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!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: Ada 2012 Constraints (WRT an Ada IR) Date: Thu, 15 Dec 2016 09:48:14 +0100 Organization: Aioe.org NNTP Server Message-ID: References: NNTP-Posting-Host: vZYCW951TbFitc4GdEwQJg.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 X-Notice: Filtered by postfilter v. 0.8.2 Xref: news.eternal-september.org comp.lang.ada:32842 Date: 2016-12-15T09:48:14+01:00 List-Id: On 14/12/2016 23:40, Randy Brukardt wrote: > [Yet again had to break the thread because the thread has gotten too long to > reply to - RLB] > > "Dmitry A. Kazakov" wrote in message > news:o2s8l1$1fef$1@gioia.aioe.org... >> On 2016-12-14 20:23, Shark8 wrote: > ... >>> You are observably wrong. >>> If you supply a negative number, the body of X never executes. >> >> Of course it does. Semantically any effect of a call to X is due to X's >> body. There is nothing else there. > > This is clearly false. The definition of the execution of a subprogram call > (RM 6.4(10/2)) specifically says that the parameter associations are > evaluated before the subprogram body is executed. 6.4.1 says that evaluation > of the parameter associations include the conversion to the formal subtype - > that conversion does the check that raises Constraint_Error. And semantically all this is a part of the body. -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de