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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Constructors with multiple inheritance
Date: Thu, 29 Sep 2011 22:20:24 +0200
Organization: cbb software GmbH
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Date: 2011-09-29T22:20:24+02:00
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On Thu, 29 Sep 2011 12:40:28 -0700 (PDT), Rego, P. wrote:

> So, the packages are declared as 
>
[...] 
> with Parent_Package;
> procedure Parent_Main is
>    Obj : Parent_Package.Parent_Class_Ptr;
> begin
>    Obj := Obj.Construct;

This is equivalent to:

    Obj := Construct (Obj.all);

But Obj is null.

> So, how can I fix this?

I don't understand your design, but a constructing function of a
non-limited type is just:

   function Construct return Parent_Class;

And you don't need it because it has no parameters. Derive Parent_Class
from Ada.Finalization.Controlled and override Initialize.

P.S. I also see no MI in your design.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de