26 Containers library [containers]

26.3 Sequence containers [sequences]

26.3.11 Class template vector [vector]

26.3.11.6 vector specialized algorithms [vector.special]

template<class T, class Allocator> void swap(vector<T, Allocator>& x, vector<T, Allocator>& y) noexcept(noexcept(x.swap(y)));
Effects: As if by x.swap(y).