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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Preventing Unchecked_Deallocation?
Date: Tue, 07 Feb 2012 18:10:22 -0500
Organization: The World Public Access UNIX, Brookline, MA
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Date: 2012-02-07T18:10:22-05:00
List-Id: <comp.lang.ada>

Alan Copeland <acopeland01@gmail.com> writes:

> On Feb 7, 4:30�pm, Robert A Duff <bobd...@shell01.TheWorld.com> wrote:
>> I don't understand that last sentence. �You don't need pointers
>> (access types) to call primitive operations.
>
> Sure, but from a practical standpoint, what other choice is there?
> You can't save the actual object Z off into an element of both X and Y
> (otherwise you would have two separate objects), so you have to save
> an access value.  That way primitive ops of X and Y can both call
> primitive ops on the same Z.  Unless I'm missing something...

If you want X and Y to share the same Z, then yes, they have to
point at it in some way.  But I still don't see what that has
to do with primitive ops.

You also often need pointers when working with class-wide
objects (you can't have a component type T'Class,
directly).

- Bob