Re: Package Instances???

["Marin David Condic" <dont.bother.mcondic.auntie.spam@[acm.org>]

Sounds like you're trying to treat a package as if it was a C++ class and
you're trying to create a new instance of it because it presumably holds a
set of variables you want to duplicate? First, as you discovered, you can't
do that. Second, it isn't really the right idiom for Ada.

The way to do it would be to have a record type declared in the package that
holds all your variables. Then you create objects of the record type & use
the operations contained in the package on the individual objects of that
type. Something like this:

package My_Package is
    type My_Rec is record
        A    : Integer ;
        B    : Integer ;
        C    : Integer ;
    end record ;
    function Some_Operation (Rec : My_Rec) return Integer ;
end My_Package ;

--  Then in the unit that uses it...

X : My_Package.My_Rec ;  --  One instance of the A, B, C variables
Y : My_Package.My_Rec ;  --  A whole different instance of them.
.......
--  Operates on X.A, X.B, X.C
Some_Int := My_Package.Some_Operation (X) ;
.......
--  Operates on Y.A, Y.B, Y.C
Another_Int := My_Package.Some_Operation (Y) ;
.......


If that's what you were trying to accomplish, I hope this clarifies. If it
was something else, see if you can explain what you are trying to do and
maybe we can help you find The Ada Way of doing it.

MDC
--
Marin David Condic
Senior Software Engineer
Pace Micro Technology Americas    www.pacemicro.com
Enabling the digital revolution
e-Mail:    marin.condic@pacemicro.com
Web:      http://www.mcondic.com/


"Yates" <yates_1900@yahoo.com> wrote in message
news:721b6d80.0202131302.1ccce2ed@posting.google.com...
> I am new to Ada. I'd like to know if it is possible to create multiple
> instances of a package. For example, if I have a package 'My_Package',
can
> I do something like:
>
> p1 : My_Package := new My_Package
> p2 : My_Package := new My_Package
> .....
>
> I tried this and didn't work. Is there other ways to do it?
>
> Thanks
>
> Yates