Hello, I've found out that compose in Typed Racket has the type
(: compose (All (a b c) (-> (-> b c) (-> a b) (-> a c)))) which means that Typed Racket's compose can only combine two functions at a time. In untyped code, I tend to use compose to combine more functions (e.g., 7), so I wrote myself the following definitions: (: compose-n (All (a) (-> (-> a a) * (-> a a)))) (define (compose-n . funcs) (λ (x) (for/foldr ([x x]) ([f funcs]) (f x)))) (: compose-3 (All (a b c d) (-> (-> c d) (-> b c) (-> a b) (-> a d)))) (define (compose-3 f1 f2 f3) (λ (x) (f1 (f2 (f3 x))))) (: compose-4 (All (a b c d e) (-> (-> d e) (-> c d) (-> b c) (-> a b) (-> a e)))) (define (compose-4 f1 f2 f3 f4) (λ (x) (f1 (f2 (f3 (f4 x)))))) Is there a better way to chain compose calls in Typed Racket? If the answer is no, is there any interest in including these three functions (as well as compose-5, 6, 7, 8) into Typed Racket? - Sergiu -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/98bb349f-5de9-4e19-bc7d-d8c2be4d8c9an%40googlegroups.com.