[r6rs-discuss] [Formal] Inappropriate number of values should be defined

[Martin Gasbichler]

Marcin 'Qrczak' Kowalczyk <qrczak at knm.org.pl> writes:

> John Cowan <cowan at ccil.org> writes:
>
>> 	If an expression supplies too many values to its continuation,
>> 	the excess values are discarded.  If it supplies too few values,
>> 	the deficient values are set to the unspecified value.
>>
>> In particular, this paves the way to eliminating "the unspecified value"
>> in favor of simply returning zero values.
>
> I would prefer to leave this undefined (detected as an error in safe mode)
> *and* replace most uses of the unspecified value with zero values.
> This allows to detect dubious code like:
>    (let ((x (if y (z))))
>      ...)

I agree.

-- 
Martin