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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
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13
Task/Abstract-type/Racket/abstract-type.rkt Normal file
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#lang racket
(define animal-interface (interface () say))
(define cat% (class* object% (animal-interface) (super-new))) ;; error
(define cat% (class* object% (animal-interface)
(super-new)
(define/public (say)
(display "meeeeew!"))))
(define tom (new cat%))
(send tom say)