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=ham autolearn_force=no version=3.4.4 X-Google-Thread: a07f3367d7,cb04cee6116c8ced X-Google-Attributes: gida07f3367d7,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news2.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad.highwinds-media.com!news.flashnewsgroups.com-b7.4zTQh5tI3A!not-for-mail Newsgroups: comp.lang.ada Subject: Re: Package's private parts and protected types References: <7ff3810f-3ee3-4f39-a54c-933ad7d0655c@36g2000yqu.googlegroups.com> <1v2la97s2yyvd.1rcy0ana8mver.dlg@40tude.net> <3bb38996-47f7-4f30-8255-f011501404b5@b10g2000yqa.googlegroups.com> <1qttzk1jbh24i$.xid2h7me3oec.dlg@40tude.net> From: Stephen Leake Date: Sat, 13 Feb 2010 03:00:16 -0500 Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (windows-nt) Cancel-Lock: sha1:rn9rcWIdokYlZ7i1rNuQUHwbhUQ= MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Complaints-To: abuse@flashnewsgroups.com Organization: FlashNewsgroups.com X-Trace: 6a1614b765c25e197caa727311 Xref: g2news1.google.com comp.lang.ada:9190 Date: 2010-02-13T03:00:16-05:00 List-Id: Robert A Duff writes: > Stephen Leake writes: > >> Robert A Duff writes: >> >>> Adam Beneschan writes: >>> >>>>...And that >>>> issue exists with GNAT also---you delete some files from your >>>> directory with a wildcard, somehow foo.adb accidentally gets deleted >>>> along with them, and the compiler still thinks your program is OK. >>> >>> Seems unlikely. >> >> Which means it will be very hard/confusing to debug when it does >> happen, since you will not be familiar with the problem. So it is >> important for the tool to handle the unlikely situations nicely. > > I suppose... > >>> Here's a similar issue: One reasonable design pattern is to have >>> a body that contains a type extension, which registers itself >>> into some global data structure. All calls to this thing >>> are indirect (via the parent's 'Class). Nobody needs visibility >>> on this thing, so its spec is completely empty, except for >>> the obligatory pragma Elaborate_Body. Unfortunately, if you >>> forget to 'with' it, it will be silently ignored. >> >> And if you do 'with' it, GNAT will complain that it's unnecessary, so >> you have to put a pragma Warnings (off) on it. QtAda does this for >> some stuff; it's annoying. > > But that's a hugely useful warning. Without it, you end up with > useless 'with's accumulating in your code. An occassional > pragma Warnings is well worth the trouble, IMHO. Yes, I agree. Actually, most of the annoyance is that Emacs Ada mode doesn't understand about the pragma, so when it automatically adds a new with clause, and alphabetically sorts the set of with clauses, it messes things up. So I need to teach Emacs Ada mode how to cope with that better. -- -- Stephe