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,LOTS_OF_MONEY autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,a644fa9cd1a3869a X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2001-11-21 12:10:53 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!dispose.news.demon.net!demon!shale.ftech.net!news.ftech.net!newspeer.clara.net!news.clara.net!news5-gui.server.ntli.net!ntli.net!news2-win.server.ntlworld.com.POSTED!tinuviel!ramint From: ramatthews@tinuviel.com Newsgroups: comp.lang.ada Subject: Re: List container strawman 1.2 References: <3BECA3B7.5020702@telepath.com><3BF0247D.4500975E@san.rr.com><5BXH7.22252$xS6.34813@www.newsranger.com><3BF052D3.ECEF3FF2@san.rr.com><3BF19FF8.7FE097EF@boeing.com><3BF27410.C899A16B@brighton.ac.uk><3BF3EDE5.FE0ED701@brighton.ac.uk> X-Newsreader: Pan 0.7.6 Message-ID: <700ht9.6k1.ln@127.0.0.1> Date: Wed, 21 Nov 2001 19:40:55 +0000 NNTP-Posting-Host: 62.252.11.80 X-Complaints-To: abuse@ntlworld.com X-Trace: news2-win.server.ntlworld.com 1006373139 62.252.11.80 (Wed, 21 Nov 2001 20:05:39 GMT) NNTP-Posting-Date: Wed, 21 Nov 2001 20:05:39 GMT Organization: ntlworld News Service Xref: archiver1.google.com comp.lang.ada:16816 Date: 2001-11-21T19:40:55+00:00 List-Id: In article , Ted Dennison wrote: > snip... > > We've been down that road. The place it leads is that if you want safe > iterators, you have to make both the indices and the lists controlled and keep a > little mini-list of iterators in each list. The algorithms for doing this > properly aren't unachieveable, but they do make everything quite a bit more > complex. They also create a situation where real-time users will have to be a > lot more careful when they iterate through a list to aviod heap operations. > > The current version takes the opposite stance. I'm wavering quite a bit in my > support for it though. > An implementation of a list that uses 'safe' iterators is now available on: http://homepage.ntlworld.com/ramatthews I have also asked David Bottom to hold a copy on AdaPower. Robert A. Matthews