Hi,
I was wondering if someone could help me understand the problem with the
following code?
(struct: obj ([a : Integer] [b : Symbol]))
(: f1? (obj Symbol -> Boolean))
(define (f1? o x)
(and (= 0 (obj-a o))
(eq? x (obj-b o))))
(: f2? (obj Symbol -> Boolean))
(define (f2? o x)
(and (zero? (obj-a o))
(eq? x (obj-b o))))
(: f3? (obj Symbol -> Boolean))
(define (f3? o x)
(and (eq? x (obj-b o))
(zero? (obj-a o))))
It looks like f1 and f3 are ok, but f2 has the error "Type Checker: Expected
obj, but got #(struct:#<syntax:3:9 obj> ((U Inexact-Complex Real-Zero) Symbol))
in: o".
Thanks,
Erik
____________________
Racket Users list:
http://lists.racket-lang.org/users
