What happens if you increment an iterator that is equal to the end iterator of an STL container

Question

What if I increment an iterator by 2 when it points onto the last element of a vector? In this question asking how to adjust the iterator to an STL container by 2 elements t

Answer 1

The code that Marijn suggests is just slightly wrong (as curiousguy pointed out).

The correct version of the last line is:

bool isPastEnd = it >= vec.end();

Answer 2

I suggest you to take a look at Boost.Range.
It might be safer to use.
It will also be in C++0x.