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From: Marius Amado Alves <amado.alves@netcabo.pt>
Newsgroups: comp.lang.ada
Subject: Re: library level required or not?
Date: Mon, 1 Mar 2004 23:32:43 +0000
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Date: 2004-03-01T23:32:43+00:00

> > If you look at the GNAT sources for example, you'll find that
> > Unbounded_String is controlled. And yet you can declare an unbounded
> > string inside a 'main' program. Try pulling that out with your own
> > controlled type.
>
> ?
>
> There is a difference between instantiating the generic, which amounts
> to defining a new type derived from Controlled, and declaring an
> instance of a type

You're right, I mixed things up... a bit.

> .. is this 3.9.1(3)?

I think so, that it is that clause that ultimately obliges controlled objects 
to be defined at library level. So what's the deal with Unbounded_String? 
(ISNBAL too, obvioulsy.)