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From: "G.B." <bauhaus@futureapps.invalid>
Subject: Re: Quick question regarding limited type return syntax
Date: Mon, 04 Aug 2014 18:51:47 +0200
Date: 2014-08-04T18:51:47+02:00	[thread overview]
Message-ID: <lrodn3$3cr$1@dont-email.me> (raw)
In-Reply-To: <b599l7xa69p2$.1mgyr1w2e2j0p$.dlg@40tude.net>

On 04.08.14 18:38, Dmitry A. Kazakov wrote:
> How can you call an operation of the type on an object of this type when
> the former is not yet operational?

In a way that is somewhat like you say, namely on a partial
object when it is needed only partially:

    T.comp_1: allocated and possibly initialized
    S.comp_2: not even allocated

    overriding
    procedure Foo (X : in out S) is
    begin
       null;
    end Foo;

may "validly" become:

   alloc	comp_1
   jump	s.foo

s.foo:
   ret

Lousy, but it may "work", even when, without optimization,
some "non-existing junk" is copied for X (if it's not by ref).
Not that I want that! Just imagine the outcome should the
arbitrary location happen to be volatile…




  reply	other threads:[~2014-08-04 16:51 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-07-30 23:51 Quick question regarding limited type return syntax NiGHTS
2014-07-31  0:02 ` Adam Beneschan
2014-07-31  0:56   ` NiGHTS
2014-07-31  0:48 ` Shark8
2014-07-31  1:00   ` NiGHTS
2014-07-31  1:29     ` Adam Beneschan
2014-07-31  1:38       ` NiGHTS
2014-07-31  4:01         ` Shark8
2014-08-01  2:12       ` Randy Brukardt
2014-08-01  3:40         ` Shark8
2014-08-01  7:57         ` J-P. Rosen
2014-08-01 19:23           ` Randy Brukardt
2014-08-01 19:37             ` J-P. Rosen
2014-08-01 20:53             ` Shark8
2014-08-02  7:11               ` Niklas Holsti
2014-08-02  7:34                 ` Dmitry A. Kazakov
2014-08-02 13:20                   ` Robert A Duff
2014-08-02 13:44                     ` Dmitry A. Kazakov
2014-08-02 14:34                       ` Robert A Duff
2014-08-02 16:56                         ` Dmitry A. Kazakov
2014-08-02 20:35                           ` Niklas Holsti
2014-08-03  7:30                             ` Dmitry A. Kazakov
2014-08-04  9:24                               ` Niklas Holsti
2014-08-04 10:42                                 ` G.B.
2014-08-04 11:39                                   ` Peter Chapin
2014-08-04 17:49                                     ` Niklas Holsti
2014-08-04 11:36                                 ` Peter Chapin
2014-08-04 12:43                                 ` Dmitry A. Kazakov
2014-08-04 16:19                                   ` G.B.
2014-08-04 16:38                                     ` Dmitry A. Kazakov
2014-08-04 16:51                                       ` G.B. [this message]
2014-08-04 17:23                                         ` Dmitry A. Kazakov
2014-08-04 19:37                                   ` Niklas Holsti
2014-08-05  8:30                                     ` Dmitry A. Kazakov
2014-08-05 19:24                                       ` Randy Brukardt
2014-08-03 16:35                           ` Robert A Duff
2014-08-02  8:02               ` Jacob Sparre Andersen
2014-08-02 19:20                 ` Shark8
2014-08-03 16:07                   ` Default values (Was: Quick question regarding limited type return syntax) Jacob Sparre Andersen
2014-08-04 21:29                     ` Randy Brukardt
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