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: Fri, 16 Dec 2016 09:40:44 +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:32872 Date: 2016-12-16T09:40:44+01:00 List-Id: On 15/12/2016 23:24, Randy Brukardt wrote: > "Dmitry A. Kazakov" wrote in message > news:o2tlcd$1aro$2@gioia.aioe.org... >> 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. > > I just quoted the rules in the RM that say specifically that it is not part > of the body. What the problem? There is time to fix the RM wording. Call it "user specified body" as opposed to the "body in effect". -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de