[racket] How to use abstract classes?

You could use a mixin. http://docs.racket-lang.org/reference/mixins.html?q=mixin&q=class#(form._((lib._racket/private/class-internal..rkt)._mixin))

On 08/24/2011 08:31 AM, Alexander Kasiukov wrote:
> Dear Racket users,
>
> What is the best way to make a class in Racket abstract? I would like to have a class which
>
>     never gets instantiated
>     implements certain methods common to all of its children
>     needs to call some of the methods implemented in the children.
>
> Sincerely yours,
> Alex
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