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From: Eric Hughes <eric.eh9@gmail.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada.Strings.Bounded
Date: Tue, 15 Apr 2008 19:51:17 -0700 (PDT)
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Date: 2008-04-15T19:51:17-07:00
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On Tue, 15 Apr 2008 07:20:15 -0700 (PDT), Eric Hughes wrote:
> Perhaps you could explain what you want universal_integer to be.

On Apr 15, 9:23 am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
wrote:
> Merely the type of a static numeric expression. Well, it isn't, a
> counterexample is:
>
>    A'Length  (ARM 3.6.2)

The fact that lengths are limited does not mean that their values
cannot sit within a type whose values are not.  The set of possible
values of lengths for a certain compiler are a subset of the values of
universal_integer.

> Universal_Integer is not necessarily Root_Integer, but somewhere close to
> the root of Root_Integer'Class.

"Somewhere close" is not a definition.  Please be more specific.

> > If you can show me a Ada definition that can store a
> > universal_integer, only then will I believe you that it's the kind of
> > type that's just like an ordinary Ada type.
>
>    type T is abstract private;
>
> Can you store T?

By ordinary type, I mean the kind that's assignable, not abstract, not
an interface, something you can declare a variable of.

Eric