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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: High-Integrity OO and controlled types
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Date: Tue, 3 May 2011 12:24:41 +0200
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On Tue, 3 May 2011 02:59:05 -0700 (PDT), Maciej Sobczak wrote:

> Controlledness should not be based on tags - it should be a completely
> orthogonal property of the type, without any relation to class-wide
> objects and dispatching calls (see C++ for an example). Interestingly
> this conclusion comes up regularly. Time to fix that part of the
> language, perhaps? ;-)

There are three meaning of being controlled:

1. Ada 83 used it to refer memory allocation (pragma Controlled)
2. Since Ada 95 it is both
2.a. An ability to influence initialization and finalization
2.b. An ability to have a [non-generic] class

Yes, things need to be sorted out.

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