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,FREEMAIL_FROM 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!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: Victor Porton Newsgroups: comp.lang.ada Subject: Re: Type invariants and private extensions? Date: Tue, 12 Sep 2017 01:00:30 +0300 Organization: Aioe.org NNTP Server Message-ID: References: <364ff8e0-c7dd-4980-b19f-5d438edd8353@googlegroups.com> <7df81b3c-1fde-4395-8b9b-1a945820a7f7@googlegroups.com> NNTP-Posting-Host: qUTqmJlZKcITHxg9FVl9Fw.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Complaints-To: abuse@aioe.org User-Agent: KNode/4.14.10 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:48022 Date: 2017-09-12T01:00:30+03:00 List-Id: Egil H H wrote: > On Monday, September 11, 2017 at 11:27:54 PM UTC+2, Victor Porton wrote: >> >> type T1 is new T with null record >> with Type_Invariant => True; >> >> > > Like I said, Type_Invariant'Class... It seems that you don't understand me: I need different boolean functions for different derived tagged types. If we specify Type_Invariant or Type_Invariant'Class this is the same function because it can be specified only for the base class not my derived classes. Or maybe I do not understand you? If so, please explain. Hm, well, Type_Invariant'Class may point to dispatching function which can be overridden in the derived classes. Isn't it what you mean? -- Victor Porton - http://portonvictor.org