Oh, I see why. 'color' is bound using define-primitive in order to cooperate with the beginner language (and so that 'color' can be a constructor). But doing that interferes with the usual information bound by a struct that match picks up.
I'm not sure what the right way to resolve this is. Robby On Mon, Oct 31, 2011 at 9:39 PM, Robby Findler <ro...@eecs.northwestern.edu> wrote: > Is make-color coming from 2htdp/image? I see that's not working (not > sure why yet). > > Robby > > On Mon, Oct 31, 2011 at 9:34 PM, Adam Shaw <adams...@cs.uchicago.edu> wrote: >> Thanks! That still doesn't work for color: >> match: color does not refer to a structure definition >> although it does work with my own custom color struct: >> (define-struct clr (r g b)) >> (match (make-clr 1 2 3) >> [(struct clr (r g b)) (* r g b)]) >> - Adam >> On Oct 31, 2011, at 9:26 PM, Jay McCarthy wrote: >> >> One of the branches of the pattern language is >> >> | (struct id (pattern ...)) >> >> Your pattern should be >> >> (struct color (r g b)) >> >> >> _________________________________________________ >> For list-related administrative tasks: >> http://lists.racket-lang.org/listinfo/users >> > _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
