From: Marin David Condic <condicma@bogon.pwfl.com>
Subject: Re: Ada and Java. different behaviour. casting long to int problem.
Date: 1999/06/15
Date: 1999-06-15T00:00:00+00:00 [thread overview]
Message-ID: <3766650F.705125B7@pwfl.com> (raw)
In-Reply-To: 7k57vb$1ipf@drn.newsguy.com
mike@world.nospam.com wrote:
>
> 'The result of an overflow isn't necessarily the wrong number' the bank
> attorney replies. (flaged on the side by the bank top Java consultant ready
> to supply more therotical evidence that supports such a statment).
>
I'm of the opinion that if one wishes behavior different from that of
"normal" arithmetic, then this should be specified by a type with
special properties. One acustomed to normal arithmetic is going to
believe that X := X + 1 will yield the successor of X in the set of all
integer numbers. If that isn't possible because of real world
limitations, then we have encountered an exceptional condition which
ought to raise some sort of flag and warn the world that the anticipated
behavior was not achieved. If one wants wraparound semantics, then
perhaps there should be a special type to support that behavior - a la
modular types in Ada. (Although these don't contain negative numbers and
that may be a requirement.) In some cases, saturation semantics are a
good thing, but again, this is not the "normal" understanding of
arithmetic and therefore should be supported by a special type.
MDC
--
Marin David Condic
Real Time & Embedded Systems, Propulsion Systems Analysis
United Technologies, Pratt & Whitney, Large Military Engines
M/S 731-95, P.O.B. 109600, West Palm Beach, FL, 33410-9600
***To reply, remove "bogon" from the domain name.***
Visit my web page at: http://www.mcondic.com/
next prev parent reply other threads:[~1999-06-15 0:00 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-06-12 0:00 Ada and Java. different behaviour. casting long to int problem nabbasi
1999-06-12 0:00 ` Tucker Taft
1999-06-12 0:00 ` Keith Thompson
1999-06-12 0:00 ` kirck
1999-06-13 0:00 ` Robert Dewar
1999-06-12 0:00 ` Fred
1999-06-14 0:00 ` Mark Hood
1999-06-15 0:00 ` mike
1999-06-15 0:00 ` Samuel Mize
1999-06-15 0:00 ` jerry
1999-06-16 0:00 ` Richard D Riehle
1999-06-16 0:00 ` jerry
1999-06-15 0:00 ` D'Arcy Smith
1999-06-16 0:00 ` George W. Bayles
1999-06-16 0:00 ` D'Arcy Smith
1999-06-17 0:00 ` Aidan Skinner
1999-06-17 0:00 ` Matthew Heaney
1999-06-15 0:00 ` Marin David Condic [this message]
1999-06-15 0:00 ` Mike Silva
1999-06-15 0:00 ` rich
1999-06-15 0:00 ` Samuel Mize
1999-06-15 0:00 ` Marin David Condic
1999-06-15 0:00 ` D'Arcy Smith
1999-06-15 0:00 ` Keith Thompson
1999-06-16 0:00 ` bill
1999-06-16 0:00 ` George W. Bayles
1999-06-16 0:00 ` Fraser Wilson
1999-06-17 0:00 ` Chris Dollin
1999-06-17 0:00 ` Aidan Skinner
1999-06-17 0:00 ` David Botton
1999-06-18 0:00 ` Dale Stanbrough
1999-06-18 0:00 ` David Botton
1999-06-18 0:00 ` Pascal Obry
1999-06-18 0:00 ` Matthew Heaney
1999-07-20 0:00 ` Geoff Bull
1999-06-16 0:00 ` D'Arcy Smith
1999-06-16 0:00 ` Mike Silva
1999-06-16 0:00 ` D'Arcy Smith
1999-06-16 0:00 ` kirk
1999-06-16 0:00 ` D'Arcy Smith
1999-06-17 0:00 ` Markus Kuhn
1999-06-17 0:00 ` D'Arcy Smith
1999-06-17 0:00 ` john
1999-06-17 0:00 ` Ed Falis
1999-06-18 0:00 ` Aidan Skinner
1999-06-16 0:00 ` Hyman Rosen
1999-06-17 0:00 ` Jean-Pierre Rosen
1999-06-17 0:00 ` Marin David Condic
1999-06-17 0:00 ` Samuel Mize
1999-06-17 0:00 ` Marin David Condic
1999-06-22 0:00 ` Hyman Rosen
1999-06-22 0:00 ` Keith Thompson
1999-06-23 0:00 ` Marin David Condic
1999-06-24 0:00 ` Robert A Duff
1999-06-24 0:00 ` Marin David Condic
1999-06-23 0:00 ` Marin David Condic
1999-06-18 0:00 ` Aidan Skinner
1999-06-17 0:00 ` Markus Kuhn
1999-06-17 0:00 ` Robert I. Eachus
1999-06-17 0:00 ` Hyman Rosen
1999-06-17 0:00 ` Marin David Condic
1999-06-17 0:00 ` bob
1999-06-18 0:00 ` Hyman Rosen
1999-06-18 0:00 ` mike
1999-06-18 0:00 ` Hyman Rosen
1999-06-19 0:00 ` Dale Stanbrough
1999-06-21 0:00 ` Marin David Condic
1999-06-19 0:00 ` Samuel Mize
1999-06-21 0:00 ` Marin David Condic
1999-06-21 0:00 ` Mike Silva
1999-06-20 0:00 ` Sera Hirasuna
1999-06-19 0:00 ` Kio
1999-06-20 0:00 ` Vladimir Olensky
1999-06-21 0:00 ` Samuel T. Harris
1999-06-22 0:00 ` Robert I. Eachus
1999-06-23 0:00 ` Richard D Riehle
1999-06-23 0:00 ` Aidan Skinner
1999-06-22 0:00 ` Richard D Riehle
1999-06-21 0:00 ` Hyman Rosen
1999-06-17 0:00 ` Jean-Pierre Rosen
1999-06-16 0:00 ` Marin David Condic
1999-06-16 0:00 ` George W. Bayles
1999-06-16 0:00 ` D'Arcy Smith
1999-06-16 0:00 ` D'Arcy Smith
1999-06-16 0:00 ` Tucker Taft
1999-06-17 0:00 ` George W. Bayles
1999-06-17 0:00 ` Tucker Taft
1999-06-17 0:00 ` bob
1999-06-17 0:00 ` Larry Kilgallen
1999-06-22 0:00 ` Robert Dewar
1999-06-23 0:00 ` Marin David Condic
1999-06-23 0:00 ` Vladimir Olensky
1999-06-23 0:00 ` Roedy Green
1999-06-23 0:00 ` Marin David Condic
1999-06-23 0:00 ` Keith Thompson
1999-06-24 0:00 ` Mike Silva
1999-06-24 0:00 ` Marin David Condic
1999-06-23 0:00 ` Marin David Condic
1999-06-15 0:00 ` tmoran
1999-06-15 0:00 ` David Botton
1999-06-16 0:00 ` Samuel Mize
1999-06-16 0:00 ` Richard D Riehle
1999-06-16 0:00 ` Mark Hood
1999-06-17 0:00 ` Jean-Pierre Rosen
1999-06-17 0:00 ` Robert I. Eachus
1999-06-17 0:00 ` Marin David Condic
1999-06-17 0:00 ` Markus Kuhn
1999-06-17 0:00 ` David Botton
1999-06-12 0:00 ` PPAATT
1999-06-13 0:00 ` Robert Dewar
1999-06-14 0:00 ` tmoran
1999-06-30 0:00 ` John Merryweather Cooper
1999-07-01 0:00 ` Chad R. Meiners
1999-07-02 0:00 ` Robert Dewar
1999-07-02 0:00 ` John Merryweather Cooper
1999-07-03 0:00 ` Robert Dewar
1999-06-12 0:00 ` nabbasi
1999-06-12 0:00 ` jerry
1999-06-12 0:00 ` Robert Dewar
1999-06-14 0:00 ` Marin David Condic
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