On Aug 29, 2012, at 2:08 PM, Danny Yoo wrote: > I think part of what was interfering with what you were doing earlier > is that the 'color' structure isn't exposed as a structure in > 2htdp/image, but instead is exposed as a HTDP-level primitive.
Which begs the question: why did matching on "make-posn" work? Shouldn't posn be exposed in the same way as color? Or is this something to do with make-color, which does error-checking and has an optional argument with a default value and all sorts of complicated stuff that make-posn doesn't do? Stephen Bloch sbl...@adelphi.edu ____________________ Racket Users list: http://lists.racket-lang.org/users
