In case anyone has the same difficulty reading this as I did, "integer types that wrap" is supposed to refer to arithmetic modulo 2^n. I thought at first he was talking about wrapped integer types.
A google search for "wrapped integer types" gives me the Wikipedia article on Integer Overflow as its first result. The other hits seem to be related.
What else do you mean by "wrapped integer types" if not arithmetic modulo 2^n?
simcop2387 is correct that I assumed he was talking about boxing at first.