[r6rs-discuss] Where is the type predicate for enumerations?

[Abdulaziz Ghuloum]

On Aug 7, 2008, at 4:35 PM, Göran Weinholt wrote:

> first time poster, long time reader. I just noticed that there is no
> `enum-set?' function. Is this an error in R6RS, or how do I check if
> something is an enumeration?


I think it's an error in R6RS.  Until it's fixed (or not), you can
probably do:

(define (enum-set? x)
   (guard (con [else #f])
     (enum-set-subset? (make-enumeration '()) x)))

and ask your implementor to export enum-set?.