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Re: [Scheme-reports] multiple values module

On Wed, 25 May 2011 22:47:46 -0400, Eli Barzilay <eli@x> wrote:

> 7 hours ago, Aaron W. Hsu wrote:
>> On Wed, 25 May 2011 11:07:25 -0400, Eli Barzilay <eli@x>  
>> wrote:
>> > 15 minutes ago, Alex Shinn wrote:
>> >>
>> >> It was known behavior, left in place mostly because I didn't
>> >> actually care  Any Scheme that behaves like Chibi in this case can
>> >> be fixed with: [...]  The actual fix in Chibi was just one line,
>> >> [...]
>> > The question is still open, AFAICT: is the pre-fix problem something
>> > that is fine to have in an r5/7rs?  According to John, your bug fix
>> > was not needed.
>> From my reading of the R5RS, I concur with John that the original
>> behavior of Chibi was not breaking compliance with the standard.
>> That is, R5RS and R6RS both allow implementations to do *whatever*
>> they want if a continuation expecting a single value receives more
>> than one value.
> That's *not* the chibi problem that I talked about.  To repeat:
>   (call-with-values
>     (lambda ()
>       (call-with-current-continuation (lambda (k) (k 1 2 3))))
>     (lambda (x y z) 'ok))
> the problem here is that the `k' continuation is one that expects
> three values, and it is given three values.

According to Alex, this bug is fixed in the head of the Chibi source, so I  
mistakenly assumed you were talking about the other remaining issues with  
Chib's multiple values semantics. Keeping track of the timestamps on all  
of these messages can be...trying.

	Aaron W. Hsu

Programming is just another word for the lost art of thinking.

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