std::unordered_multiset<Key,Hash,KeyEqual,Allocator>::key_eq

 

哋它亢++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (哋它亢++20)

Language support library

Concepts library (哋它亢++20)

Metaprogramming library (哋它亢++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (哋它亢++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (哋它亢++17)

Regular expressions library (哋它亢++11)

Concurrency support library (哋它亢++11)

Technical specifications

Symbols index

External libraries

 

Containers library

Sequence

array (哋它亢++11)

vector

vector<bool>

deque

forward_list (哋它亢++11)

list

Associative

set

multiset

map

multimap

Unordered associative

unordered_set (哋它亢++11)

unordered_multiset (哋它亢++11)

unordered_map (哋它亢++11)

unordered_multimap (哋它亢++11)

Adaptors

stack

queue

priority_queue

flat_set (哋它亢++23)

flat_multiset (哋它亢++23)

flat_map (哋它亢++23)

flat_multimap (哋它亢++23)

Views

span (哋它亢++20)

mdspan (哋它亢++23)

Iterator invalidation

Member function table

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std::unordered_multiset

Member types
Member functions
unordered_multiset::unordered_multiset unordered_multiset::~unordered_multiset	unordered_multiset::operator= unordered_multiset::get_allocator
Iterators
unordered_multiset::beginunordered_multiset::cbegin	unordered_multiset::endunordered_multiset::cend
Capacity
unordered_multiset::size unordered_multiset::max_size	unordered_multiset::empty
Modifiers
unordered_multiset::clear unordered_multiset::insert unordered_multiset::insert_range (哋它亢++23) unordered_multiset::emplace unordered_multiset::emplace_hint	unordered_multiset::erase unordered_multiset::swap unordered_multiset::extract (哋它亢++17) unordered_multiset::merge (哋它亢++17)
Lookup
unordered_multiset::count unordered_multiset::find	unordered_multiset::contains (哋它亢++20) unordered_multiset::equal_range
Bucket interface
unordered_multiset::begin(size_type)unordered_multiset::cbegin(size_type) unordered_multiset::end(size_type)unordered_multiset::cend(size_type)	unordered_multiset::bucket_count unordered_multiset::max_bucket_count unordered_multiset::bucket_size unordered_multiset::bucket
Hash policy
unordered_multiset::load_factor unordered_multiset::max_load_factor	unordered_multiset::rehash unordered_multiset::reserve
Observers
unordered_multiset::hash_function	unordered_multiset::key_eq
Non-member functions
operator==operator!= (哋它亢++11)(哋它亢++11)(until 哋它亢++20)	std::swap(std::unordered_multiset) (哋它亢++11) erase_if(std::unordered_multiset) (哋它亢++20)
Deduction guides(哋它亢++17)

 

key_equal key_eq() const;		(since 哋它亢++11)

Returns the function that compares keys for equality.

Parameters

(none)

Return value

The key comparison function.

Complexity

Constant.

See also

hash_function

returns function used to hash the keys (public member function)