From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Half Constrained Array Types and Slices
Date: 10 Mar 2006 12:33:46 -0500
Date: 2006-03-10T12:33:46-05:00 [thread overview]
Message-ID: <wccr75aurut.fsf@shell01.TheWorld.com> (raw)
In-Reply-To: 1pfxe79p64svi.1txsf811gbkrr.dlg@40tude.net
"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:
> There is, but for most of finite bounds a string range would contain an
> uncountable number of items. For example "A".."B". This range includes
> "AA", "AAA", etc. This might be is undesirable, however, it would be
> interesting to think about how to deal with bounded infinite ranges, like
> "A".."B".
Note quite infinite, since X'Last <= Natural'Last for all Strings X.
And I suppose the highest value of String is:
(Positive => Character'Last)
This leads nowhere useful! ;-)
If you want "arrays" indexed by strings, you really want sparse arrays
implemented as hash tables or some such. I call those "mappings", not
"arrays". See the Containers library of Ada 2005.
>... After all [universal] floating-point ranges are allowed in Ada,
> and they aren't finite...
And they're not allowed in 'for' loops, nor as array indices.
Which is a good thing.
- Bob
next prev parent reply other threads:[~2006-03-10 17:33 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-02 5:00 Half Constrained Array Types and Slices Jeffrey R. Carter
2006-03-02 8:34 ` Dmitry A. Kazakov
2006-03-02 15:34 ` Georg Bauhaus
2006-03-02 19:37 ` Dmitry A. Kazakov
2006-03-02 20:06 ` Jeffrey R. Carter
2006-03-02 20:37 ` Dmitry A. Kazakov
2006-03-02 21:01 ` Robert A Duff
2006-03-02 20:40 ` Robert A Duff
2006-03-02 14:32 ` Larry Kilgallen
2006-03-02 20:08 ` Jeffrey R. Carter
2006-03-02 20:48 ` Robert A Duff
2006-03-06 2:16 ` Larry Kilgallen
2006-03-06 18:50 ` Martin Krischik
2006-03-02 20:38 ` Robert A Duff
2006-03-03 5:15 ` Jeffrey R. Carter
2006-03-03 8:57 ` Dmitry A. Kazakov
2006-03-03 23:41 ` Robert A Duff
2006-03-06 17:50 ` Jeff Carter
2006-03-06 18:31 ` Dmitry A. Kazakov
2006-03-07 19:02 ` Jeff Carter
2006-03-08 14:29 ` Dmitry A. Kazakov
2006-03-09 22:44 ` Robert A Duff
2006-03-10 8:46 ` Dmitry A. Kazakov
2006-03-06 19:49 ` Stefan Lucks
2006-03-08 17:36 ` brian.b.mcguinness
2006-03-08 17:56 ` Jeff Carter
2006-03-09 22:36 ` Robert A Duff
2006-03-10 4:28 ` Jeffrey R. Carter
2006-03-10 8:46 ` Dmitry A. Kazakov
2006-03-10 17:33 ` Robert A Duff [this message]
2006-03-10 21:24 ` Dmitry A. Kazakov
2006-03-10 17:38 ` Robert A Duff
2006-03-11 0:19 ` Randy Brukardt
2006-03-11 1:43 ` Jeffrey R. Carter
2006-03-11 8:38 ` Niklas Holsti
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