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!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: changing rules for anonymous access types to named ones Date: Tue, 3 Apr 2018 14:44:33 +0200 Organization: Aioe.org NNTP Server Message-ID: References: <8611490c-13be-41fe-a5ef-9403bb196bbf@googlegroups.com> NNTP-Posting-Host: MyFhHs417jM9AgzRpXn7yg.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 Content-Language: en-US X-Notice: Filtered by postfilter v. 0.8.3 Xref: reader02.eternal-september.org comp.lang.ada:51316 Date: 2018-04-03T14:44:33+02:00 List-Id: On 03/04/2018 13:29, Jean-Claude Rostaing wrote: >> type My_Custom_Integer is new Integer'Interface with record >> -- Whatever I see appropriate to represent integer >> end record; >> -- overriding all operations, since they are inherited abstract > If you want a view conversion INTEGER(any_type_inheriting_INTEGER'Interface) to works, That is an upcast conversion since Integer'Interface'Class is not in Integer'Class. > you should also inheriting also all attributes of Integer, or of any numeric type which providing the interface ? Yes. All object attributes should have been primitive operations. Type attributes are free operations. > But I suppose your model could work if you were to limit 'Interface to tagged types, records tasks and protected types. For by-value types conversion T -> T'Class is a full conversion. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de