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From: rtcoslet@rockwellcollins.com (R. Tim Coslet)
Newsgroups: comp.lang.ada
Subject: Re: How Can I Create A Class Dynamically
Date: 2 Oct 2001 16:13:32 -0700
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 <slrn9rgoo2.k8.lutz@taranis.iks-jena.de>
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lutz@iks-jena.de (Lutz Donnerhacke) wrote in message news:<slrn9rgoo2.k8.lutz@taranis.iks-jena.de>...
> * Anthony E. Glover wrote:
> >I have a class hierarchy defined and I would like to be able to read a
> >string and then dynamically creating a pointer to an object of the type
> >specified by the string. Similar I think to class loading and class
> >factories in Java. Can this be done in Ada95. If so, how. I have looked at
> >the Ada.Tags packages and this looks like it might be helpfull, but I'm not
> >quite sure how to make use of it. I would basically like to be able to avoid
> >having to specify a case statement or if block when initially creating my
> >objects.
> 
> IMHO this is not possible, due to missing typeness.

Have you looked at the package Ada.Streams.Stream_IO ?

This package was designed specifically to allow input/output of tagged
types (the file is NOT a text file however).

Even if Stream_IO isn't exactly what you are looking for you might
find some clues here as to how to do what you need.