From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: Proposed change to BC iterator parameters
Date: Sun, 21 Dec 2003 14:58:35 +0100
Date: 2003-12-21T14:58:35+01:00 [thread overview]
Message-ID: <bs48ih$9e9ea$3@ID-77047.news.uni-berlin.de> (raw)
In-Reply-To: xbWdnX7HmtSPA3miRVn-vw@comcast.com
Robert I. Eachus wrote:
> Currently I often provide tools in my data structures packages to
> provide everything viewed as an array. This allows me to do what Bob
> wants, but it would be really nice to extend the language so that
> iterators are first class objects known to the language so that the
> above pseudo code (for E in ...) would be supported if the
> Some_Structure package provided an iterator. You should also be able to
> say
>
> if E in My_Structures.Some_Iterator then ...
>
> (This would require another signature in the template for iterators to
> make it efficient.)
>
> Do I think this will make it into Ada 0Y? No. Ada 1Z? Possibly.
>
> But the trick of having data structure packages return an array view of
> a collection, or actually an array of access values, is very, very
> useful. (Notice that the difference between such an iterator and normal
> iterators is that it provides a snapshot. Changes to the actual data
> structure while iterating through the array won't be visible in the
> loop. Often this is what you want. Sometimes it isn't, then it gets
> painful...)
But if interfaces are being added to Ada, why not to allow abstract array
interface? Then just make My_Structure an implementation of the abstract
array and here you are!
--
Regards,
Dmitry A. Kazakov
www.dmitry-kazakov.de
next prev parent reply other threads:[~2003-12-21 13:58 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-10 13:36 Proposed change to BC iterator parameters amado.alves
2003-12-10 16:47 ` Proposed change to BC iterator parameters [limitedness] Georg Bauhaus
2003-12-10 17:39 ` Proposed change to BC iterator parameters Martin Krischik
2003-12-10 18:22 ` Jeffrey Carter
2003-12-10 23:00 ` Robert A Duff
2003-12-11 1:00 ` Jeffrey Carter
2003-12-11 15:09 ` Robert A Duff
2003-12-11 8:33 ` Dmitry A. Kazakov
2003-12-10 20:50 ` Simon Wright
2003-12-10 23:12 ` Robert A Duff
2003-12-11 5:07 ` Steve
2003-12-11 15:24 ` Robert A Duff
2003-12-11 17:39 ` Jeffrey Carter
2003-12-12 22:22 ` Robert A Duff
2003-12-13 0:57 ` Jeffrey Carter
2003-12-17 20:59 ` Robert A Duff
2003-12-18 10:05 ` Dmitry A. Kazakov
2003-12-18 18:14 ` Robert A Duff
2003-12-19 10:53 ` Dmitry A. Kazakov
2003-12-19 16:17 ` Georg Bauhaus
2003-12-19 17:19 ` Dmitry A. Kazakov
2003-12-19 22:51 ` Robert A Duff
2003-12-20 12:20 ` Dmitry A. Kazakov
2003-12-19 22:47 ` Robert A Duff
2003-12-20 2:11 ` Stephen Leake
2003-12-20 19:08 ` Robert I. Eachus
2003-12-21 11:39 ` Simon Wright
2003-12-21 18:13 ` Robert I. Eachus
2003-12-21 13:58 ` Dmitry A. Kazakov [this message]
2003-12-22 1:25 ` Robert I. Eachus
[not found] ` <916oa1-c93.ln1@beastie.ix.netcom.com>
2003-12-13 16:57 ` Simon Wright
2003-12-12 5:29 ` Simon Wright
2003-12-12 22:26 ` Robert A Duff
2003-12-13 16:55 ` Simon Wright
2003-12-13 17:27 ` Dmitry A. Kazakov
2003-12-13 2:44 ` Steve
-- strict thread matches above, loose matches on Subject: below --
2003-12-23 10:40 amado.alves
2003-12-19 15:53 amado.alves
2003-12-19 23:05 ` Robert A Duff
2003-12-11 16:02 amado.alves
2003-12-11 15:05 ada_wizard
2003-12-11 16:45 ` Robert A Duff
2003-12-11 12:56 amado.alves
2003-12-17 20:25 ` Robert A Duff
2003-12-11 12:43 amado.alves
2003-12-11 12:33 amado.alves
2003-12-10 14:39 amado.alves
2003-12-10 5:46 Simon Wright
2003-12-10 18:12 ` Jeffrey Carter
2003-12-11 16:10 ` Martin Krischik
2003-12-10 20:59 ` Simon Wright
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