RE: [sv-ec] {}

I still don't understand the use of empty concatenations. We already allow zero replications as part of a non-empty concatenation. What would such an enhancement give? Educate me.

Shalom 

> -----Original Message-----
> From: Steven Sharp [mailto:sharp@cadence.com] 
> Sent: Wednesday, July 29, 2009 6:01 AM
> To: Bresticker, Shalom; jonathan.bromley@doulos.com
> Cc: sv-ec@eda.org
> Subject: RE: [sv-ec] {}
> 
> 
> >There still needs to be a normative footnote in Annex A
> >pointing out that {} is legal only as a UAC.... unless
> >there's a desire to permit empty concatenations.  I can
> >imagine the latter might, just possibly, be useful in 
> >the same way that null array slices are useful in VHDL.
> 
> Before empty concatenations could be allowed, a lot of work would
> need to be done to define the behavior of zero-width vectors.  I
> would rather not go there.
> 
> Steven Sharp
> sharp@cadence.com
> 
> 
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