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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Generic warning
Date: Wed, 18 Jun 2008 11:10:29 -0400
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Date: 2008-06-18T11:10:29-04:00
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"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> writes:

> On Wed, 18 Jun 2008 14:32:28 +0000, S�bastien Morand wrote:
>
>>> (Newbie qiestion, coming from VHDL, halfway through the Barnes book)
>>> 
>>> Can you not create a subtype of Positive to reflect that, and declare
>>> both the array and index using that subtype?
>> 
>> I can't create a subtype using a parameter.
>
> No, no, you mean a *type*.
>
>> generic
>> 	Order: Positive;
>> package Test is
>> 	--  Can't work since Order is not defined at compile time
>> 	type MyType is range 1 .. Order;
>
> This would be a type. But you do can create a subtype:
>
>    subtype Index is range 1..Order; -- This is OK
>
> Subtypes can be dynamically constrained.

Yes.  You can also create a new type:

type Index is new Positive range 1..Order;

- Bob