From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Limited_Controlled, orthogonality and related issues
Date: Fri, 19 Jan 2007 10:29:35 -0500
Date: 2007-01-19T10:29:35-05:00 [thread overview]
Message-ID: <wccvej3m3vk.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: eoned5$663$1@cernne03.cern.ch
Maciej Sobczak <no.spam@no.spam.com> writes:
> So, my simple decision to make T and S controlled required:
>
> 1. Changing the signatures of Do_The_Job and gazillion of similar
> subprograms.
> 2. Adding the tagged keyword in the public view for T and S.
>
> In conclusion, my decision to make T and S controlled appeared to not be
> orthogonal to the rest of the package.
I really can't get too excited about the fact that a change to the
package required other changes to the same package. If you said
that clients had to change, that would be a much bigger problem.
Possible solutions:
Allow 'Class on untagged types.
Use special syntax to distinguish dispatching operations.
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.
- Bob
next prev parent reply other threads:[~2007-01-19 15:29 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 [this message]
2007-01-19 16:31 ` Dmitry A. Kazakov
2007-01-19 16:36 ` Robert A Duff
2007-01-19 18:26 ` Dmitry A. Kazakov
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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