On 2015-06-12 17:30:42 -0700, 'John Clements' via users-redirect wrote: > (define-type (HuffJsexpr T) > (U T (HashTable Symbol HuffJsexpr)))
The variant that Alex mentioned should work. I think the only restrictions on recursive types that TR enforces are that it has to be (A) productive, in that there's a real type constructor in the recursive body, and (B) it can't be polymorphic recursive. (A) implies something like (Rec X (U Integer X)) isn't allowed. U doesn't count as a type constructor for this purpose. (B) implies you can't have a type definition like: (define-type (MyType T) (U Integer (MyType (Listof T)))) where the instantiated type changes. Cheers, Asumu -- 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.
