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From: Robert Dewar <robert_dewar@my-deja.com>
Newsgroups: comp.lang.ada
Subject: Re: Subprogram types vs. "limited access" (was Re: Do we need
 "Mission-Critical" software? Was: What to Do?
Date: Tue, 16 Jan 2001 00:32:43 GMT
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Date: 2001-01-16T00:32:43+00:00
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In article <93vonj$3td$1@nnrp1.deja.com>,
  mark_lundquist@my-deja.com wrote:
> Kind of, but not really :-).  Objects of T'Class really are
_objects_,
> even if you can't declare an object to be of type T'Class.
Classwide
> types are formally defined to be indefinite, as are
unconstrained
> types.  So you can't declare an object of type T'Class, for
the same
> reason that you cannot declare an object of type String.


That seems a little misleading, you most certainly can declare

  a : string := "hello";

and the nominal type of a is indeed string. Note that the
declaration:

  a : string (1 .. 5) := "hello";

is NOT the same declaration, and if you make these variables
aliased, you immediately run into the real difference between
these two declarations.


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