Andy Wingo <wi...@pobox.com> skribis: > One place you might want to use them though is in type checks for Scheme > code. We currently don't do very much of that, but probably should in > the future. As in: > > (define (parameter-fluid p) > (unless (parameter? p) (wrong-type-arg p 'parameter)) > (struct-ref p 1)) > > The advantage of `unless' over `if' is that the wrong-type-arg is not > called in tail position, so the error message sees `parameter-fluid' on > the stack.
Oh, interesting, good point! Ludo’.
