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: 103376,ad06d2d7cb045687 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Received: by 10.68.226.10 with SMTP id ro10mr9083896pbc.6.1328453404666; Sun, 05 Feb 2012 06:50:04 -0800 (PST) Path: lh20ni263477pbb.0!nntp.google.com!news2.google.com!news.glorb.com!xmission!newsswitch.lcs.mit.edu!nntp.TheWorld.com!not-for-mail From: Robert A Duff Newsgroups: comp.lang.ada Subject: Re: Silly and stupid post-condition or not ? Date: Sun, 05 Feb 2012 09:50:01 -0500 Organization: The World Public Access UNIX, Brookline, MA Message-ID: References: <82wr86fzos.fsf@stephe-leake.org> <5af407fc-2868-44ca-84d2-c51a2a64104d@o4g2000pbc.googlegroups.com> <82k445fu9n.fsf@stephe-leake.org> NNTP-Posting-Host: shell01.theworld.com Mime-Version: 1.0 X-Trace: pcls6.std.com 1328453401 28296 192.74.137.71 (5 Feb 2012 14:50:01 GMT) X-Complaints-To: abuse@TheWorld.com NNTP-Posting-Date: Sun, 5 Feb 2012 14:50:01 +0000 (UTC) User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix) Cancel-Lock: sha1:5KmAcRwa9mvau8o5jPMRtJVpdys= Content-Type: text/plain; charset=us-ascii Date: 2012-02-05T09:50:01-05:00 List-Id: "Randy Brukardt" writes: > People forget that Ada uses "access types" rather than "pointers", A rose by any other name... >...and the > reason for that is that access types are type-safe (in the absence of > erroneous execution, anyway). That's like saying, "Drunk driving is safe so long as you don't crash." Type safety means "can't cause erroneous (unpredictable, undefined) execution". - Bob