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!news.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Why can't Ada use dot notation on private types? Date: Sun, 5 Feb 2017 16:31:49 +0100 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: BYuA7L7MRjuLLjcoGHOBxw.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 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:33258 Date: 2017-02-05T16:31:49+01:00 List-Id: On 2017-02-05 15:17, Lucretia wrote: > A lot of people dislike the fact that you cannot use dot notation on > a tagged type if it's private. Is there a reason for this? Surely the > compiler knows it's tagged when it looks it up? I don't know why it is tied to certain types. Surely it is a syntactic property of an argument of a subprogram. It must be user-defined. There is nothing here specific for tagged types, except that for a primitive operation all its instances could share the property if the argument is controlling, which again, is merely a convenience rule. P.S. if Ada had record type interface, member operations would be a part of the interface. No magic needed. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de