std::unordered_multimap<Key,T,Hash,KeyEqual,Allocator>::clear
From cppreference.com
< cpp | container | unordered multimap
void clear() noexcept; |
(since C++11) | |
Erases all elements from the container. After this call, size() returns zero.
Invalidates any references, pointers, or iterators referring to contained elements. May also invalidate past-the-end iterators.
Parameters
(none)
Return value
(none)
Complexity
Linear in the size of the container, i.e., the number of elements.
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR | Applied to | Behavior as published | Correct behavior |
---|---|---|---|
LWG 2550 | C++11 | for unordered associative containers, unclear if complexity is linear in the number of elements or buckets | clarified that it's linear in the number of elements |
See also
erases elements (public member function) |