From: Stephane.Barbey@di.epfl.ch (Stephane Barbey)
Subject: Re: An Ada9X mimic of C++ friends?
Date: 9 Feb 1995 09:59:40 GMT
Date: 1995-02-09T09:59:40+00:00 [thread overview]
Message-ID: <1995Feb9.085457@di.epfl.ch> (raw)
In-Reply-To: 3hcao9$96b@solar.sky.net
In article <3hcao9$96b@solar.sky.net>, jhoward@solar.sky.net (John Howard)
: So my question is: does the explicit use of "TAGGED" in Ada95 have the same
: negative consequences as specifying "virtual"?
No, Ada 83 and Ada 95 take the approach that every primitive operation
(i.e. method) of a tagged type (i.e. a class) can be freely overriden.
The reserved words "virtual" (C++) or "override" (Object Pascal) are
not needed in Ada 95, because dispatching (i.e. dynamic binding) does
not occur on a by-method basis, but on a by-call basis (i.e. the
dispatching calls), thus providing all the power and more flexibility
than typical OO languages.
-Stephane
--
Stephane Barbey "It's not easy getting real wings"
INJ-335, barbey@di.epfl.ch
next prev parent reply other threads:[~1995-02-09 9:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
1995-02-07 13:55 An Ada9X mimic of C++ friends? Donald M Needham
1995-02-07 22:38 ` David Weller
1995-02-08 9:32 ` Michel Gauthier
1995-02-08 16:27 ` Cyrille Comar
1995-02-09 5:55 ` John Howard
1995-02-09 9:59 ` Stephane Barbey [this message]
1995-02-09 21:16 ` Norman H. Cohen
1995-02-10 23:11 ` Cyrille Comar
-- strict thread matches above, loose matches on Subject: below --
1995-02-07 19:56 Dave Papay M/S 7G32 x2791
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