RE: [sv-bc] Assignment operator in continuous assignment

It would have no effect.

It would be like writing

always @(b)
	b = b + 1;

That in itself would not be very useful. 
But one could write

assign b += c ;

which would be like

always @(b,c)
	b = b + c ;

which would trigger if c changed.

Many years ago, we used to sometimes write latches as

assign out = enable ? in : out ;

But I don't think it is useful enough to recommend allowing it.

Shalom

> -----Original Message-----
> From: owner-sv-bc@server.eda.org 
> [mailto:owner-sv-bc@server.eda.org] On Behalf Of Rich, Dave
> Sent: Wednesday, October 10, 2007 9:45 AM
> To: Surya Pratik Saha; sv-bc@server.eda.org; sv-ec@server.eda.org
> Subject: RE: [sv-bc] Assignment operator in continuous assignment
> 
> This is specifically disallowed. What would it mean in terms 
> of sensitivity to have the same variable on both sides of '='?
> 
> Dave
> 
> 
> > -----Original Message-----
> > From: owner-sv-bc@server.eda.org [mailto:owner-sv-bc@server.eda.org]
> On
> > Behalf Of Surya Pratik Saha
> > Sent: Wednesday, October 10, 2007 12:17 AM
> > To: sv-bc@server.eda.org; sv-ec@server.eda.org
> > Subject: [sv-bc] Assignment operator in continuous assignment
> > 
> > Hi,
> > In SV 1800, continuous assignment syntax allows only '=' assignment 
> > operator. Why '+=', '-=' types of assignment operator not 
> allowed. Why 
> > someone can't write:
> > 
> > assign b += 1;
> > 
> > Which is just similar to
> > assign b = b + 1;
> > 
> > Is there any specific reason or is it case of BNF overlook?
> > 
> > --
> > Regards
> > Surya
> > 
> > 
> > 
> > 
> > 
> > 
> > --
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> 
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