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From: Thomas Schmidt <tc.schmidt@gmx.net>
Newsgroups: comp.lang.ada
Subject: Howto declare an Ada container with access to objects of a class
 hierachy
Date: Thu, 13 Jun 2013 00:43:22 +0000 (UTC)
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Date: 2013-06-13T00:43:22+00:00
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Hi,

Hoping this Is the right newsgroup for asking my question.

I want to set up a hashed set of accesses (allocated from heap) to objects
of a given class hierarchie (the top class may f.e. be called "Top"). I
decided to use "Ada.Containers.Indefinite_Hashed_Sets". The hash method
should be a primitive which may be overwritten by derived classes. I've
declared Tops hash functions formal parameter as of type "access Top". How
do I've to declare the sets Element_Type? I think if I use "Top'Access" it
wouldn't fit the hash functions 
parameter type nor could I store objects of classes derived from "Top".

Sorry, i'm just a beginner coming from C/C++.

Thomas