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From: bobduff@world.std.com (Robert A Duff)
Subject: Re: Call by reference vs. call by value
Date: 1996/07/21
Date: 1996-07-21T00:00:00+00:00	[thread overview]
Message-ID: <DuwxvJ.G4t@world.std.com> (raw)
In-Reply-To: dewar.837901109@schonberg


In article <dewar.837901109@schonberg>, Robert Dewar <dewar@cs.nyu.edu> wrote:
>P.S. we also got quite a few complaints of regressions that turned out to  be
>people assuming that records were passed by reference, and their programs
>depended on reference semantics!

But this is proof that the implementation-definedness is indeed a
bug-causing problem.  I'm convinced there must be a better solution that
does not introduce huge amounts of copying.

- Bob

P.S. In thinking about this issue, one point is that for remote
procedure calls, you pretty much *have* to pass by copy, even for very
large things.  So a rule saying "all arrays are passed by reference" or
"all arrays that are not statically known to be small are passed by
reference (for some definition of small)" would break the Distributed
Systems Annex.




  reply	other threads:[~1996-07-21  0:00 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1996-07-20  0:00 Call by reference vs. call by value Christopher Felaco
1996-07-20  0:00 ` James A. Krzyzanowski
1996-07-20  0:00   ` Robert Dewar
1996-07-20  0:00 ` Robert Dewar
1996-07-21  0:00   ` Robert A Duff [this message]
1996-07-21  0:00     ` Robert Dewar
1996-07-22  0:00       ` Robert A Duff
1996-07-23  0:00         ` Peter Amey
1996-07-23  0:00           ` Robert Dewar
1996-07-24  0:00             ` Robert A Duff
1996-07-23  0:00           ` Robert A Duff
1996-07-27  0:00             ` Peter Morris
1996-07-28  0:00               ` Robert A Duff
1996-07-24  0:00           ` Richard A. O'Keefe
1996-07-22  0:00   ` Felaco
1996-07-22  0:00     ` Robert Dewar
1996-07-22  0:00     ` Robert A Duff
1996-07-30  0:00       ` Richard A. O'Keefe
1996-07-22  0:00   ` Karl Cooper {46901}
1996-07-22  0:00     ` Robert Dewar
1996-07-30  0:00   ` Felaco
1996-07-31  0:00     ` Robert A Duff
1996-08-02  0:00     ` Robert Dewar
1996-08-03  0:00     ` JP Thornley
1996-08-05  0:00       ` Roderick Chapman
1996-07-21  0:00 ` Robert A Duff
1996-07-21  0:00   ` Robert Dewar
  -- strict thread matches above, loose matches on Subject: below --
1996-07-25  0:00 Marin David Condic, 407.796.8997, M/S 731-93
1996-07-26  0:00 ` Peter Amey
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