[sv-ec] RE: [sv-bc] Final blocks in packages

Responding to just sv-ec to keep the traffic down,

I talked with Doug earlier today and we came to the conclusion that
calling a constructor is no different than initializing any kind of
variable with a function call, all of which is currently legal.

What's currently illegal in a package is anything within the language
that creates a thread. The PLI, of course, can do lots of things that
can't be done through the source text.

Dave




> -----Original Message-----
> From: owner-sv-bc@server.eda.org [mailto:owner-sv-bc@server.eda.org]
On
> Behalf Of Brad Pierce
> Sent: Monday, May 15, 2006 12:40 PM
> To: sv-ec@server.eda.org
> Cc: sv-bc@server.eda.org
> Subject: Re: [sv-bc] Final blocks in packages
> 
> Doug,
> 
> Is it legal today to initialize class variables in a package scope?
> 
> -- Brad
> 
> -----Original Message-----
> From: Warmke, Doug [mailto:doug_warmke@mentor.com]
> Sent: Monday, May 15, 2006 7:57 AM
> To: Vreugdenhil, Gordon; Brad Pierce
> Cc: sv-bc@eda.org
> Subject: RE: [sv-bc] Final blocks in packages
> 
> Hi all,
> 
> One question that has come to my mind during this debate:
> 
>    How useful do folks feel it would be to allow the initialization
>    of class variables declared in package scope?
> 
> I can personally envision some uses of that construct.
> But I'm wondering if other people are already using it
> or are planning on using it?  If it turns out to be a very
> useful or high demand feature, it will be worth investing
> some time into exploring "threads in packages" more deeply.
> 
> If folks don't care about it too much, then we should lower the
> priority on the discussion.
> 
> One thing to watch out for, though, is letting the barn door open
> too early.  If some implementations do allow the use of "new" in
> package VDA's, then we will likely have to deal with all this at
> some point in the future, and it could be thorny.
> 
> Regards,
> Doug
> 
> 
> 
> > -----Original Message-----
> > From: owner-sv-bc@server.eda.org
> > [mailto:owner-sv-bc@server.eda.org] On Behalf Of Vreugdenhil, Gordon
> > Sent: Wednesday, May 10, 2006 10:15 AM
> > To: Brad Pierce
> > Cc: sv-bc@server.eda.org
> > Subject: Re: [sv-bc] Final blocks in packages
> >
> >
> >
> > Brad Pierce wrote:
> >
> > > Do variable declaration assignments in a package occur only if the
> > > variable is imported?
> >
> >
> > If the "variable" is imported?  No - that would be far to fine a
> > granularity to handle.  Package dependencies are determined
> > at the "package" level -- as far as I am concerned, if a package
> > is used in the design (referenced in an import or included via
> > some other vendor mechanism) then all of its initializations
> > occur.  A reference to the package is sufficient -- no actual
> > import needs to occur.  Obviously, as with any declaration, if the
> > effect of the initialization is not observable in the design,
> > an implementation can optimize such initialization away.
> >
> >
> > Gord.
> >
> >
> > >
> > >
> > >
> > > -- Brad
> > >
> > >
> > >
> > >
> > --------------------------------------------------------------
> > ----------
> > >
> > > From: Rich, Dave [mailto:Dave_Rich@mentor.com]
> > > Sent: Tuesday, May 09, 2006 6:40 PM
> > > To: Brad Pierce; sv-bc@eda.org
> > > Subject: RE: [sv-bc] Final blocks in packages
> > >
> > >
> > >
> > > Does someone have to import the package or refer to an item
> > in a packed
> > > for the final block to execute? I would think so; otherwise
> > it would be
> > > difficult to manage the exclusion of packages that you did
> > not want to
> > > execute.
> > >
> > >
> > >
> > > Independently of whether final blocks in packages are a
> > "good idea", I
> > > don't think it is a priority worth discussing right now.
> > >
> > >
> > >
> > > Dave
> > >
> > >
> > >
> > >
> > >
> > >
> > --------------------------------------------------------------
> > ----------
> > >
> > > From: owner-sv-bc@server.eda.org
> > [mailto:owner-sv-bc@server.eda.org] On
> > > Behalf Of Brad Pierce
> > > Sent: Tuesday, May 09, 2006 6:29 PM
> > > To: sv-bc@server.eda.org
> > > Subject: Re: [sv-bc] Final blocks in packages
> > >
> > >
> > >
> > > Following up on http://www.eda.org/sv-bc/hm/4421.html ,
> > does any extra
> > > text need to be added to explain how final blocks in
> > packages execute?
> > >
> > >
> > >
> > > In my opinion, no.  I think it would be sufficient for a
> > proposal only
> > > to add final blocks to the 19.2 list of items that can be
> > shared via
> > > packages and in the BNF to move "final_construct" out of
> > its current
> > > locations and into "package_or_generate_item_declaration".
> > >
> > >
> > >
> > > Independently of whether final blocks in packages is a
> > "good idea", does
> > > the above seem like a sufficient way to modify the LRM if it were?
> > >
> > >
> > >
> > > -- Brad
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> > --
> > --------------------------------------------------------------------
> > Gordon Vreugdenhil                                503-685-0808
> > Model Technology (Mentor Graphics)                gordonv@model.com
> >