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: 
 border2.nntp.dca1.giganews.com!nntp.giganews.com!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!feeder.erje.net!1.eu.feeder.erje.net!news.roellig-ltd.de!open-news-network.org!news.muarf.org!news.ecp.fr!news.jacob-sparre.dk!loke.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail
From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: {Pre,Post}conditions and side effects
Date: Mon, 11 May 2015 19:36:43 -0500
Organization: Jacob Sparre Andersen Research & Innovation
Message-ID: <mirhur$l20$1@loke.gir.dk>
References: 
 <2430252d-52a1-4609-acef-684864e6ca0c@googlegroups.com><AnYlw.957256$Rp.242412@fx23.iad><0a718b39-ebd3-4ab5-912e-f1229679dacc@googlegroups.com><wccoaqucn51.fsf@shell01.TheWorld.com><9ee5e186-5aaa-4d07-9490-0f9fdbb5ca18@googlegroups.com><alpine.CYG.2.11.1412231747100.4196@WIL414CHAPIN.vtc.vsc.edu><wccegrpq2om.fsf@shell01.TheWorld.com><87tww5296f.fsf@adaheads.sparre-andersen.dk><871tj9dp5b.fsf@theworld.com><ce4af31e-d491-479f-a5b3-0b3eedea2a68@googlegroups.com><midvq5$2u3$1@loke.gir.dk><alpine.DEB.2.11.1505071103310.14859@debian><migc9a$jp8$1@loke.gir.dk><alpine.DEB.2.11.1505072052570.16448@debian><mijen0$1hj$1@loke.gir.dk>
 <87pp6a1u9w.fsf@jester.gateway.sonic.net>
NNTP-Posting-Host: rrsoftware.com
X-Trace: loke.gir.dk 1431391003 21568 24.196.82.226 (12 May 2015 00:36:43 GMT)
X-Complaints-To: news@jacob-sparre.dk
NNTP-Posting-Date: Tue, 12 May 2015 00:36:43 +0000 (UTC)
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.5931
X-RFC2646: Format=Flowed; Original
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157
Xref: number.nntp.giganews.com comp.lang.ada:193130
Date: 2015-05-11T19:36:43-05:00
List-Id: <comp.lang.ada>

"Paul Rubin" <no.email@nospam.invalid> wrote in message 
news:87pp6a1u9w.fsf@jester.gateway.sonic.net...
> "Randy Brukardt" <randy@rrsoftware.com> writes:
>> For example, in this "Is_Sorted" example, if you are assuming that some
>> object is sorted, then it should have a predicate to that effect.
>
> Randy, is that a real possibility with SPARK--to have a predicate that
> says that an array is sorted and have it verified at compile time by the
> compiler?  I thought SPARK mostly was for proving rather simpler
> conditions.

BTW, I've heard that the SPARK team is working on using Ada 2012 predicates 
in their proofs. So that might be a possibilty soon even if it is not the 
case today.