From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: memory management in Ada: tedious without GC?
Date: Mon, 26 May 2008 10:16:46 +0200
Date: 2008-05-26T10:16:46+02:00 [thread overview]
Message-ID: <13wvn489e126b.ek2a2q31er30$.dlg@40tude.net> (raw)
In-Reply-To: wccve12blzd.fsf@shell01.TheWorld.com
On Sun, 25 May 2008 08:35:02 -0400, Robert A Duff wrote:
> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
>
>> type X is record
>> A : Boolean := False;
>> B : Integer := 1;
>> C : Boolean := False;
>> end record;
>>
>> May the compiler group A and C and initialize both them by zeroing memory?
>
> Yes.
>
>> If the initialization order were fixed, that would be illegal to do.
>
> No -- it's perfectly legal for the compiler to initialize in any order
> here, because the order does not affect the semantics (and it's easy for
> the compiler to prove that).
In this case. But there could be much more complex cases with user-defined
initialization involved. There should be a clear rule to determine if the
semantics is order-independent. This semantics should follow from the
contracts, rather than from the implementation.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2008-05-26 8:16 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 17:44 memory management in Ada: tedious without GC? jhc0033
2008-05-16 18:56 ` Ludovic Brenta
2008-05-16 20:42 ` Maciej Sobczak
2008-05-16 21:45 ` Ivan Levashew
2008-05-16 22:59 ` Peter C. Chapin
2008-05-17 5:24 ` jhc0033
2008-05-17 7:50 ` Ivan Levashew
2008-05-16 23:05 ` Randy Brukardt
2008-05-19 3:50 ` Matthew Heaney
2008-05-19 7:55 ` Dmitry A. Kazakov
2008-05-19 13:18 ` Georg Bauhaus
2008-05-19 14:16 ` Dmitry A. Kazakov
2008-05-23 23:15 ` Robert A Duff
2008-05-24 0:45 ` Randy Brukardt
2008-05-24 8:25 ` Dmitry A. Kazakov
2008-05-24 16:14 ` Robert A Duff
2008-05-24 19:04 ` Dmitry A. Kazakov
2008-05-24 20:52 ` Robert A Duff
2008-05-25 8:12 ` Dmitry A. Kazakov
2008-05-25 11:28 ` Maciej Sobczak
2008-05-25 12:35 ` Robert A Duff
2008-05-26 8:16 ` Dmitry A. Kazakov [this message]
2008-05-24 19:39 ` Georg Bauhaus
2008-05-24 20:45 ` Robert A Duff
2008-05-19 8:35 ` Maciej Sobczak
2008-05-19 15:11 ` Matthew Heaney
2008-05-19 21:13 ` Maciej Sobczak
2008-05-23 23:03 ` Robert A Duff
2008-05-24 0:12 ` Adam Beneschan
2008-05-16 22:45 ` anon
2008-05-17 7:34 ` Pascal Obry
2008-05-17 15:11 ` Bob Klungle
2008-05-17 15:27 ` Pascal Obry
2008-05-17 16:18 ` Georg Bauhaus
2008-05-20 8:04 ` Ole-Hjalmar Kristensen
2008-05-20 8:01 ` Ole-Hjalmar Kristensen
2008-05-20 10:03 ` Martin Krischik
2008-05-17 17:23 ` Martin Krischik
2008-05-17 16:51 ` Maciej Sobczak
2008-05-17 17:45 ` Pascal Obry
2008-05-17 22:28 ` Samuel Tardieu
2008-05-18 7:03 ` Martin Krischik
2008-05-18 8:50 ` jhc0033
2008-05-18 9:31 ` Dmitry A. Kazakov
2008-05-18 14:10 ` Maciej Sobczak
2008-05-18 14:59 ` Dmitry A. Kazakov
2008-05-18 20:51 ` Maciej Sobczak
2008-05-19 8:36 ` Dmitry A. Kazakov
2008-05-18 15:03 ` Martin Krischik
2008-05-18 18:27 ` jhc0033
2008-05-19 4:12 ` Matthew Heaney
2008-05-19 8:39 ` Maciej Sobczak
2008-05-19 15:37 ` Matthew Heaney
2008-05-19 21:21 ` Maciej Sobczak
2008-05-19 23:02 ` Matthew Heaney
2008-05-19 10:27 ` Martin Krischik
2008-05-17 22:42 ` Peter C. Chapin
2008-05-18 6:58 ` Martin Krischik
2008-05-18 6:52 ` Martin Krischik
2008-05-18 14:16 ` Maciej Sobczak
2008-05-17 14:30 ` Brian Drummond
2008-05-17 16:47 ` Maciej Sobczak
2008-05-19 14:45 ` Brian Drummond
2008-05-20 7:42 ` Maciej Sobczak
2008-05-20 18:01 ` jayessay
2008-05-18 8:06 ` Simon Wright
2008-05-18 14:21 ` Maciej Sobczak
2008-05-18 20:48 ` Simon Wright
2008-05-19 14:40 ` Brian Drummond
2008-05-19 3:44 ` Matthew Heaney
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