RE: [sv-ec] Arrays of events

Note that 1364-2005 says, 
"An event is not made to occur by changing the index of an event array
in an event control expression."

Shalom


> -----Original Message-----
> From: owner-sv-ec@server.eda.org [mailto:owner-sv-ec@server.eda.org]
On
> Behalf Of Steven Sharp
> Sent: Wednesday, September 13, 2006 12:04 AM
> To: sv-ec@server.eda-stds.org; Dave_Rich@mentor.com
> Subject: Re: [sv-ec] Arrays of events
> 
> 
> >From: "Rich, Dave" <Dave_Rich@mentor.com>
> 
> >Is this simply a BNF oversight or is this an intentional omission.
> Seems
> >to me that if you can declare an array of events, you should be able
to
> >trigger an element of an array.
> 
> I don't see any possible use for an array of events if you can't
trigger
> one of them.
> 
> BTW, there are some issues with arrays of events that were not
> considered
> when they were added in 1364.  They appear because of the possibility
> that
> the event referenced by an array reference could change if the value
of
> the index changes.  The same issue occurs in 1800 with the ability to
> assign an event to another event.  You have to define what it means to
> wait on an event in that situation.  There is no analog in the rules
for
> other things in event controls, because those are based on whether the
> value changed, and named events do not have values.
> 
> Steven Sharp
> sharp@cadence.com