From: Dmitry A. Kazakov <mailbox@dmitry-kazakov.de>
Subject: Re: Concatenation and Characters
Date: Wed, 23 Oct 2002 11:34:35 +0200
Date: 2002-10-23T11:34:35+02:00 [thread overview]
Message-ID: <bnqcruc2csbd4265ep3mrkh41kl81qr723@4ax.com> (raw)
In-Reply-To: slrnarcpo7.pk.lutz@taranis.iks-jena.de
On Wed, 23 Oct 2002 09:08:24 +0000 (UTC), Lutz Donnerhacke
<lutz@iks-jena.de> wrote:
>* Dmitry A Kazakov wrote:
>>>However, you can write this:
>>>
>>> return (1..0 => 123);
>>>
>>>if the component type is Integer, say. This is annoying, because you
>>>have to invent a completely junk value -- 123 is never used.
>>
>> BTW, do you know a solution of this problem for generics? Let the
>> array element is a generic parameter and there is no Null_Element
>> parameter, where to get a junk value?
>
>There are several other cases where a default value can't be specified (task).
>Then I use
> declare
> empty : Array_Type (Offset_Type'Last ..
> Offset_Type'Pred(Offset_Type'Last));
> begin
> return empty;
> end;
There is a pathological case when this does not work:
type Index is new Integer range Integer'First..Integer'First;
type Array_Type is array (Index range <>) of Integer;
Empty : Array_Type (Index'Last..Index'Pred (Index'Last));
-- Constraint_Error
-------------------------------
Could we inroduce an attribute, say S'Empty, which for an array type
would give an empty array and for a discrete type an empty range?
---
Regards,
Dmitry Kazakov
www.dmitry-kazakov.de
next prev parent reply other threads:[~2002-10-23 9:34 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-10 14:50 Concatenation and Characters Justin Birtwell
2002-10-10 14:55 ` Preben Randhol
2002-10-10 15:04 ` Justin Birtwell
2002-10-10 15:22 ` Preben Randhol
2002-10-10 15:30 ` Justin Birtwell
2002-10-10 16:05 ` Georg Bauhaus
2002-10-10 16:07 ` Preben Randhol
2002-10-10 17:45 ` Robert A Duff
2002-10-10 15:32 ` Justin Birtwell
2002-10-10 15:36 ` Preben Randhol
2002-10-10 16:44 ` Mark Biggar
2002-10-10 17:45 ` Stephen Leake
2002-10-10 21:53 ` Mark Biggar
2002-10-18 17:03 ` Programmer Dude
2002-10-18 18:13 ` Preben Randhol
2002-10-18 18:36 ` Wes Groleau
2002-10-21 15:16 ` Georg Bauhaus
2002-10-18 21:33 ` Mark Biggar
2002-10-20 2:01 ` Dmitry A.Kazakov
2002-10-21 14:13 ` Wes Groleau
2002-10-21 15:22 ` Dmitry A. Kazakov
2002-10-21 19:38 ` Georg Bauhaus
2002-10-22 22:15 ` Dmitry A.Kazakov
2002-10-22 12:05 ` Georg Bauhaus
2002-10-22 12:19 ` Lutz Donnerhacke
2002-10-22 14:43 ` Georg Bauhaus
2002-10-23 8:39 ` Dmitry A. Kazakov
2002-10-23 14:39 ` Georg Bauhaus
2002-10-24 8:18 ` Dmitry A. Kazakov
2002-10-21 16:50 ` Warren W. Gay VE3WWG
2002-10-21 15:20 ` Georg Bauhaus
2002-10-21 17:51 ` Programmer Dude
2002-10-21 18:48 ` Jim Rogers
2002-10-21 19:44 ` tmoran
2002-10-21 20:42 ` Programmer Dude
2002-10-22 1:42 ` Jeffrey Carter
2002-10-22 14:37 ` Robert A Duff
2002-10-22 18:51 ` Jeffrey Carter
2002-10-23 7:01 ` Pascal Obry
2002-10-22 14:45 ` Matthew Heaney
2002-10-22 18:47 ` Jeffrey Carter
2002-10-22 21:31 ` Robert A Duff
[not found] ` <3DB59D75.20609 <wccd6q29n3l.fsf@shell01.TheWorld.com>
2002-10-23 2:02 ` Jeffrey Carter
2002-10-23 13:16 ` Matthew Heaney
2002-10-23 19:11 ` Jeffrey Carter
2002-10-23 15:24 ` Robert A Duff
2002-10-23 19:24 ` Jeffrey Carter
2002-10-24 0:33 ` Robert A Duff
2002-10-22 3:46 ` Jim Rogers
2002-10-22 14:48 ` Robert A Duff
2002-10-22 15:02 ` Fraser Wilson
2002-10-22 15:38 ` David C. Hoos
2002-10-22 15:44 ` Fraser Wilson
2002-10-22 16:13 ` Robert A Duff
2002-10-23 8:58 ` Dmitry A. Kazakov
2002-10-23 9:08 ` Lutz Donnerhacke
2002-10-23 9:34 ` Dmitry A. Kazakov [this message]
2002-10-23 10:10 ` Lutz Donnerhacke
2002-10-23 17:15 ` Frank J. Lhota
2002-10-24 8:41 ` Dmitry A. Kazakov
2002-10-24 9:25 ` Fraser Wilson
2002-10-24 14:13 ` Matthew Heaney
[not found] ` <un <wcc7kgazc20.fsf@shell01.TheWorld.com>
2002-10-22 16:46 ` David C. Hoos
2002-10-22 8:51 ` Stuart Palin
2002-10-22 18:56 ` Programmer Dude
2002-10-21 19:42 ` Georg Bauhaus
-- strict thread matches above, loose matches on Subject: below --
2002-10-11 5:04 Grein, Christoph
2002-10-11 10:30 ` Preben Randhol
2002-10-23 5:15 Grein, Christoph
2002-10-23 13:19 ` Matthew Heaney
2002-10-24 5:53 Grein, Christoph
2002-10-24 14:04 ` Matthew Heaney
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