> On Dec 12, 2016, at 1:31 PM, Alex Knauth <alexan...@knauth.org> wrote:
> 
> #lang typed/racket
> 
> (define ls (port->list read (open-input-string "1 2 3 4")))
> (for ([n (assert ls (λ ([ls : (Listof Any)]) (andmap number? ls)))])
>  (displayln (* n n)))
> 


I think this suggests that TR should possibly supply typed I/O so that one 
could write 

 (port->list: number? read some-port) 

— Matthias

-- 
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.
For more options, visit https://groups.google.com/d/optout.

Reply via email to