Erasing vector::end from vector

Question

Does it works correct(does nothing) when I use

 vector v;
 v.erase(v.end());

I want to use something like

 v.erase         


        

Answer 1

Erasing end() (or for that matter, even looking at the target of end()) is undefined behavior. Undefined behavior is allowed to have any behavior, including "just work" on your platform. That doesn't mean that you should be doing it; it's still undefined behavior, and I'll come bite you in the worst ways when you're least expecting it later on.

Depending on what you're doing, you might want to consider set or unordered_set instead of vector here.