On Thu, 02 May 2002, Krishnaswami, Neel wrote:
> Markus Mottl [mailto:markus@oefai.at] wrote:
> > I second this. Does anybody here really benefit from such cyclic
> > structures?
> 
> Somewhat to my surprise, I can answer yes:
[snip]
>   | Rec(name, n, body) -> 
>       let rec c = Closure(n, body, r')
>       and r' = (name, c) :: r in
>       c

> Using cyclic structures means I don't have to dink around with 
> mutable references and all the headaches they bring, and so it's
> very handy when prototyping. 

Ok, I agree that this is a nice solution. It's still funny that all
people mentioned environment handling with recursion as only example.
I am not sure whether this is justification enough to have this extra
feature in the language...

Regards,
Markus Mottl

-- 
Markus Mottl                                             markus@oefai.at
Austrian Research Institute
for Artificial Intelligence                  http://www.oefai.at/~markus
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