[plt-scheme] Does anyone use `set!' and `get!' patterns?

From: Eli Barzilay (eli at barzilay.org)
Date: Tue Mar 11 09:36:30 EDT 2008

This is probably the original motivation for this feature.  For
example, with the generic setters in Swindle, you get

  (inc! (cadddr x))

to expand to

  (set-cadddr! x (+ (cadddr x) 1))

and my guess is that with the match setters, it would be like doing

  (let ([x (cdddr x)]) (set-car! x (+ (car x) 1)))

On Mar 11, Robby Findler wrote:
> Yeah, similar, I'd say. Except that here you're also doing a pattern
> match so you have all that going on at the same time.
> Robby
> On Sun, Mar 9, 2008 at 11:54 AM, Joe Wells <jbw at macs.hw.ac.uk> wrote:
> > "Robby Findler" <robby at cs.uchicago.edu> writes:
> >
> >  > No, I don't think so -- get and set patterns aren't just that. They
> >  > bind mutators and gettors to some place down inside some value.
> >
> >  Is this like Common Lisp setf/getf?

          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                  http://www.barzilay.org/                 Maze is Life!

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