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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: TYPE'Size in static expression
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Date: Mon, 24 Oct 2005 13:45:51 +0200
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Date: 2005-10-24T13:45:52+02:00
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On Mon, 24 Oct 2005 12:56:31 +0200, Francisco J. Montoya wrote:

> That, indeed, solved my problem, but I still do not finish in 
> understanding why what I wrote did not work. The expression I wrote is 
> supposed to be of "Universal Integer Type", isn't it? So adding the 
> explicit type "Integer" to the constant definition should not make much 
> difference.

"Universal integer constant" have to be static. But just constant T need
not to be. This makes the difference. So you could also write:

type Buffer is array (1..8 * Buffer_Size / BaseType'Size) of BaseType;

Ada's rules about static expressions are a bit tricky. But for a generic
body, it is clear that BaseType'Size cannot be static.

[ Or, well, it could be, if generics were treated like C++ templates. But
then sharing of generic bodies would be difficult, if possible. ]

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