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From: lutz@iks-jena.de (Lutz Donnerhacke)
Newsgroups: comp.lang.ada
Subject: Re: How to avoid unreferenced objects (mutexes etc)
Date: Thu, 17 Jan 2002 09:19:59 +0000 (UTC)
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* Dmitry A. Kazakov wrote:
>I believe it is worth to allow that for all types, i.e. to allow
>overriding a non-abstract subroutine with an abstract one. A
>dispatching call to a disallowed subprogram will then raise an
>exception [like when tags of arguments are different].

I strongly discourage from such a change. Class wide programming using
abstract tagged types are used for the guarantee of a working interface.