std::vector<T,Allocator>::clear (3) - Linux Manuals

std::vector<T,Allocator>::clear: std::vector<T,Allocator>::clear


std::vector<T,Allocator>::clear - std::vector<T,Allocator>::clear


void clear(); (until C++11)
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. Any past-the-end iterators are also invalidated.
Leaves the capacity() of the vector unchanged (note: the standard's restriction on the changes to capacity is in the specification of vector::reserve, see [1])



Return value



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_2231 C++11 complexity guarantee was mistakenly omitted in C++11 complexity reaffirmed as linear

See also

      erases elements
erase (public member function)