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,c4cb2c432feebd9d X-Google-Attributes: gid103376,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!news.belwue.de!newsfeed.arcor.de!news.arcor.de!not-for-mail Newsgroups: comp.lang.ada Subject: Re: Ada vs Fortran for scientific applications From: Georg Bauhaus In-Reply-To: References: <0ugu4e.4i7.ln@hunter.axlog.fr> <%P_cg.155733$eR6.26337@bgtnsc04-news.ops.worldnet.att.net> <6H9dg.10258$S7.9150@news-server.bigpond.net.au> <1hfv5wb.1x4ab1tbdzk7eN%nospam@see.signature> <2006052509454116807-gsande@worldnetattnet> Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: # Message-ID: <1152525462.6394.4.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Date: Mon, 10 Jul 2006 11:57:42 +0200 NNTP-Posting-Date: 10 Jul 2006 11:55:24 MEST NNTP-Posting-Host: e7497096.newsread2.arcor-online.net X-Trace: DXC=8XO;o\NA;S<;iAbK4FA[l4Q5U85hF6f;4jW\KbG]kaM8GSi?jHD8GO02bUi[E;gBP7UUng9_FXZ=3>:=P9Ihe`B8@Z?dZ]MOid5 X-Complaints-To: usenet-abuse@arcor.de Xref: g2news2.google.com comp.lang.ada:5592 Date: 2006-07-10T11:55:24+02:00 List-Id: On Sun, 2006-07-09 at 21:36 +0000, James Giles wrote: > Determining whether a variable is defined or not is a > complex problem. It's made worse by the fact that the user can > make the error message go away (though not usually the problem) > by initializing the variable in the declaration. SPARK is a subset of Ada that addresses these and other issues. The SPARK tools provide path analysis, information flow analysis, etc., leading to a proof of properties of the analysed program. This comes at a price, though, as SPARK cannot handle full Ada (being a subset language). -- Georg