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-Thread: 1094ba,c4cb2c432feebd9d
X-Google-Thread: 101deb,15c6ed4b761968e6
X-Google-Attributes: gid103376,gid1094ba,gid101deb,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: 
 g2news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail
NNTP-Posting-Date: Tue, 11 Jul 2006 10:15:56 -0500
Date: Tue, 11 Jul 2006 08:16:28 -0700
From: glen herrmannsfeldt <gah@ugcs.caltech.edu>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US;
 rv:1.4) Gecko/20030624 Netscape/7.1 (ax)
X-Accept-Language: en-us, en
MIME-Version: 1.0
Newsgroups: comp.lang.ada,comp.lang.fortran,comp.lang.pl1
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>
 <XVadg.76594$_S7.45873@newssvr14.news.prodigy.com>
 <1hfv5wb.1x4ab1tbdzk7eN%nospam@see.signature>
 <pan.2006.05.25.12.11.52.919554@linuxchip.demon.co.uk.uk.uk>
 <2006052509454116807-gsande@worldnetattnet>
 <R%dsg.63336$fb2.7555@newssvr27.news.prodigy.net>
 <bFesg.111860$mF2.27790@bgtnsc04-news.ops.worldnet.att.net>
 <1kzktalo9krea$.z8n9wev45xct$.dlg@40tude.net>
 <z9Dsg.2740$tE5.2374@news-server.bigpond.net.au>
 <pPHsg.46977$VE1.46332@newssvr14.news.prodigy.com> <kROsg.7$Pg1.2@fe11.lga>
In-Reply-To: <kROsg.7$Pg1.2@fe11.lga>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
Message-ID: <_5idnW0Lk4kxXS7ZnZ2dnUVZ_oOdnZ2d@comcast.com>
NNTP-Posting-Host: 24.18.174.4
X-Trace: 
 sv3-lcsdT8otgZKZRw1M3HwVMuMOdMcwYye2gYOzv/lfSdK7GMBXKr5HfSYfgGil5uKTPtuAPFmd3dJm88p!yc6jCSlJ7krIH5ovmX1Z98n6dZ2cLog7g0g1V1kZYn9asbs2AYuda8meMkx/81w5uqSND7FeQuA5!XANgqA==
X-Complaints-To: abuse@comcast.net
X-DMCA-Complaints-To: dmca@comcast.net
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
 properly
X-Postfilter: 1.3.32
Xref: g2news2.google.com comp.lang.ada:5616 comp.lang.fortran:11940
 comp.lang.pl1:1983
Date: 2006-07-11T08:16:28-07:00
List-Id: <comp.lang.ada>

John W. Kennedy wrote:
(snip regarding compile time detection of references to
uninitialized variables.)

> (Java is the only language I know of that will actually fail the compile 
> unless it /knows/ that every variable is initialized before use in every 
> possible path.)

I am not sure what the language specification says, but Sun compilers
do that.  (Note: for scalars only, not arrays.)

I believe the compilers are getting better.  I used to have
problems with things like:

if(i==3) x=1;
else x=2;

not being recognized as initializing x, but as I understand it
compilers now recognize that case.  I believe there are still
cases where a variable is sure to be initialized but the compiler
doesn't notice it.

Also, tests are done on the class (compiled) file at load time
to protect against many errors.

-- glen