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From: dag@control.lth.se (Dag Bruck)
Subject: Re: Encapsulation in Ada vs. C++ (Was Re: Ichibah [sic] ...)
Date: Tue, 16 Mar 1993 06:34:23 GMT
Date: 1993-03-16T06:34:23+00:00	[thread overview]
Message-ID: <1993Mar16.063423.4679@lth.se> (raw)
In-Reply-To: 1993Mar11.082214@lglsun.epfl.ch

In <comp.lang.ada> magnus@lglsun.epfl.ch (Magnus Kempe) writes:
>
>To achieve this, operators would have to be "friends" in C++,
>because of its equation "module = class"; however, the problem
>with such an approach is that _anyone_ can then claim to be a
>"friend", and therefore _anyone_ can break the abstraction of
>the class.

This is incorrect.

A class grants friendship to other functions or classes, which means
that the author of a class controls who gets access to the private
members of the class.  You cannot grant yourself access to any random
class.

			-- Dag Bruck



  reply	other threads:[~1993-03-16  6:34 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1993-03-07 19:15 Ichibah flames, and flames out over, Ada 9X John Goodsen
1993-03-08  0:45 ` David Emery
1993-03-08 15:36 ` Tucker Taft
1993-03-08 16:28   ` Michael Feldman
1993-03-08 22:15     ` Gregory Aharonian
1993-03-09 14:20       ` Tucker Taft
1993-03-09 14:55         ` C. Michael Holloway
1993-03-10 14:51         ` Gregory Aharonian
1993-03-09 17:12       ` Harry Koehnemann
1993-03-09 20:54         ` Michael Feldman
1993-03-09 20:14       ` Larry M. Jordan
1993-03-09 17:49     ` Harry Koehnemann
1993-03-09 21:01       ` Michael Feldman
1993-03-09 18:12   ` Tom Wicklund
1993-03-11  8:04     ` Encapsulation in Ada vs. C++ (Was Re: Ichibah [sic] ...) Magnus Kempe
1993-03-16  6:34       ` Dag Bruck [this message]
1993-03-16  7:51         ` Magnus Kempe
1993-03-16  9:51           ` Dag Bruck
1993-03-09 18:53   ` Ichibah flames, and flames out over, Ada 9X Larry M. Jordan
1993-03-09 20:24     ` David Weller
1993-03-09 21:03       ` Michael Feldman
1993-03-12 14:49         ` Tucker Taft
1993-03-12 23:54           ` Michael Feldman
1993-03-16 17:34   ` Robert Firth
  -- strict thread matches above, loose matches on Subject: below --
1993-03-16 22:37 Encapsulation in Ada vs. C++ (Was Re: Ichibah [sic] ...) John Goodsen
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