~ bit-wise unary operator

[Lawrence D'Oliveiro]

In message <87r6klm5fk.fsf at mulj.homelinux.net>, Hrvoje Niksic wrote:

> If you want 16-bit unsigned arithmetic, use 2**16 + ~a, which yields
> 57557.

Or why not use "0xffff ^ a", which returns the same thing.