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

Even though this question is half a year old, it might still be useful to mention the use of comparison operators > and < to check if you iterated past the end (or the start when iterating back) of the container. For example:

vector vec;
vec.push_back( 1 );
vec.push_back( 2 );

vector::iterator it = vec.begin();

it+=10; //equivalent to advance( it, 10 )
bool isPastEnd = it > vec.end(); //true