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: 103376,501a1c2d3961ac5c X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII Path: g2news2.google.com!news1.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!nntp.club.cc.cmu.edu!micro-heart-of-gold.mit.edu!newsswitch.lcs.mit.edu!nntp.TheWorld.com!not-for-mail From: Robert A Duff Newsgroups: comp.lang.ada Subject: Re: [Not important] the =?utf-8?B?4oCcbm90IG51bGzigJ0=?= notation in Ada 2005 Date: Fri, 25 Mar 2011 11:51:24 -0400 Organization: The World Public Access UNIX, Brookline, MA Message-ID: References: NNTP-Posting-Host: shell01.theworld.com Mime-Version: 1.0 Content-Type: text/plain; charset=macintosh Content-Transfer-Encoding: 8bit X-Trace: pcls6.std.com 1301068285 32330 192.74.137.71 (25 Mar 2011 15:51:25 GMT) X-Complaints-To: abuse@TheWorld.com NNTP-Posting-Date: Fri, 25 Mar 2011 15:51:25 +0000 (UTC) User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix) Cancel-Lock: sha1:KJLZ2TZ6prLBjau8yeM9b92Ix+o= Xref: g2news2.google.com comp.lang.ada:19418 Date: 2011-03-25T11:51:24-04:00 List-Id: "Yannick Duch�ne (Hibou57)" writes: > I remember some peoples says here, this is a pity to have �not null� > annotations, while the case which should be clearly marked, is the one > where a reference may be null. I'm OK with that principle. But > concretely what would have been the notation ? �may be null� ? Two > reserved words added for that ? A simple �null� would not have been > really expressive (just a though I get right a few minutes ago). Take a look at OCaml, for example. - Bob