[boost] [intrusive.set] Accessing the last (largest) element.

Since there is no "back" method for intrusive set, what's the best way to access the last (greatest) element? Is this OK:? IntrusiveSet set1; IntrusiveSet::iterator itEnd = set1.end(); //Make sure that set isn't empty. Value v = *--itEnd; ++itEnd; //will itEnd point to set1.end() after this? In general, is there anything sinister about this construct? (provided that the set isn't empty) Thanks, Andy.