Checking if an iterator is valid

Question

Is there any way to check if an iterator (whether it is from a vector, a list, a deque...) is (still) dereferencable, i.e. has not been invalidated?

I have been usi

Answer 1

if (iterator != container.end()) {
   iterator is dereferencable !
}

If your iterator doesnt equal container.end(), and is not dereferencable, youre doing something wrong.