Eh? There's the NVI comparison operator that fits that bill and maybe the std::forward_iterator one but the rest? Most of the other fixes was less code that's a

Eh? There's the NVI comparison operator that fits that bill and maybe the std::forward_iterator one but the rest? Most of the other fixes was less code that's also simpler. Or are you getting thrown off by things like the enum slides where it's 3 different solutions all presented on a single slide?