From: Mark A Biggar <mark.a.biggar@lmco.com>
Subject: Re: Ada OO Mechanism
Date: 1999/05/25
Date: 1999-05-25T00:00:00+00:00 [thread overview]
Message-ID: <374AC676.F7AE0772@lmco.com> (raw)
In-Reply-To: umq4sl1h66q.fsf@maestro.clustra.com
Ole-Hjalmar Kristensen wrote:
>
> David Starner <dstarner98@aasaa.ofe.org> writes:
>
> > bob wrote:
> > >
> > > In article <3749E9EC.2842436A@aasaa.ofe.org>, David says...
> > > >
> > >
> > > >Think of vectors and the dot product. C++ forces you to view one vector
> > > >as significant (a becomes "this" inside dot function, it's called
> > > >a.dot(b)), even though in a dot b, a and b are equal significance - dot
> > > >product is a symmetric function. Ada makes them of equal importnatce in
> > > >the dot function body and call.
> > >
> > > Are sure you are not talking about Java (which does not have user defined
> > > operators) ?
> > Yes. I was discussing a.dot(b) vs. dot(a,b), not user defined operators.
> > >
>
> What makes you think you cannot implement dot(a,b) in C++?
You can, but there are some problems with doing that.
1) It's not really part of the class as it has to be defined as
an external "friend" function.
2) It therefore CANNOT be made virtual so you can't dispatch on it.
3) This also greatly complicates its use in generic (template) algorithms.
None of those problems exist in Ada.
--
Mark Biggar
mark.a.biggar@lmco.com
next prev parent reply other threads:[~1999-05-25 0:00 UTC|newest]
Thread overview: 116+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-20 0:00 Ada OO Mechanism Shawn M. Root
1999-05-20 0:00 ` Samuel Mize
1999-05-20 0:00 ` David Botton
1999-05-20 0:00 ` Samuel Mize
1999-05-20 0:00 ` David Botton
1999-05-24 0:00 ` Hyman Rosen
1999-05-24 0:00 ` Robert Dewar
1999-05-24 0:00 ` Hyman Rosen
1999-05-24 0:00 ` Mike
1999-05-25 0:00 ` Robert Dewar
1999-05-24 0:00 ` David Starner
1999-05-24 0:00 ` bob
1999-05-24 0:00 ` David Starner
1999-05-25 0:00 ` Ole-Hjalmar Kristensen
1999-05-25 0:00 ` Mark A Biggar [this message]
1999-05-25 0:00 ` Hyman Rosen
1999-05-25 0:00 ` Samuel Mize
1999-05-25 0:00 ` Hyman Rosen
1999-05-25 0:00 ` Brian Rogoff
1999-05-25 0:00 ` Jim
1999-05-26 0:00 ` Robert Dewar
1999-05-26 0:00 ` Brian Rogoff
1999-05-25 0:00 ` Samuel Mize
1999-05-25 0:00 ` Chris
1999-05-25 0:00 ` David Botton
1999-05-27 0:00 ` Aidan Skinner
1999-05-27 0:00 ` Gautier
1999-05-27 0:00 ` Samuel Mize
1999-05-25 0:00 ` Richard D Riehle
1999-05-25 0:00 ` Hyman Rosen
1999-05-26 0:00 ` Ray Blaak
1999-05-26 0:00 ` Hyman Rosen
1999-05-26 0:00 ` Richard D Riehle
1999-05-26 0:00 ` Hyman Rosen
1999-05-27 0:00 ` Richard D Riehle
1999-06-05 0:00 ` Matthew Heaney
1999-06-07 0:00 ` Hyman Rosen
1999-05-28 0:00 ` Laurent Guerby
1999-06-05 0:00 ` Matthew Heaney
1999-06-07 0:00 ` Hyman Rosen
1999-06-08 0:00 ` Robert Dewar
1999-06-08 0:00 ` Stanley R. Allen
1999-06-08 0:00 ` Markus Kuhn
1999-06-08 0:00 ` Stanley R. Allen
1999-06-08 0:00 ` Matthew Heaney
1999-06-08 0:00 ` Hyman Rosen
1999-06-08 0:00 ` Samuel Mize
1999-06-08 0:00 ` Hyman Rosen
[not found] ` <t7zp2sr6yf.fsf@calumny.jyacc.c <t7r9nmz8ou.fsf@calumny.jyacc.com>
1999-06-08 0:00 ` Larry Kilgallen
1999-06-08 0:00 ` Hyman Rosen
1999-06-14 0:00 ` Robert A Duff
[not found] ` <t7zp2sr6yf.fsf@calumny.jyacc.c <t7emjmmx8w.fsf@calumny.jyacc.com>
1999-06-08 0:00 ` Larry Kilgallen
1999-06-08 0:00 ` Hyman Rosen
1999-06-08 0:00 ` Tucker Taft
1999-06-08 0:00 ` Brian Rogoff
1999-06-09 0:00 ` Tucker Taft
1999-06-09 0:00 ` Robert Dewar
[not found] ` < <375E92CB.27850620@averstar.com>
1999-06-09 0:00 ` Brian Rogoff
1999-06-14 0:00 ` Robert A Duff
1999-06-09 0:00 ` Samuel Mize
1999-06-09 0:00 ` Matthew Heaney
[not found] ` <t7zp2sr6yf.fsf@calumny.jyacc.c <375d9a3d.e1cccc63@averstar.com>
1999-06-09 0:00 ` Larry Kilgallen
1999-06-09 0:00 ` Tucker Taft
1999-05-27 0:00 ` Samuel Mize
1999-05-27 0:00 ` Jon S Anthony
1999-05-27 0:00 ` Samuel Mize
1999-05-27 0:00 ` Hyman Rosen
1999-05-28 0:00 ` Samuel Mize
1999-05-28 0:00 ` Laurent Guerby
1999-05-28 0:00 ` Richard D Riehle
1999-05-28 0:00 ` Tom Moran
1999-05-25 0:00 ` Richard D Riehle
1999-05-25 0:00 ` David Botton
1999-05-26 0:00 ` Tom Moran
1999-05-27 0:00 ` Aidan Skinner
1999-05-28 0:00 ` Robert I. Eachus
1999-05-28 0:00 ` Brian Rogoff
1999-05-29 0:00 ` Ehud Lamm
1999-05-30 0:00 ` chris
1999-05-30 0:00 ` Harry George
1999-05-30 0:00 ` Vladimir Olensky
1999-05-31 0:00 ` Robert Dewar
1999-05-30 0:00 ` Robert Dewar
1999-05-31 0:00 ` Vladimir Olensky
1999-06-03 0:00 ` Dale Stanbrough
1999-06-02 0:00 ` mike
1999-06-03 0:00 ` Robert Dewar
1999-06-06 0:00 ` David Botton
1999-06-07 0:00 ` Robert Dewar
1999-06-01 0:00 ` Richard D Riehle
1999-06-03 0:00 ` Matthew Heaney
1999-06-03 0:00 ` Matthew Heaney
1999-05-25 0:00 ` Florian Weimer
1999-05-25 0:00 ` Samuel Mize
1999-05-25 0:00 ` Hyman Rosen
1999-05-25 0:00 ` David Starner
1999-05-26 0:00 ` Laurent Guerby
1999-05-26 0:00 ` Hyman Rosen
1999-05-28 0:00 ` Laurent Guerby
1999-06-01 0:00 ` Hyman Rosen
1999-06-03 0:00 ` Fraser Wilson
1999-05-26 0:00 ` Ole-Hjalmar Kristensen
1999-06-03 0:00 ` Matthew Heaney
1999-06-03 0:00 ` Hyman Rosen
1999-05-21 0:00 ` Dale Stanbrough
1999-05-20 0:00 ` bob
1999-05-21 0:00 ` Dale Stanbrough
1999-05-21 0:00 ` Richard D Riehle
1999-05-21 0:00 ` Shawn M. Root
1999-05-21 0:00 ` Richard D Riehle
1999-05-25 0:00 ` Shawn M. Root
1999-05-21 0:00 ` Marin David Condic
1999-05-21 0:00 ` Dan Nagle
1999-05-24 0:00 ` Marin David Condic
1999-05-21 0:00 ` Steve
1999-05-25 0:00 ` Don Overheu
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