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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: GNAT GPL 2013 bug?
Date: Fri, 9 Aug 2013 21:27:36 +0200
Organization: cbb software GmbH
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Date: 2013-08-09T21:27:36+02:00
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On Fri, 9 Aug 2013 13:55:40 -0500, Randy Brukardt wrote:

> and the semantics of dispatching require that 
> null is excluded from controlling parameters.

Why? null considered an object is not class-wide, so I see no difference to
plain parameters. null.Foo would be illegal anyway and Foo (null) would be
ambiguous (in presence of several overriding instances).

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