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=-0.3 required=5.0 tests=BAYES_00,
	REPLYTO_WITHOUT_TO_CC autolearn=no autolearn_force=no version=3.4.4
X-Google-Thread: 103376,c4cb2c432feebd9d
X-Google-Thread: 1094ba,c4cb2c432feebd9d
X-Google-Attributes: gid103376,gid1094ba,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news4.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!cyclone1.gnilink.net!spamkiller.gnilink.net!gnilink.net!trnddc03.POSTED!87bf9b22!not-for-mail
From: Dan Nagle <dannagle@verizon.net>
Reply-To: dnagle@erols.com
Organization: Purple Sage Computing Solutions, Inc.
User-Agent: Thunderbird 1.5.0.2 (X11/20060420)
MIME-Version: 1.0
Newsgroups: comp.lang.ada,comp.lang.fortran
Subject: Re: Ada vs Fortran for scientific applications
References: <mubcg.13522$fb2.853@newssvr27.news.prodigy.net>
 <epcs4e.qb8.ln@hunter.axlog.fr> <tHkcg.6937$kR6.484@trnddc05>
 <0ugu4e.4i7.ln@hunter.axlog.fr>
 <PkHcg.90575$Fs1.7198@bgtnsc05-news.ops.worldnet.att.net>
 <To_cg.10095$S7.4017@news-server.bigpond.net.au>
 <%P_cg.155733$eR6.26337@bgtnsc04-news.ops.worldnet.att.net>
 <6H9dg.10258$S7.9150@news-server.bigpond.net.au>
In-Reply-To: <6H9dg.10258$S7.9150@news-server.bigpond.net.au>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <S8gdg.9145$ix2.6702@trnddc03>
Date: Thu, 25 May 2006 11:02:10 GMT
NNTP-Posting-Host: 70.108.4.182
X-Complaints-To: abuse@verizon.net
X-Trace: trnddc03 1148554930 70.108.4.182 (Thu, 25 May 2006 07:02:10 EDT)
NNTP-Posting-Date: Thu, 25 May 2006 07:02:10 EDT
Xref: g2news2.google.com comp.lang.ada:4448 comp.lang.fortran:10232
Date: 2006-05-25T11:02:10+00:00
List-Id: <comp.lang.ada>

Hello,

robin wrote:
> "Dick Hendrickson" <dick.hendrickson@att.net> wrote in message

<snip>

>> But, if "it" refers to Fortran, subscript bounds rules
>> ARE a feature of the language.
> 
> Subscript bounds checking is not part of the Fortran language.

Can Robin provide an example of a Fortran compiler
available today for Windows, MacOSX or Linux that does _not_
provide a bounds checking option?

>>  You are NEVER allowed to
>> execute an out-of-bounds array reference in a Fortran
>> program.  In practice, the historical run-time cost of
>> checking bounds was [thought to be] too high, so compilers
>> either didn't do it, or did it under some sort of command
>> line option control.
> 
> But in some languages [PL/I included] bounds checking
> is part of the language, and can be controlled by the programmer.
> 
> Subscript checking is an important part of any program.

What's the difference between a programmer controlling a check,
and a programmer setting a compiler option?

-- 
Cheers!

Dan Nagle
Purple Sage Computing Solutions, Inc.