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=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,ce0900b60ca3f616 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-11-05 11:46:03 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!diablo.theplanet.net!news-hub.cableinet.net!blueyonder!proxad.net!feeder2-1.proxad.net!news2-1.free.fr!not-for-mail Message-ID: <3BE6EBB1.EF463656@free.fr> Date: Mon, 05 Nov 2001 20:42:41 +0100 From: Jean-Marc Bourguet X-Mailer: Mozilla 4.7 [en] (X11; I; Linux 2.2.10 i586) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: List container strawman References: <3BE29AF4.80804@telepath.com> <3BE29BD4.10401@telepath.com> <3BE2DB99.B707D409@boeing.com> <3BE32A18.18404AD1@boeing.com> <3BE443DE.574D669C@acm.org> <3BE58FDD.E1FB1815@san.rr.com> <4LBF7.13535$xS6.17968@www.newsranger.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Organization: Guest of ProXad - France NNTP-Posting-Date: 05 Nov 2001 20:46:02 MET NNTP-Posting-Host: 212.27.54.137 X-Trace: 1004989562 news2-1.free.fr 32590 212.27.54.137 X-Complaints-To: abuse@proxad.net Xref: archiver1.google.com comp.lang.ada:15835 Date: 2001-11-05T20:46:02+01:00 List-Id: Ted Dennison wrote: [...] > The best I could come up with for a Right Thing would be to keep a list of > extant Location pointers in each List object. That way the list itself can go > and invalidate the Location whenever it needs to (probably by flipping some > "valid" boolean in the Location type). Locations would have to be limited for > this to work, so the functions that return locations would have to be changed to > procedures. Why should they be limited? If they are controlled, that should be enough or do I miss something? [...] -- Jean-Marc