One of the truly great things about working here is that Distinguished Engineers take time out of their busy schedules to answer random questions. Many thanks to Anders and Scott for sharing their insights.
Incidentally, as I've mentioned before, I'll sometimes ask interview candidates how good a C++ programmer they are on a scale from one to ten. If they say "nine", I'll ask them the kind of question that I asked Scott and see what they say.
(And yes, I was for many years known as "that guy who's always wearing the Tilley hat". I still have many Tilleys at home, but I usually only wear them when I'm sailing now.)