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From: donh@syd.csa.com.au (Don Harrison)
Subject: Re: Eiffel and Java + Ada dispatching
Date: 1996/11/05
Date: 1996-11-05T00:00:00+00:00	[thread overview]
Message-ID: <E0DEqF.C2D@syd.csa.com.au> (raw)
In-Reply-To: dewar.846951203@merv


Robert Dewar writes:

:Don Harrison says
:
:"Disagree. Overloading *is* syntactic sugar because it merely allows reuse
:of an identifier without any semantic difference (to using a different one).
:The reason Ada does not need checks on use of polymorphism is that
:it is avariant (no variance) compared with Eiffel which is covariant."
:
:... In particular, overloading plays quite
:an important role with respect to generic instantiation, and is much
:more than syntactic sugar in Ada.

You appear to be referring to RM 12.3(14) under Generic Instantiation, Static
Semantics which says

  "The interpretation of each construct within a generic declaration or body
   is determined using the overloading rules ...".

Maybe I don't understand what this means but it's not clear how this is any 
different from other uses of overloading (in which there is no semantic 
difference from using unique procedure names). If you can provide an example 
showing there is such a difference, I'll believe you.


Don.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Don Harrison             donh@syd.csa.com.au






  parent reply	other threads:[~1996-11-05  0:00 UTC|newest]

Thread overview: 162+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1996-10-27  0:00 Eiffel and Java Vincent WEBER
1996-10-27  0:00 ` Jean-Michel P. Decombe
1996-10-28  0:00   ` Robert Dewar
1996-10-31  0:00     ` Doug Marker
1996-10-28  0:00   ` David Hanley
1996-10-28  0:00     ` Matt Kennel
1996-10-28  0:00   ` Alexandre Oliva
1996-10-29  0:00   ` Chris Trimble
1996-10-31  0:00     ` Doug Marker
1996-10-31  0:00   ` David Bennett
1996-10-28  0:00 ` Larry Kilgallen
1996-10-30  0:00   ` Ronald Cole
1996-10-28  0:00 ` Matthew Heaney
1996-10-29  0:00   ` Vincent WEBER
1996-10-31  0:00     ` James McKim
1996-11-01  0:00       ` Matthew Heaney
1996-11-04  0:00         ` James McKim
1996-10-30  0:00   ` Jon S Anthony
1996-11-01  0:00     ` Eiffel and Java + Ada dispatching Jean-Marc Jezequel
1996-10-30  0:00   ` Eiffel and Java Don Harrison
1996-10-31  0:00     ` James McKim
1996-11-04  0:00       ` Don Harrison
1996-11-23  0:00       ` Van Snyder
1996-10-31  0:00   ` Joachim Durchholz
1996-11-01  0:00   ` Norman H. Cohen
1996-11-02  0:00   ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-02  0:00   ` Eiffel and Java Jon S Anthony
1996-11-03  0:00   ` Joachim Durchholz
1996-11-05  0:00   ` Norman H. Cohen
1996-10-29  0:00 ` Don Harrison
1996-10-29  0:00   ` Fergus Henderson
1996-10-30  0:00     ` Don Harrison
1996-10-30  0:00       ` Fergus Henderson
1996-10-31  0:00     ` David L. Shang
1996-11-01  0:00       ` Matt Kennel
1996-11-04  0:00         ` David L. Shang
1996-11-05  0:00           ` Matt Kennel
1996-11-06  0:00             ` David L. Shang
1996-11-04  0:00       ` Robert I. Eachus
1996-11-01  0:00     ` Jon S Anthony
1996-11-02  0:00       ` Fergus Henderson
1996-11-04  0:00       ` David L. Shang
1996-11-05  0:00         ` Jon S Anthony
1996-11-02  0:00     ` Darko BUDOR
1996-11-02  0:00       ` Fergus Henderson
1996-11-03  0:00         ` Darko BUDOR
1996-11-03  0:00         ` Matt Kennel
1996-11-03  0:00     ` Jon S Anthony
1996-11-03  0:00     ` Matthias Ernst
1996-11-05  0:00     ` Jon S Anthony
1996-11-10  0:00     ` Marcos F. F. de Macedo
1996-11-11  0:00       ` David L. Shang
1996-11-12  0:00         ` Fergus Henderson
1996-11-12  0:00           ` David L. Shang
1996-11-12  0:00             ` David L. Shang
1996-11-16  0:00             ` Fergus Henderson
1996-11-18  0:00               ` David L. Shang
1996-11-18  0:00             ` Kai Quale
1996-11-18  0:00               ` David L. Shang
1996-11-25  0:00                 ` Kai Quale
1996-11-15  0:00         ` Paul Johnson
1996-11-12  0:00       ` Alexander Asteroth
1996-11-11  0:00         ` Marcos F. F. de Macedo
1996-11-12  0:00         ` Matt Kennel
1996-11-12  0:00         ` Benedict A. Gomes
1996-10-29  0:00   ` Eiffel and Java + Ada dispatching Vincent WEBER
1996-10-30  0:00     ` Don Harrison
1996-10-30  0:00       ` Jon S Anthony
1996-10-30  0:00     ` Jean-Marc Jezequel
1996-11-01  0:00       ` Don Harrison
1996-11-01  0:00       ` Joachim Durchholz
1996-10-30  0:00   ` Eiffel and Java David Petrie Stoutamire
1996-10-30  0:00   ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-04  0:00     ` Don Harrison
1996-11-04  0:00       ` C to Ada Ali Mirhosseini
1996-11-04  0:00         ` Matthew Daniel
1996-11-04  0:00         ` Robert Dewar
1996-11-05  0:00       ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-05  0:00         ` Don Harrison
1996-11-06  0:00           ` Jon S Anthony
1996-10-30  0:00   ` Robert I. Eachus
1996-10-31  0:00   ` Joachim Durchholz
1996-10-31  0:00   ` Jon S Anthony
1996-11-01  0:00     ` Jean-Marc Jezequel
     [not found]     ` <E06F2B.Az7@syd.csa.com.au>
1996-11-01  0:00       ` Jon S Anthony
1996-11-04  0:00         ` Don Harrison
1996-11-05  0:00           ` Jon S Anthony
1996-11-02  0:00       ` Robert Dewar
1996-11-04  0:00         ` Norman H. Cohen
1996-11-05  0:00         ` Don Harrison [this message]
1996-11-05  0:00           ` Joachim Durchholz
1996-11-05  0:00           ` Robb Nebbe
1996-11-06  0:00             ` Jean-Marc Jezequel
1996-11-07  0:00               ` Robb Nebbe
1996-11-06  0:00             ` To overload or not to overload (was Eiffel and Java + Ada dispatching) Don Harrison
1996-11-06  0:00               ` Robb Nebbe
1996-11-07  0:00                 ` Don Harrison
1996-11-07  0:00                   ` Jon S Anthony
1996-11-07  0:00                   ` Juergen Schlegelmilch
1996-11-08  0:00                     ` Don Harrison
1996-11-08  0:00                       ` Don Harrison
1996-11-14  0:00                         ` Jon S Anthony
1996-11-14  0:00                     ` Jon S Anthony
1996-11-07  0:00                   ` Jon S Anthony
1996-11-11  0:00                     ` Don Harrison
1996-11-08  0:00                   ` bill.williams
1996-11-11  0:00                     ` Don Harrison
1996-11-07  0:00                 ` Norman H. Cohen
1996-11-08  0:00             ` Eiffel and Java + Ada dispatching Robert I. Eachus
1996-11-06  0:00           ` Robert I. Eachus
1996-11-08  0:00             ` Don Harrison
1996-11-08  0:00               ` Robert A Duff
1996-11-12  0:00                 ` Don Harrison
1996-11-12  0:00                   ` Robert A Duff
1996-11-13  0:00                     ` Don Harrison
1996-11-13  0:00                       ` Robert A Duff
1996-11-14  0:00                         ` Don Harrison
1996-11-13  0:00                       ` Jon S Anthony
1996-11-15  0:00                         ` Don Harrison
1996-11-19  0:00                           ` Jon S Anthony
1996-11-20  0:00                             ` Don Harrison
1996-11-12  0:00                   ` Joachim Durchholz
1996-11-15  0:00                     ` Richard Riehle
1996-11-16  0:00                     ` Interfacing contracts (Was: Eiffel and Java + Ada dispatching) Geert Bosch
1996-11-17  0:00                       ` Robert A Duff
1996-11-08  0:00               ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-14  0:00               ` Robert I. Eachus
1996-11-14  0:00                 ` Robert A Duff
1996-11-15  0:00                 ` Don Harrison
1996-11-15  0:00                   ` Robert I. Eachus
1996-11-19  0:00                     ` Don Harrison
1996-11-18  0:00                       ` Vincent Celier
1996-11-22  0:00                         ` Don Harrison
1996-11-19  0:00                 ` Jon S Anthony
1996-11-15  0:00               ` portmanteau (was Re: Eiffel and Java + Ada dispatching) Robert I. Eachus
1996-11-07  0:00           ` Eiffel and Java + Ada dispatching Robb Nebbe
1996-11-07  0:00           ` Jon S Anthony
1996-11-12  0:00           ` Jon S Anthony
1996-11-01  0:00   ` Eiffel and Java Matthias Ernst
1996-11-01  0:00     ` William Clodius
1996-11-01  0:00     ` Benedict A. Gomes
1996-11-02  0:00   ` Eiffel and Java + Ada dispatching Jon S Anthony
1996-11-02  0:00   ` Jon S Anthony
1996-11-04  0:00   ` Eiffel and Java Robert I. Eachus
1996-10-30  0:00 ` Jon S Anthony
1996-11-01  0:00   ` Don Harrison
1996-11-01  0:00     ` Jon S Anthony
1996-11-07  0:00       ` Marcos F. F. de Macedo
1996-11-11  0:00         ` Ian Joyner
1996-11-12  0:00         ` Don Harrison
1996-11-13  0:00           ` Norman H. Cohen
1996-11-15  0:00             ` Don Harrison
1996-11-14  0:00           ` Jon S Anthony
1996-11-15  0:00             ` Don Harrison
1996-11-19  0:00               ` Jon S Anthony
1996-11-21  0:00                 ` Don Harrison
1996-11-12  0:00     ` Jon S Anthony
1996-10-31  0:00 ` Joachim Durchholz
1996-11-01  0:00 ` Jon S Anthony
1996-11-02  0:00 ` Jon S Anthony
1996-11-03  0:00 ` Eiffel and Java + Ada dispatching Joachim Durchholz
1996-11-04  0:00 ` Eiffel and Java Richard A. O'Keefe
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