From: eachus@spectre.mitre.org (Robert I. Eachus)
Subject: Re: Elaboration order
Date: 1996/03/22
Date: 1996-03-22T00:00:00+00:00 [thread overview]
Message-ID: <EACHUS.96Mar21191632@spectre.mitre.org> (raw)
In-Reply-To: Do8JDv.A2v@world.std.com
In article <emery-1903962048300001@line130.nwm.mindlink.net> emery@grebyn.com (David Emery) writes:
> Of course, there wasn't time to type in the program so Eachus scribbled
> it down on the side of an old printout, which he has subsequently
> lost :-) :-)
I did NOT, I actually threw it at a couple of Ada 80 compilers to
see what happened, but the compiles never finished. :-( When Ada 83
compilers came along, they produced code which just sat there burning
cycles, and never got to the main program. (If there was a non-trivial
solution to A**N + B**N = C**N for N > 2, the program would eventually
raise Program_Error. Since it was using an arbitrary precision
arithmetic package, it would probably have raised Storage_Error
eventually, but I never ran it that long.)
However, the Ada 80 program that really got me in trouble was the
one that showed a flaw in one implementor's approach to elaboration of
accept entries. With a pair of nested accepts for the same entry with
an unconstrained array parameter, I showed just what a bad an idea
that implemetation was. Ada 83 and Ada 95 both have a prohibition of
nested accept statements for the same entry as a result.
As a result I made a vow NEVER to put code on a blackboard or
overhead if I don't want people actually compiling it.
--
Robert I. Eachus
with Standard_Disclaimer;
use Standard_Disclaimer;
function Message (Text: in Clever_Ideas) return Better_Ideas is...
next prev parent reply other threads:[~1996-03-22 0:00 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <314701A1.469D@lfwc.lockheed.com>
1996-03-15 0:00 ` Elaboration order Robert I. Eachus
1996-03-15 0:00 ` Robert Dewar
[not found] ` <1996Mar14.021345.9856@enterprise.rdd.lmsc.lockheed.com>
[not found] ` <314829CD.4FA9@lfwc.lockheed.com>
1996-03-15 0:00 ` Tucker Taft
1996-03-15 0:00 ` Ken Garlington
1996-03-16 0:00 ` Joe Wierzbowski
1996-03-26 0:00 ` AdaWorks
1996-03-26 0:00 ` Robert Dewar
1996-03-26 0:00 ` Robert A Duff
1996-03-26 0:00 ` Robert Dewar
1996-03-26 0:00 ` IO in Pure packages, debugging Laurent Guerby
1996-03-26 0:00 ` Elaboration order Robert A Duff
1996-03-16 0:00 ` Ted Dennison
1996-03-26 0:00 ` Laurent Guerby
1996-03-26 0:00 ` Robert A Duff
1996-03-18 0:00 ` Ken Garlington
1996-03-18 0:00 ` Ted Dennison
1996-03-19 0:00 ` Michel Gauthier
1996-03-20 0:00 ` DenReimer
1996-03-20 0:00 ` Tucker Taft
1996-03-20 0:00 ` Robert A Duff
1996-03-20 0:00 ` Norman H. Cohen
1996-03-20 0:00 ` Robert Dewar
1996-03-20 0:00 ` Norman H. Cohen
[not found] ` <Do8JDv.A2v@world.std.com>
[not found] ` <31494143.3825@lfwc.lockheed.com>
1996-03-15 0:00 ` Mark A Biggar
1996-03-18 0:00 ` Ken Garlington
1996-03-19 0:00 ` Norman H. Cohen
1996-03-20 0:00 ` Cordes MJ
1996-03-19 0:00 ` Robert Dewar
1996-03-21 0:00 ` Ken Garlington
1996-03-21 0:00 ` Cordes MJ
1996-03-20 0:00 ` Robert A Duff
1996-03-20 0:00 ` Cordes MJ
1996-03-20 0:00 ` Robert A Duff
1996-03-22 0:00 ` Cordes MJ
1996-03-20 0:00 ` Robert Dewar
1996-03-21 0:00 ` Ken Garlington
1996-03-23 0:00 ` JP Thornley
1996-03-25 0:00 ` Robert Dewar
1996-03-26 0:00 ` JP Thornley
1996-03-19 0:00 ` Chris McKnight
1996-03-21 0:00 ` Ken Garlington
1996-03-15 0:00 ` Robert A Duff
1996-03-18 0:00 ` Norman H. Cohen
[not found] ` <EACHUS.96Mar18143219@spectre.mitre.org>
1996-03-18 0:00 ` Robert Dewar
1996-03-18 0:00 ` Robert Dewar
1996-03-19 0:00 ` Ted Dennison
1996-03-20 0:00 ` David Emery
1996-03-20 0:00 ` Robert I. Eachus
1996-03-22 0:00 ` Robert I. Eachus [this message]
1996-03-22 0:00 ` Robert I. Eachus
1999-11-15 0:00 Elaboration Order Wolf-Dieter Heker
1999-11-15 0:00 ` Robert Dewar
1999-11-16 0:00 ` Wolf-Dieter Heker
1999-11-16 0:00 ` Robert Dewar
1999-11-20 0:00 ` Simon Wright
1999-11-22 0:00 ` Robert Dewar
1999-11-23 0:00 ` Mats Weber
1999-11-16 0:00 ` Robert Dewar
1999-11-16 0:00 ` David C. Hoos, Sr.
1999-11-15 0:00 ` Jean-Pierre Rosen
1999-11-15 0:00 ` Robert Dewar
1999-11-16 0:00 ` Jean-Pierre Rosen
1999-11-20 0:00 ` Simon Wright
-- strict thread matches above, loose matches on Subject: below --
1996-03-18 0:00 Elaboration order Jean-Pierre Rosen
1996-03-21 0:00 ` Ken Garlington
[not found] <DoDMLL.1F9@world.std.com>
1996-03-18 0:00 ` Chris McKnight
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