From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Limited_Controlled, orthogonality and related issues
Date: Fri, 19 Jan 2007 19:26:00 +0100
Date: 2007-01-19T19:25:48+01:00 [thread overview]
Message-ID: <saxsio4vbe0z.579ds1eq9cv4$.dlg@40tude.net> (raw)
In-Reply-To: wccfya7m0ra.fsf@shell01.TheWorld.com
On Fri, 19 Jan 2007 11:36:57 -0500, Robert A Duff wrote:
> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
>
>> On Fri, 19 Jan 2007 10:29:35 -0500, Robert A Duff wrote:
>>
>>> Make all types tagged. For efficiency, this would require a different
>>> run-time model than what Ada compilers currently do -- you don't want
>>> to store a tag field with every Boolean variable! To enable the
>>> non-stored-tag model, eliminate the rule that all tagged parameter
>>> are aliased (and allow "aliased" keyword).
>>>
>>> None of the above are likely to happen, I suspect.
>>
>> Even if we, all the Ada community, really wanted it?
>
> The Ada community wants compatibility with older versions of the
> language. What I described above is not compatible.
I don't directly see what and why.
We could make all types "tagged" with non-stored tags. The keyword "tagged"
would mean a stored tag + by-reference semantics. This looks fully backward
compatible to me, at first glance.
As for legacy exceptions, we should choose a model first. Is End_Error a
type (derived from Root_Exception) or a value of Root_Exception?
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2007-01-19 18:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-18 9:24 Limited_Controlled, orthogonality and related issues Maciej Sobczak
2007-01-18 12:00 ` Ludovic Brenta
2007-01-18 12:33 ` AW: " Grein, Christoph (Fa. ESG)
2007-01-18 16:25 ` Robert A Duff
2007-01-18 17:02 ` Adam Beneschan
2007-01-18 17:16 ` Adam Beneschan
2007-01-19 1:02 ` Robert A Duff
2007-01-19 7:38 ` Maciej Sobczak
2007-01-19 9:05 ` Dmitry A. Kazakov
2007-01-19 17:04 ` Adam Beneschan
2007-01-19 1:01 ` Robert A Duff
2007-01-19 9:57 ` Stephen Leake
2007-01-18 19:03 ` Jeffrey Carter
2007-01-19 7:48 ` Randy Brukardt
2007-01-19 16:46 ` Adam Beneschan
2007-01-19 15:29 ` Robert A Duff
2007-01-19 16:31 ` Dmitry A. Kazakov
2007-01-19 16:36 ` Robert A Duff
2007-01-19 18:26 ` Dmitry A. Kazakov [this message]
2007-01-19 20:17 ` Robert A Duff
2007-01-20 10:14 ` Dmitry A. Kazakov
2007-01-20 14:44 ` Robert A Duff
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