From: NiGHTS <nights@unku.us>
Subject: Re: Error: "non-local pointer cannot point to a local object"
Date: Wed, 12 Sep 2018 07:47:53 -0700 (PDT)
Date: 2018-09-12T07:47:53-07:00 [thread overview]
Message-ID: <9a44824f-2897-48f0-92b1-3e9528147ef6@googlegroups.com> (raw)
In-Reply-To: <pnaf3k$1kv6$1@gioia.aioe.org>
On Wednesday, September 12, 2018 at 3:26:46 AM UTC-4, Dmitry A. Kazakov wrote:
> What goal? It looks like a bad design. Copying pointers to integers is
> asking for trouble.
The integer was chosen to simplify the example. In the actual application it is a tree container, where there is a single thread that is expected to manipulate various contexts of the same tree, thus multiple working records for the same tree.
>
> BTW, if you used Ada.Finalization.Controlled, as you likely should, and
> derived one record from another then default copying before Adjust would
> copy pointer too. What would happen with access info, I have no idea,
> probably copied as-is. (Yet another reason not to use anonymous access
> types inside records unless for Rosen's trick or access-to-constant)
>
While my example does not show Ada.Finalization.Controlled in use, my application's record indeed is derived from this object. Still, I am not sure how overriding Adjust would be applied to my example. Would you show me a quick and dirty example of how this would be done?
> --
> Regards,
> Dmitry A. Kazakov
> http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2018-09-12 14:47 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-11 22:20 Error: "non-local pointer cannot point to a local object" NiGHTS
2018-09-12 1:49 ` Brad Moore
2018-09-12 14:41 ` NiGHTS
2018-09-12 6:05 ` rakusu_klein
2018-09-12 14:42 ` NiGHTS
2018-09-12 7:26 ` Dmitry A. Kazakov
2018-09-12 14:47 ` NiGHTS [this message]
2018-09-12 15:22 ` Dmitry A. Kazakov
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