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,XPRIO 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!nntp-feed.chiark.greenend.org.uk!ewrotcd!reality.xs3.de!news.jacob-sparre.dk!franka.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail From: "Randy Brukardt" Newsgroups: comp.lang.ada Subject: Re: Ada 2012 Constraints (WRT an Ada IR) Date: Wed, 21 Dec 2016 16:03:27 -0600 Organization: JSA Research & Innovation Message-ID: NNTP-Posting-Host: rrsoftware.com X-Trace: franka.jacob-sparre.dk 1482357809 2357 24.196.82.226 (21 Dec 2016 22:03:29 GMT) X-Complaints-To: news@jacob-sparre.dk NNTP-Posting-Date: Wed, 21 Dec 2016 22:03:29 +0000 (UTC) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-RFC2646: Format=Flowed; Original Xref: news.eternal-september.org comp.lang.ada:32939 Date: 2016-12-21T16:03:27-06:00 List-Id: [Breaking the thread yet again because of too many replies. Sorry.] "Dmitry A. Kazakov" wrote in message news:o3e8nc$593$1@gioia.aioe.org... > On 2016-12-21 01:59, Randy Brukardt wrote: ... >> One certainly can reason about it. > > You can tell nothing about such subsets, they are general case subsets. I suspect that most mathematicians would be surprised to hear that. :-) > They are worse than that, if the constraint is allowed to use non-local > dynamic Boolean functions. That would produce non-sets. As I clearly said before, static_prediates require very restricted expressions that correspond to a compile-time known set. No dynamic anything is allowed (nor are any function calls), which should be obvious from the name alone. Randy.