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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: unsigned type
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Date: Mon, 29 Jun 2009 10:54:54 +0200
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Date: 2009-06-29T10:51:41+02:00
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On Mon, 29 Jun 2009 01:42:31 -0700 (PDT), Martin wrote:

> On Jun 29, 12:08�am, a...@anon.org (anon) wrote:
>> And as for Natural, well, that is the definition of a String's index and in most
>> cases you use Naturals in "for loop' statements.
> 
> Why would you do that?
> 
> If you iterating over an array object (e.g. a String), you should use
> 'Range, e.g.
> 
>    for I in My_Array'Range loop
>       -- whatever
>    end loop;

Exactly. However there are cases like copying element of one array into
another, when you have to specify the index type explicitly. I always
wished an attribute Index, which for arrays would yield the index subtype
of the array:

   Index : A'Index;

Another issue is shifted views of arrays. E.g. when you get two arrays A
and B, you could bring them to a coherent index range.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de