From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Garbage Collection ???
Date: Thu, 19 Apr 2012 10:36:19 -0400
Date: 2012-04-19T10:36:19-04:00 [thread overview]
Message-ID: <wcc4nsf4wm4.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: 6997433.1158.1334740025722.JavaMail.geo-discussion-forums@ynmm10
Julian Leyh <julian@vgai.de> writes:
> Am Samstag, 14. April 2012 20:21:17 UTC+2 schrieb Robert A Duff:
>> In Ada 2012, you can say:
>>
>> type T_Ptr_Opt is access all T;
>> subtype T_Ptr is T_Ptr_Opt with
>> Dynamic_Predicate => T_Ptr /= null;
>
> In Ada 2005, you can already say:
>
> type T_Ptr_Opt is access all T;
> subtype T_Ptr is not null T_Ptr_Opt;
Right, but that's less useful, because it forces you
to initialize your variables (e.g. record components)
before you're ready to.
- Bob
next prev parent reply other threads:[~2012-04-19 14:36 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-13 12:14 Garbage Collection ??? ldries46
2012-04-13 13:20 ` Dmitry A. Kazakov
2012-04-13 19:27 ` ldries46
2012-04-13 20:06 ` Dmitry A. Kazakov
2012-04-13 22:49 ` Brian Drummond
2012-04-14 3:21 ` ldries46
2012-04-14 18:21 ` Robert A Duff
2012-04-18 9:07 ` Julian Leyh
2012-04-19 14:36 ` Robert A Duff [this message]
2012-04-19 20:26 ` Randy Brukardt
2012-04-20 7:11 ` Dmitry A. Kazakov
2012-04-21 0:46 ` Randy Brukardt
-- strict thread matches above, loose matches on Subject: below --
1992-04-22 18:55 Garbage collection? dog.ee.lbl.gov!overload.lbl.gov!agate!spool.mu.edu!yale.edu!jvnc.net!darw
1992-04-21 23:48 Robert I. Eachus
1992-04-21 23:02 Rick Hudson
1992-04-21 21:09 titan.ksc.nasa.gov!mcroberts
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