How to check if the iterator is initialized?

Question

If I use a default constructor for an iterator, how to check if it was assigned later on?

For pointers, I could do this :

int *p = NULL;
/// some code
         


        

Answer 1

Maybe you should always assign a predefined value, like NULL, after creating the iterator. Later you can easily check against NULL. This will make your code more portable, as you will not depend on what starting values the uninitialized variables take at the beginning.