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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: Ada Successor Language
Date: Mon, 25 Jun 2018 17:19:14 +0200
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Xref: reader02.eternal-september.org comp.lang.ada:53304
Date: 2018-06-25T17:19:14+02:00
List-Id: <comp.lang.ada>

On 2018-06-25 16:44, J-P. Rosen wrote:
> Le 25/06/2018 à 16:21, Dmitry A. Kazakov a écrit :

>> Ada could allow T'Class for untagged T. T'Class would be an indefinite
>> type with values consisting of the actual type's tag and its value. When
>> T is by-value type, you pass T'Class to a subprogram as tag + value.
>> When T is by-reference type, you pass tag + reference.
>>
>> Upon dispatch, you strip the tag from the value or reference before
>> passing value/reference down.
> 
> It was a requirement of Ada95 that OOP be strictly contained, and that
> the same typing system as Ada83 be kept for those who don't want OOP.

Don't want OO, don't declare T'Class objects. Where is a problem?

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