std::unordered_multiset<Key,Hash,KeyEqual,Allocator>::emplace
std::unordered_multiset iterator emplace( Args&&... args );
(constexpr since C++26)
Inserts a new element into the container constructed in-place with the given args.
The constructor of the new element is called with exactly the same arguments as supplied to emplace, forwarded via std::forward <Args>(args)....
If value_type is not EmplaceConstructible into unordered_multiset from args, the behavior is undefined.
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.
[edit] Parameters
[edit] Return value
An iterator to the inserted element.
[edit] Exceptions
If an exception is thrown for any reason, this function has no effect (strong exception safety guarantee).
[edit] Complexity
Amortized constant on average, worst case linear in the size of the container.
[edit] Notes
Careful use of emplace allows the new element to be constructed while avoiding unnecessary copy or move operations.
[edit] Example
Reason: no example