From: Brian May <bam@snoopy.apana.org.au>
Subject: Re: APQ
Date: Wed, 05 Jan 2005 08:32:53 +1100
Date: 2005-01-05T08:32:53+11:00 [thread overview]
Message-ID: <sa41xd0c22i.fsf@snoopy.apana.org.au> (raw)
In-Reply-To: zj01txsolhws$.1l49jvgadzcgz$.dlg@40tude.net
>>>>> "Dmitry" == Dmitry A Kazakov <mailbox@dmitry-kazakov.de> writes:
Dmitry> You probably mean this:
Dmitry> function Copy (C : Root_Connection_Type'Class)
Dmitry> return Root_Connection_Ptr is
Dmitry> begin
Dmitry> return new Root_Connection_Type'Class'(C);
Dmitry> end Copy;
Dmitry> This indeed cannot work for limited types. This was the
Dmitry> reason why Copy was declared abstract primitive instead:
Dmitry> function Copy (C : Root_Connection_Type)
Dmitry> return Root_Connection_Ptr is abstract;
Dmitry> It will dispatch to an implementation which knows how to
Dmitry> copy itself:
I am under the impression (perhaps wrong impression, I haven't tested
it) that
A := Copy(C);
will not work if C is a limited type, as there is an implied copy
operation from the RHS to the LHS.
Also the thread "Return_By_Reference or Return_By_Copy (GNAT bug?)" might
be relevant here.
--
Brian May <bam@snoopy.apana.org.au>
next prev parent reply other threads:[~2005-01-04 21:32 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-15 23:31 APQ Brian May
2004-12-16 11:34 ` APQ Warren W. Gay VE3WWG
2004-12-16 23:58 ` APQ Randy Brukardt
2004-12-17 3:45 ` APQ Brian May
2004-12-17 4:03 ` APQ Warren W. Gay VE3WWG
2004-12-17 4:38 ` APQ Brian May
2004-12-17 9:06 ` APQ Egil H. H�vik
2004-12-17 11:42 ` APQ Brian May
2004-12-17 22:55 ` APQ Brian May
2004-12-18 15:52 ` APQ Warren W. Gay VE3WWG
2004-12-18 18:23 ` APQ Dmitry A. Kazakov
2004-12-21 23:34 ` APQ Brian May
2004-12-22 8:57 ` APQ Dmitry A. Kazakov
2004-12-22 10:07 ` APQ Martin Krischik
2004-12-22 13:15 ` APQ Dmitry A. Kazakov
2004-12-22 16:53 ` APQ Martin Krischik
2004-12-22 17:21 ` APQ Dmitry A. Kazakov
2004-12-22 18:23 ` APQ Martin Krischik
2004-12-17 8:59 ` APQ Stephen Leake
2004-12-17 14:12 ` APQ Dmitry A. Kazakov
2004-12-17 23:20 ` APQ Brian May
2004-12-18 16:13 ` APQ Dmitry A. Kazakov
2004-12-21 23:29 ` APQ Brian May
2004-12-22 9:14 ` APQ Dmitry A. Kazakov
2005-01-04 21:32 ` Brian May [this message]
2005-01-05 11:58 ` APQ Dmitry A. Kazakov
2004-12-23 17:04 ` APQ (Connection Cloning) Warren W. Gay VE3WWG
2004-12-23 17:55 ` Georg Bauhaus
2004-12-23 18:52 ` Warren W. Gay VE3WWG
2005-01-03 7:40 ` Frank Piron
2004-12-17 13:54 ` APQ Dmitry A. Kazakov
-- strict thread matches above, loose matches on Subject: below --
2004-12-16 4:37 APQ Christoph Karl Walter Grein
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