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Date: Sun, 3 Dec 2017 07:10:59 -0800 (PST)
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Subject: Re: Extending a third party tagged type while adding finalization
From: AdaMagica <christ-usch.grein@t-online.de>
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Xref: reader02.eternal-september.org comp.lang.ada:49330
Date: 2017-12-03T07:10:59-08:00
List-Id: <comp.lang.ada>

Am Sonntag, 3. Dezember 2017 10:29:07 UTC+1 schrieb Dmitry A. Kazakov:
>     type T is new Ada.Finalization.Controlled with record
>        Self : not null access T'Class;
>     end record;
>     procedure Initialize (X : in out T);
>     procedure Foo (X : in out T) is abstract;
> 
>     type S is new T with ...
>     overriding procedure Foo (X : in out S);
> 
>     procedure Initialize (X : in out T) is
>     begin
>        X.Self.Foo; -- Boom!
>     end Initialize;

Again an example of cryptic code I do not understand what it is aimed at to demonstrate. All I can see is that it is illegal Ada.