From: dewarr@my-dejanews.com
Subject: Re: Fortran or Ada?
Date: 1998/09/25
Date: 1998-09-25T00:00:00+00:00 [thread overview]
Message-ID: <6uh8ph$1el$1@nnrp1.dejanews.com> (raw)
In-Reply-To: EACHUS.98Sep25154925@spectre.mitre.org
In article <EACHUS.98Sep25154925@spectre.mitre.org>,
eachus@spectre.mitre.org (Robert I. Eachus) wrote:
> In article <6uenmo$fov$1@nnrp1.dejanews.com> dewarr@my-dejanews.com writes:
>
> > My best understanding is that the DO I = 1.6 type bug was
> > actually in the code at one time, but discovered during
> > simulation.
>
> > Incidentally there is a remarkable APAR for IBSYS Fortran
> > IV dated around 1967 which read something like
>
> > "The Fortran compiler miscompiles [the above type of DO]
> > and treats it as an assignment statement. This will be
> > corrected in a future release."
>
> > TO my knowledge this APAR was never closed :-)
>
> I thought it was. Several compilers I used in that time frame would
> produce warning messages if a reserved word was combined into an
> identifier, or if any spaces occured in suspicious places.
> (Unfortunately, I know this because I had to check all warnings on
> some code which had been written with variable names containing
> spaces. Fortunately, six, and later eight, character names didn't
> have much room for mischief like this, but I do remember variables
> named NO GO and LAST X.)
Robert, I am not sure you know the terminology I am using here. IBM could
hardly close that APAR, since the defect it refers to is not a defect.
That's the point, there is no way that a compiler could be stopped from
"misclassifying" this statement.
The IBM compilers for the 7000 series (both under FMS and IBSYS) did not
have warnings of the type you recall, and in any case a warning is not
enough to "close" this APAR!
By the way, Fortran II had a genuine language ambiguity
READ TAPE2, X, Y, Z
to read from variable format variable TAPE2
READ TAPE 2, X, Y, Z
to read from tape unit number 2.
Remember that blanks were insignificant in Fortran II. An undocumented
feature was that the Fortran II compiler always chose the second possibility!
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next prev parent reply other threads:[~1998-09-25 0:00 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <36068E73.F0398C54@meca.polymtl.ca>
1998-09-22 0:00 ` Fortran or Ada? Gisle S{lensminde
1998-09-22 0:00 ` Jeff Templon
1998-09-22 0:00 ` Rakesh Malhotra
1998-09-22 0:00 ` dewarr
1998-09-23 0:00 ` Jeff Templon
1998-09-23 0:00 ` Corey Minyard
1998-09-24 0:00 ` Joel Seidman
1998-09-24 0:00 ` Craig Burley
1998-09-25 0:00 ` dewarr
1998-09-25 0:00 ` Jonathan Guthrie
1998-09-26 0:00 ` Craig Burley
1998-09-26 0:00 ` dewarr
1998-09-26 0:00 ` Craig Burley
1998-09-26 0:00 ` Robert B. Love
1998-09-24 0:00 ` Marc A. Criley
1998-09-24 0:00 ` dewarr
1998-09-24 0:00 ` Robert I. Eachus
1998-09-24 0:00 ` William Clodius
1998-09-25 0:00 ` dewarr
1998-09-25 0:00 ` dewarr
1998-09-25 0:00 ` Robert I. Eachus
1998-09-25 0:00 ` dewarr [this message]
1998-09-25 0:00 ` jbs
1998-09-26 0:00 ` dewarr
1998-09-28 0:00 ` jbs
1998-09-29 0:00 ` Gautier.DeMontmollin
1998-09-29 0:00 ` Dean F. Sutherland
1998-09-29 0:00 ` Dean F. Sutherland
1998-09-29 0:00 ` Dean F. Sutherland
1998-09-29 0:00 ` William B. Clodius
1998-09-30 0:00 ` jbs
1998-09-30 0:00 ` William Clodius
1998-09-30 0:00 ` dewarr
1998-09-30 0:00 ` jbs
1998-09-30 0:00 ` William Clodius
1998-10-03 0:00 ` Niklas Holsti
1998-10-03 0:00 ` Toon Moene
1998-10-03 0:00 ` Niklas Holsti
1998-10-03 0:00 ` Toon Moene
1998-10-04 0:00 ` Niklas Holsti
1998-10-05 0:00 ` Michel OLAGNON
1998-10-05 0:00 ` Ian St. John
1998-10-05 0:00 ` Richard D Riehle
1998-10-05 0:00 ` dewarr
1998-10-05 0:00 ` dewarr
1998-10-05 0:00 ` Ian St. John
1998-10-06 0:00 ` dewarr
1998-10-06 0:00 ` James Giles
1998-10-06 0:00 ` Mark A Biggar
1998-10-06 0:00 ` James Giles
1998-10-07 0:00 ` dewarr
1998-10-07 0:00 ` dewarr
1998-10-06 0:00 ` Toon Moene
1998-10-06 0:00 ` Jonathan Guthrie
1998-10-06 0:00 ` Ian St. John
1998-10-08 0:00 ` Gary L. Scott
1998-10-08 0:00 ` Offtopic Airport Diversion (Was: Fortran or Ada?) Harold Stevens ** PLEASE SEE SIG **
1998-10-08 0:00 ` Ian St. John
1998-10-06 0:00 ` Fortran or Ada? Michel OLAGNON
1998-10-07 0:00 ` Ian St. John
1998-10-02 0:00 ` Robert I. Eachus
1998-10-02 0:00 ` jbs
1998-10-02 0:00 ` William Clodius
1998-10-03 0:00 ` jbs
1998-10-03 0:00 ` Larry Elmore
1998-10-06 0:00 ` Robert I. Eachus
1998-10-06 0:00 ` Pat Rogers
1998-10-02 0:00 ` Geoff Bull
1998-09-24 0:00 ` Jeff Templon
1998-09-25 0:00 ` Dale Stanbrough
1998-09-30 0:00 ` Daniel Barker
1998-09-30 0:00 ` Lawrence Kirby
1998-10-01 0:00 ` Aaron Crane
1998-10-02 0:00 ` Fortran or Ada or gobbledygook? Wes Groleau
1998-10-05 0:00 ` Fortran or Ada? Terry Devine
1998-09-25 0:00 ` dewarr
[not found] ` <6udre0$ha1$1@nnrp1.dejane <6utg60$h6l$1@nnrp1.dejanews.com>
1998-10-01 0:00 ` robin_v
1998-09-22 0:00 ` Larry Kilgallen
1998-09-22 0:00 ` Corey Minyard
1998-09-23 0:00 ` Frank Ecke
1998-09-23 0:00 ` bglbv
1998-09-23 0:00 ` Robert I. Eachus
1998-09-24 0:00 ` Richard D Riehle
1998-09-23 0:00 Marin David Condic, 561.796.8997, M/S 731-96
-- strict thread matches above, loose matches on Subject: below --
1998-09-23 0:00 Marin David Condic, 561.796.8997, M/S 731-96
1998-09-23 0:00 ` Gisle S{lensminde
1998-09-24 0:00 ` John McCabe
1998-09-24 0:00 ` Gisle S{lensminde
1998-09-24 0:00 ` Dean F. Sutherland
1998-09-24 0:00 ` Samuel T. Harris
1998-09-24 0:00 Walt Brainerd
1998-09-25 0:00 ` Robert I. Eachus
1998-09-25 0:00 ` dewarr
1998-10-05 0:00 Robert I. Eachus
1998-10-05 0:00 Condic, Marin D.
1998-10-05 0:00 robin
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