When you write (mixin (drracket:unit:frame<%>) (drracket:unit:tab<%>) ;; body ...)
This produces a function that takes classes which implement the drracket:unit:frame<%> interface and produces classes that implement the drracket:unit:tab<%> interface. In the body of the mixin you can only assume that you have a class which implements drracket:unit:frame<%>, and you will need to implement the methods that are required by the drracket:unit:tab<%> interface, so you can't assume that those methods are available in the body of the mixin. I hope this helps, if not could you post an example program which is causing the trouble, Dan On Wed, Aug 10, 2016 at 4:11 AM, Normal Loone <andreas.m.wi...@gmx.de> wrote: > The Documentation talks about range of classes, and I am not really sure > what that means. > Above would then be everything between frame and tab? But why cant I then > not use frame functions in the implementation? > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
