From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: "J-P. Rosen" Newsgroups: comp.lang.ada Subject: Re: was Ada 83 in fact object oriented ? Date: Fri, 25 Sep 2015 13:04:54 +0200 Organization: A noiseless patient Spider Message-ID: References: <1m1z02fnyec2o.wyt86jotmw92.dlg@40tude.net> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 25 Sep 2015 11:02:59 +0000 (UTC) Injection-Info: mx02.eternal-september.org; posting-host="45bffd6a911624777cad79aac3181090"; logging-data="6486"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+Id4THDIggy9nq7MwMsFP7" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 In-Reply-To: <1m1z02fnyec2o.wyt86jotmw92.dlg@40tude.net> Cancel-Lock: sha1:nJY+GvQyqb/0gYVtMSUZls17AnY= Xref: news.eternal-september.org comp.lang.ada:27825 Date: 2015-09-25T13:04:54+02:00 List-Id: Le 25/09/2015 10:43, Dmitry A. Kazakov a écrit : > Another point is that inheritance is an operation that influences the > class. You create a new member of the existing class per inheritance. > Composition is useless for maintaining classes. No wonder, it is not > considered OO. I fully agree that inheritance is necessary to classification. But you implicitely take it for granted that objects are necessarily organized into classes. I argue that you can create good objects, as abstractions of objects of the real world, with proper encapsulation, without classification. Classification is a way of organizing objects, but not the only one. -- J-P. Rosen Adalog 2 rue du Docteur Lombard, 92441 Issy-les-Moulineaux CEDEX Tel: +33 1 45 29 21 52, Fax: +33 1 45 29 25 00 http://www.adalog.fr