CS代考 (define-struct foo (x lst))

(define-struct foo (x lst))
;; Foo is (make-foo Integer Baz)
(define-struct baz (z lst))
;; Baz is (make-baz Zorker ListOfFoo)

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(define-struct zorker (i j))
;; Zorker is (make-zorker Number Number)
;; ListOfFoo is one of: ;; – empty
;; – (cons Foo ListOfFoo)

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