std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>:: emplace_hint

template < class ... Args > iterator emplace_hint ( const_iterator hint, Args && ... args ) ;		(since C++11) (constexpr since C++26)

Inserts a new element into the container, using hint as a suggestion where the element should go.

The constructor of value_type (i.e., std:: pair < const Key, T > ) is called with exactly the same arguments as supplied to the function, forwarded with std:: forward < Args > ( args ) ... .

If after the operation the new number of elements is greater than old max_load_factor() * bucket_count() a rehashing takes place.
If rehashing occurs (due to the insertion), all iterators are invalidated. Otherwise (no rehashing), iterators are not invalidated.

Contents 1 Parameters 2 Return value 3 Exceptions 4 Complexity 5 Example 6 See also

Parameters

hint	-	iterator, used as a suggestion as to where to insert the new element
args	-	arguments to forward to the constructor of the element

Return value

An iterator to the inserted element.

Exceptions

If an exception is thrown for any reason, this function has no effect ( strong exception safety guarantee ).

Complexity

Amortized constant on average, worst case linear in the size of the container.

Example

This section is incomplete Reason: no example

See also

emplace	constructs element in-place (public member function)
insert	inserts elements or nodes (since C++17) (public member function)