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: 103376,1552407353207252 X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news4.google.com!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!newsread2.news.pas.earthlink.net.POSTED!a6202946!not-for-mail From: "Jeffrey R. Carter" Organization: jrcarter at acm dot org User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050915 X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Re: Range constraints on subprogram parameters? References: In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Date: Fri, 30 Sep 2005 05:46:06 GMT NNTP-Posting-Host: 67.3.213.152 X-Complaints-To: abuse@earthlink.net X-Trace: newsread2.news.pas.earthlink.net 1128059166 67.3.213.152 (Thu, 29 Sep 2005 22:46:06 PDT) NNTP-Posting-Date: Thu, 29 Sep 2005 22:46:06 PDT Xref: g2news1.google.com comp.lang.ada:5296 Date: 2005-09-30T05:46:06+00:00 List-Id: Bobby D. Bryant wrote: > Yes, that's what I was wanting. > > It occurs to me in retrospect that it would be problematic from a > language design perspective, since it would be impossible to enforce > at compile time. It doesn't have to be enforceable at compile time, since subtype constraints don't have to be static: procedure Outer (Max : in Positive) is subtype Num is Positive range 1 .. Max; procedure Inner (X : in Num) is is perfectly legal. It mostly depends on where the subprogram is declared compared to where the constraints are known. -- Jeff Carter "There's no messiah here. There's a mess all right, but no messiah." Monty Python's Life of Brian 84