[racket-dev] else clauses: possible change to match?

From: Robby Findler (robby at eecs.northwestern.edu)
Date: Fri May 3 10:42:20 EDT 2013

Cond's else cannot change. I agree that that's what I would change if I
could have it back to do it over, but we cannot.

That's the way to perhaps be thinking about racket2, tho.


On Friday, May 3, 2013, Sam Tobin-Hochstadt wrote:

> On Fri, May 3, 2013 at 10:22 AM, Robby Findler
> <robby at eecs.northwestern.edu <javascript:;>> wrote:
> >
> > For this kind of thing, my preference would be to change match than to
> issue
> > a warning. I don't like warnings that are basically admitting weaknesses
> in
> > the language design.... Of course, changing a core thing like that may be
> > more trouble than it is worth, due to backwards compatibility concerns,
> > which is why I think it is worth raising here to see what others think.
> I'm happy to make this change to `match`, except that I've heard
> Matthew say that he would have used a keyword for `else` in `cond` if
> he had it to do over again, and I wouldn't want to change one way, and
> then change back.
> Sam
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