RE: [sv-bc] Local parameters in parameter-port-list (Mantis 1134)

1134 must address this, one way or another.

Shalom 

> -----Original Message-----
> From: owner-sv-bc@server.eda.org 
> [mailto:owner-sv-bc@server.eda.org] On Behalf Of Gordon Vreugdenhil
> Sent: Tuesday, August 21, 2007 6:59 PM
> To: Jonathan Bromley
> Cc: sv-bc@server.eda-stds.org
> Subject: Re: [sv-bc] Local parameters in parameter-port-list 
> (Mantis 1134)
> 
> See comments below.
> 
> Jonathan Bromley wrote:
> > hi BC,
> > 
> [...]
> 
> > 
> > However, I think this has an unfortunate side-effect.
> > Consider
> > 
> >   module foo
> >    #(
> >       parameter P = 3,
> >       localparam L = P+1,
> >       type T = logic [P:0],
> >       T PT = 5
> >     ) ...
> > 
> > Would you say that T is a localparam or a parameter?
> > What about PT?  And what would users think?
> > (For what it's worth, I think that both T and PT are 
> localparams, but 
> > I think users might be very surprised to find they can't 
> override T.)
> 
> 
> Jonathan,
> 
> At only level I think that following the task/function formal 
> "implied mode/type" rules for subsequent declarations would 
> be consistent.  However, I think that in this case, that 
> leads to very confusing code.
> 
> I would prefer to say something like the following:
>    An ANSI style parameter declaration shall be treated
>    as a "parameter" unless explicitly declared as
>    "localparam".
> 
> 
> I think that "localparam" will be sufficiently rare that I 
> don't mind requiring the more verbose form there in the 
> interest of making the overall form more obvious.
> 
> Gord.
> 
> > 
> > This is precisely the confusion I was trying to avoid by 
> requiring all 
> > localparams to be at the end of the list.
> > 
> > If you're OK with it, then I'll go ahead and update the 
> proposal; the 
> > new proposal will state as a prerequisite that the changes 
> of Mantis 
> > 979 be implemented.
> 
> --
> --------------------------------------------------------------------
> Gordon Vreugdenhil                                503-685-0808
> Model Technology (Mentor Graphics)                gordonv@model.com
> 
> 
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