On Mon, Jan 30, 2012 at 3:22 PM, John Clements
<cleme...@brinckerhoff.org> wrote:
> Am I missing something obvious in either of these?

No.  Typed Racket doesn't have type subtraction, which is what you
need in the first case. I'm not sure why the second case isn't working
right; I think the type of `filter' is a little too restrictive.
-- 
sam th
sa...@ccs.neu.edu
____________________
  Racket Users list:
  http://lists.racket-lang.org/users

Reply via email to