From: "W. Wesley Groleau x4923" <wwgrol@pseserv3.fw.hac.com>
Subject: Re: Building blocks (Was: Design By Contract)
Date: 1997/09/18
Date: 1997-09-18T00:00:00+00:00 [thread overview]
Message-ID: <3421A76F.4709@pseserv3.fw.hac.com> (raw)
In-Reply-To: 34215E3D.77AE@gsfc.nasa.gov
Stephen Leake wrote:
>
> Paul Johnson wrote:
> >
> > Ada allows the programmer to quietly ignore an exception and pretend
> > that a routine succeeded when in fact it failed. This is wrong.
>
> I assume you are talking about:
> begin
> ... some code
> exception
> when others =>
> null;
> end;
>
> which ignores exceptions. Usually, this is a bad idea. But sometimes, it
> is essential. Consider the top level loop of a fail-safe system:
Or, perhaps I know that the guy that wrote routine X sometimes
raises exception Y AFTER X has already done the work I want.
Why shouldn't I ignore exception Y in that case?
> This is a general philosophy of Ada; provide the tools to do various
> jobs. Don't force a programmer to do something because it's "good".
Uh-oh. That sounds like an argument for a fan of C (Also sounds
like the argument against forcing declaration before reference.)
--
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Senior Software Engineer - AFATDS Tool-smith Wanna-be
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next prev parent reply other threads:[~1997-09-18 0:00 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-09-09 0:00 Building blocks (Was: Design By Contract) Marc Wachowitz
1997-09-15 0:00 ` Joachim Durchholz
1997-09-17 0:00 ` Paul Johnson
1997-09-18 0:00 ` Jon S Anthony
1997-09-18 0:00 ` Stephen Leake
1997-09-18 0:00 ` W. Wesley Groleau x4923 [this message]
1997-09-21 0:00 ` Matthew Heaney
1997-09-18 0:00 ` Mark L. Fussell
1997-09-19 0:00 ` Jon S Anthony
1997-09-23 0:00 ` Mark L. Fussell
1997-09-19 0:00 ` Robert A Duff
1997-09-20 0:00 ` Joachim Durchholz
1997-09-22 0:00 ` Matthew Heaney
1997-09-23 0:00 ` Joachim Durchholz
1997-09-23 0:00 ` Veli-Pekka Nousiainen
1997-10-03 0:00 ` Robert I. Eachus
1997-10-04 0:00 ` Paul Johnson
1997-10-14 0:00 ` Robert I. Eachus
1997-09-23 0:00 ` Jon S Anthony
1997-09-24 0:00 ` Richard A. O'Keefe
1997-09-24 0:00 ` Alan E & Carmel J Brain
1997-09-25 0:00 ` Anonymous
1997-09-30 0:00 ` Alan E & Carmel J Brain
1997-09-30 0:00 ` Matthew Heaney
1997-09-30 0:00 ` W. Wesley Groleau x4923
1997-09-30 0:00 ` Matthew Heaney
1997-10-01 0:00 ` Alan E & Carmel J Brain
1997-09-30 0:00 ` Neil Wilson
1997-09-30 0:00 ` Stephen Leake
1997-10-01 0:00 ` Anonymous
1997-10-01 0:00 ` Joachim Durchholz
1997-10-01 0:00 ` Paul M Gover
1997-10-04 0:00 ` Paul Johnson
1997-10-04 0:00 ` Matthew Heaney
1997-10-15 0:00 ` Paul Johnson
1997-10-15 0:00 ` Matthew Heaney
1997-10-16 0:00 ` Joachim Durchholz
1997-10-17 0:00 ` Robert I. Eachus
1997-10-16 0:00 ` Joachim Durchholz
1997-10-22 0:00 ` Reimer Behrends
1997-10-02 0:00 ` Robert A Duff
1997-10-02 0:00 ` Tucker Taft
1997-10-02 0:00 ` Matthew Heaney
1997-10-03 0:00 ` Stephen Leake
1997-10-04 0:00 ` Matthew Heaney
1997-10-07 0:00 ` Robert A Duff
[not found] ` <11861963wnr@eiffel.demon.co.uk>
1997-09-19 0:00 ` Mark L. Fussell
1997-09-18 0:00 ` Robert Dewar
-- strict thread matches above, loose matches on Subject: below --
1997-09-11 0:00 Robert Dewar
1997-09-09 0:00 Marc Wachowitz
1997-09-02 0:00 Design By Contract Jon S Anthony
[not found] ` <JSA.97Sep3201329@alexandria.organon.com>
1997-09-04 0:00 ` Paul Johnson
[not found] ` <5un58u$9ih$1@gonzo.sun3.iaf.nl>
1997-09-06 0:00 ` Building blocks (Was: Design By Contract) Joachim Durchholz
1997-09-08 0:00 ` Paul Johnson
1997-09-08 0:00 ` Brian Rogoff
1997-09-09 0:00 ` Veli-Pekka Nousiainen
1997-09-09 0:00 ` Veli-Pekka Nousiainen
1997-09-09 0:00 ` Jon S Anthony
1997-09-09 0:00 ` W. Wesley Groleau x4923
1997-09-09 0:00 ` Matthew Heaney
1997-09-09 0:00 ` W. Wesley Groleau x4923
1997-09-10 0:00 ` Robert A Duff
1997-09-12 0:00 ` Jon S Anthony
1997-09-09 0:00 ` Brian Rogoff
1997-09-10 0:00 ` Robert Dewar
1997-09-12 0:00 ` Jon S Anthony
1997-09-12 0:00 ` Robert Dewar
1997-09-16 0:00 ` Brian Rogoff
1997-09-12 0:00 ` Paul Johnson
1997-09-14 0:00 ` Robert Dewar
1997-09-14 0:00 ` Robert Dewar
1997-09-15 0:00 ` John G. Volan
1997-09-14 0:00 ` Robert Dewar
1997-09-10 0:00 ` Paul Johnson
1997-09-10 0:00 ` Darren New
1997-09-10 0:00 ` Matthew Heaney
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