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!news.eternal-september.org!.POSTED!not-for-mail From: Simon Clubley Newsgroups: comp.lang.ada Subject: Re: Oberon and Wirthian languages Date: Sat, 19 Apr 2014 19:17:30 +0000 (UTC) Organization: A noiseless patient Spider Message-ID: References: <1ljwj8f.1wqbhvuabsdw1N%csampson@inetworld.net> <51c7d6d4-e3be-44d5-a4ce-f7e875345588@googlegroups.com> <%J32v.70539$kp1.45343@fx14.iad> <8761m535e4.fsf_-_@ludovic-brenta.org> <5352703a$0$6705$9b4e6d93@newsspool2.arcor-online.net> Injection-Date: Sat, 19 Apr 2014 19:17:30 +0000 (UTC) Injection-Info: mx05.eternal-september.org; posting-host="e458ff8b81bc0c159989eb0e36c6e372"; logging-data="31540"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX18aEeBwPXxmcia3cEHz2cHXWCzksKa1eNM=" User-Agent: slrn/0.9.8.1 (VMS/Multinet) Cancel-Lock: sha1:9dfcM/HIHVycNXyz/BBanHboLvs= Xref: news.eternal-september.org comp.lang.ada:19445 Date: 2014-04-19T19:17:30+00:00 List-Id: On 2014-04-19, Georg Bauhaus wrote: > On 19/04/14 13:50, Ludovic Brenta wrote: >> Access types are required no matter what :/ > > Parasail (and some other experimental languages, I think) seem > to tackle pointing with the help of components marked "optional", > accompanied by specially designed definitions for copying, moving, and > swapping. This combination is said to prevent the dangers of pointers. > > http://parasail-programming-language.blogspot.de/2012/08/a-pointer-free-path-to-object-oriented.html > >From what I can tell from that page, they still appear to be implemented as pointers but it's just that this isn't directly visible at user code level. I wonder where I've heard of the concept of type checked pointers before ? :-) (IOW, look at the author's name; I didn't see that until well into the page.) Simon. -- Simon Clubley, clubley@remove_me.eisner.decus.org-Earth.UFP Microsoft: Bringing you 1980s technology to a 21st century world