered_multiset. template<typename... _Args> iterator emplace_hint (const_iterator __pos, _Args &&... __args)
Inserts an element into the unordered_multiset. bool empty () const noexcept
Returns true if the unordered_multiset is empty. size_type erase (const key_type &__x)
Erases elements according to the provided key. iterator erase (const_iterator __first, const_iterator __last)
Erases a [__first,__last) range of elements from an unordered_multiset. node_type extract (const key_type &__key)
Extract a node. node_type extract (const_iterator __pos)
Extract a node. allocator_type get_allocator () const noexcept
Returns the allocator object used by the unordered_multiset. hasher hash_function () const
Returns the hash functor object with which the unordered_multiset was constructed. template<typename _InputIterator > void insert (_InputIterator __first, _InputIterator __last)
A template function that inserts a range of elements. iterator insert (const_iterator __hint, node_type &&__nh)
Re-insert an extracted node. void insert (initializer_list< value_type > __l)
Inserts a list of elements into the unordered_multiset. iterator insert (node_type &&__nh)
Re-insert an extracted node. key_equal key_eq () const
Returns the key comparison object with which the unordered_multiset was constructed. float load_factor () const noexcept
Returns the average number of elements per bucket. size_type max_bucket_count () const noexcept
Returns the maximum number of buckets of the unordered_multiset. float max_load_factor () const noexcept
Returns a positive number that the unordered_multiset tries to keep the load factor less than or equal to. void max_load_factor (float __z)
Change the unordered_multiset maximum load factor. size_type max_size () const noexcept
Returns the maximum size of the unordered_multiset. template<typename _H2 , typename _P2 > void merge (unordered_multiset< _Value, _H2, _P2, _Alloc > &&__source)
template<typename _H2 , typename _P2 > void merge (unordered_multiset< _Value, _H2, _P2, _Alloc > &__source)
template<typename _H2 , typename _P2 > void merge (unordered_set< _Value, _H2, _P2, _Alloc > &&__source)
template<typename _H2 , typename _P2 > void merge (unordered_set< _Value, _H2, _P2, _Alloc > &__source)
unordered_multiset & operator= (const unordered_multiset &)=default
Copy assignment operator. unordered_multiset & operator= (initializer_list< value_type > __l)
Unordered_multiset list assignment operator. unordered_multiset & operator= (unordered_multiset &&)=default
Move assignment operator. void rehash (size_type __n)
May rehash the unordered_multiset. void reserve (size_type __n)
Prepare the unordered_multiset for a specified number of elements. size_type size () const noexcept
Returns the size of the unordered_multiset. void swap (unordered_multiset &__x) noexcept(noexcept(_M_h.swap(__x._M_h)))
Swaps data with another unordered_multiset.

iterator begin () noexcept
const_iterator begin () const noexcept

iterator end () noexcept
const_iterator end () const noexcept

iterator insert (const value_type &__x)
Inserts an element into the unordered_multiset. iterator insert (value_type &&__x)
Inserts an element into the unordered_multiset.

iterator insert (const_iterator __hint, const value_type &__x)
Inserts an element into the unordered_multiset. iterator insert (const_iterator __hint, value_type &&__x)
Inserts an element into the unordered_multiset.

iterator erase (const_iterator __position)
Erases an element from an unordered_multiset. iterator erase (iterator __position)
Erases an element from an unordered_multiset.

iterator find (const key_type &__x)
Tries to locate an element in an unordered_multiset. const_iterator find (const key_type &__x) const
Tries to locate an element in an unordered_multiset.

size_type count (const key_type &__x) const
Finds the number of elements.

std::pair< iterator, iterator > equal_range (const key_type &__x)
Finds a subsequence matching given key. std::pair< const_iterator, const_iterator > equal_range (const key_type &__x) const
Finds a subsequence matching given key.

local_iterator begin (size_type __n)
Returns a read-only (constant) iterator pointing to the first bucket element. const_local_iterator begin (size_type __n) const
Returns a read-only (constant) iterator pointing to the first bucket element. const_local_iterator cbegin (size_type __n) const
Returns a read-only (constant) iterator pointing to the first bucket element.

local_iterator end (size_type __n)
Returns a read-only (constant) iterator pointing to one past the last bucket elements. const_local_iterator end (size_type __n) const
Returns a read-only (constant) iterator pointing to one past the last bucket elements. const_local_iterator cend (size_type __n) const
Returns a read-only (constant) iterator pointing to one past the last bucket elements.

Friends¶

template<typename _Value1 , typename _Hash1 , typename _Pred1 , typename _Alloc1 > bool operator== (const unordered_multiset< _Value1, _Hash1, _Pred1, _Alloc1 > &, const unordered_multiset< _Value1, _Hash1, _Pred1, _Alloc1 > &)
template<typename , typename , typename > class std::_Hash_merge_helper

template<typename _Value, typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>>¶

class std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >" A standard container composed of equivalent keys (possibly containing multiple of each key value) in which the elements' keys are the elements themselves.

Template Parameters

Meets the requirements of a container, and unordered associative container

Base is _Hashtable, dispatched at compile time via template alias __umset_hashtable.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::allocator_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::allocator_type¶

Public typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::const_iterator¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::const_local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::const_local_iterator¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::const_pointer std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::const_pointer¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::const_reference std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::const_reference¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::difference_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::difference_type¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::hasher std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::hasher¶

Public typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::iterator¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::key_equal std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::key_equal¶

Public typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::key_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::key_type¶

Public typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::local_iterator¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::pointer std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::pointer¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::reference std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::reference¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::size_type¶

Iterator-related typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> typedef _Hashtable::value_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::value_type¶

Public typedefs.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset () [default]¶

Default constructor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (size_type __n, const hasher & __hf = hasher(), const key_equal & __eql = key_equal(), const allocator_type & __a = allocator_type()) [inline], [explicit]¶

Default constructor creates no elements.

Parameters

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> template<typename _InputIterator > std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (_InputIterator __first, _InputIterator __last, size_type __n = 0, const hasher & __hf = hasher(), const key_equal & __eql = key_equal(), const allocator_type & __a = allocator_type()) [inline]¶

Builds an unordered_multiset from a range.

Parameters

Create an unordered_multiset consisting of copies of the elements from [__first,__last). This is linear in N (where N is distance(__first,__last)).

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (const unordered_multiset< _Value, _Hash, _Pred, _Alloc > &) [default]¶

Copy constructor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (unordered_multiset< _Value, _Hash, _Pred, _Alloc > &&) [default]¶

Move constructor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (initializer_list< value_type > __l, size_type __n = 0, const hasher & __hf = hasher(), const key_equal & __eql = key_equal(), const allocator_type & __a = allocator_type()) [inline]¶

Builds an unordered_multiset from an initializer_list.

Parameters

Create an unordered_multiset consisting of copies of the elements in the list. This is linear in N (where N is __l.size()).

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::unordered_multiset (const allocator_type & __a) [inline], [explicit]¶

Creates an unordered_multiset with no elements.

Parameters

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::begin () const [inline], [noexcept]¶

Returns a read-only (constant) iterator that points to the first element in the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::begin () [inline], [noexcept]¶

Returns a read-only (constant) iterator that points to the first element in the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::begin (size_type __n) [inline]¶

Returns a read-only (constant) iterator pointing to the first bucket element.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::begin (size_type __n) const [inline]¶

Returns a read-only (constant) iterator pointing to the first bucket element.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::bucket_count () const [inline], [noexcept]¶

Returns the number of buckets of the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::cbegin () const [inline], [noexcept]¶

Returns a read-only (constant) iterator that points to the first element in the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::cbegin (size_type __n) const [inline]¶

Returns a read-only (constant) iterator pointing to the first bucket element.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::cend () const [inline], [noexcept]¶

Returns a read-only (constant) iterator that points one past the last element in the unordered_multiset.

Referenced by std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert().

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::cend (size_type __n) const [inline]¶

Returns a read-only (constant) iterator pointing to one past the last bucket elements.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::clear () [inline], [noexcept]¶

Erases all elements in an unordered_multiset.

Note that this function only erases the elements, and that if the elements themselves are pointers, the pointed-to memory is not touched in any way. Managing the pointer is the user's responsibility.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::count (const key_type & __x) const [inline]¶

Finds the number of elements.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> template<typename... _Args> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::emplace (_Args &&... __args) [inline]¶

Builds and insert an element into the unordered_multiset.

Parameters

Returns

Insertion requires amortized constant time.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> template<typename... _Args> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::emplace_hint (const_iterator __pos, _Args &&... __args) [inline]¶

Inserts an element into the unordered_multiset.

Parameters

Returns

Note that the first parameter is only a hint and can potentially improve the performance of the insertion process. A bad hint would cause no gains in efficiency.

For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints

Insertion requires amortized constant time.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> bool std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::empty () const [inline], [noexcept]¶

Returns true if the unordered_multiset is empty.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::end () const [inline], [noexcept]¶

Returns a read-only (constant) iterator that points one past the last element in the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::end () [inline], [noexcept]¶

Returns a read-only (constant) iterator that points one past the last element in the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::end (size_type __n) [inline]¶

Returns a read-only (constant) iterator pointing to one past the last bucket elements.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_local_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::end (size_type __n) const [inline]¶

Returns a read-only (constant) iterator pointing to one past the last bucket elements.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::pair<iterator, iterator> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::equal_range (const key_type & __x) [inline]¶

Finds a subsequence matching given key.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> std::pair<const_iterator, const_iterator> std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::equal_range (const key_type & __x) const [inline]¶

Finds a subsequence matching given key.

Parameters

Returns

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::erase (const key_type & __x) [inline]¶

Erases elements according to the provided key.

Parameters

Returns

This function erases all the elements located by the given key from an unordered_multiset.

Note that this function only erases the element, and that if the element is itself a pointer, the pointed-to memory is not touched in any way. Managing the pointer is the user's responsibility.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::erase (const_iterator __first, const_iterator __last) [inline]¶

Erases a [__first,__last) range of elements from an unordered_multiset.

Parameters

Returns

This function erases a sequence of elements from an unordered_multiset.

Note that this function only erases the element, and that if the element is itself a pointer, the pointed-to memory is not touched in any way. Managing the pointer is the user's responsibility.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::erase (const_iterator __position) [inline]¶

Erases an element from an unordered_multiset.

Parameters

Returns

This function erases an element, pointed to by the given iterator, from an unordered_multiset.

Note that this function only erases the element, and that if the element is itself a pointer, the pointed-to memory is not touched in any way. Managing the pointer is the user's responsibility.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::erase (iterator __position) [inline]¶

Erases an element from an unordered_multiset.

Parameters

Returns

This function erases an element, pointed to by the given iterator, from an unordered_multiset.

Note that this function only erases the element, and that if the element is itself a pointer, the pointed-to memory is not touched in any way. Managing the pointer is the user's responsibility.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> node_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::extract (const key_type & __key) [inline]¶

Extract a node.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> node_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::extract (const_iterator __pos) [inline]¶

Extract a node.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::find (const key_type & __x) [inline]¶

Tries to locate an element in an unordered_multiset.

Parameters

Returns

This function takes a key and tries to locate the element with which the key matches. If successful the function returns an iterator pointing to the sought after element. If unsuccessful it returns the past-the-end ( end() ) iterator.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> const_iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::find (const key_type & __x) const [inline]¶

Tries to locate an element in an unordered_multiset.

Parameters

Returns

This function takes a key and tries to locate the element with which the key matches. If successful the function returns an iterator pointing to the sought after element. If unsuccessful it returns the past-the-end ( end() ) iterator.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> allocator_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::get_allocator () const [inline], [noexcept]¶

Returns the allocator object used by the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> hasher std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::hash_function () const [inline]¶

Returns the hash functor object with which the unordered_multiset was constructed.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> template<typename _InputIterator > void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (_InputIterator __first, _InputIterator __last) [inline]¶

A template function that inserts a range of elements.

Parameters

Complexity similar to that of the range constructor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (const value_type & __x) [inline]¶

Inserts an element into the unordered_multiset.

Parameters

Returns

Insertion requires amortized constant time.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (const_iterator __hint, const value_type & __x) [inline]¶

Inserts an element into the unordered_multiset.

Parameters

Returns

Note that the first parameter is only a hint and can potentially improve the performance of the insertion process. A bad hint would cause no gains in efficiency.

For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints

Insertion requires amortized constant.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (const_iterator __hint, node_type && __nh) [inline]¶

Re-insert an extracted node.

References std::move().

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (const_iterator __hint, value_type && __x) [inline]¶

Inserts an element into the unordered_multiset.

Parameters

Returns

Note that the first parameter is only a hint and can potentially improve the performance of the insertion process. A bad hint would cause no gains in efficiency.

For more on hinting, see: https://gcc.gnu.org/onlinedocs/libstdc++/manual/associative.html#containers.associative.insert_hints

Insertion requires amortized constant.

References std::move().

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (initializer_list< value_type > __l) [inline]¶

Inserts a list of elements into the unordered_multiset.

Parameters

Complexity similar to that of the range constructor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (node_type && __nh) [inline]¶

Re-insert an extracted node.

References std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::cend(), and std::move().

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> iterator std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::insert (value_type && __x) [inline]¶

Inserts an element into the unordered_multiset.

Parameters

Returns

Insertion requires amortized constant time.

References std::move().

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> key_equal std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::key_eq () const [inline]¶

Returns the key comparison object with which the unordered_multiset was constructed.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> float std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::load_factor () const [inline], [noexcept]¶

Returns the average number of elements per bucket.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::max_bucket_count () const [inline], [noexcept]¶

Returns the maximum number of buckets of the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> float std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::max_load_factor () const [inline], [noexcept]¶

Returns a positive number that the unordered_multiset tries to keep the load factor less than or equal to.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::max_load_factor (float __z) [inline]¶

Change the unordered_multiset maximum load factor.

Parameters

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::max_size () const [inline], [noexcept]¶

Returns the maximum size of the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> unordered_multiset& std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::operator= (const unordered_multiset< _Value, _Hash, _Pred, _Alloc > &) [default]¶

Copy assignment operator.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> unordered_multiset& std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::operator= (initializer_list< value_type > __l) [inline]¶

Unordered_multiset list assignment operator.

Parameters

This function fills an unordered_multiset with copies of the elements in the initializer list __l.

Note that the assignment completely changes the unordered_multiset and that the resulting unordered_multiset's size is the same as the number of elements assigned.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> unordered_multiset& std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::operator= (unordered_multiset< _Value, _Hash, _Pred, _Alloc > &&) [default]¶

Move assignment operator.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::rehash (size_type __n) [inline]¶

May rehash the unordered_multiset.

Parameters

Rehash will occur only if the new number of buckets respect the unordered_multiset maximum load factor.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::reserve (size_type __n) [inline]¶

Prepare the unordered_multiset for a specified number of elements.

Parameters

Same as rehash(ceil(n / max_load_factor())).

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> size_type std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::size () const [inline], [noexcept]¶

Returns the size of the unordered_multiset.

template<typename _Value , typename _Hash = hash<_Value>, typename _Pred = equal_to<_Value>, typename _Alloc = allocator<_Value>> void std::unordered_multiset< _Value, _Hash, _Pred, _Alloc >::swap (unordered_multiset< _Value, _Hash, _Pred, _Alloc > & __x) [inline], [noexcept]¶

Swaps data with another unordered_multiset.

Parameters

This exchanges the elements between two sets in constant time. Note that the global std::swap() function is specialized such that std::swap(s1,s2) will feed to this function.