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From: dale@cs.rmit.edu.au (Dale Stanbrough)
Subject: Re: Private Children
Date: 1999/06/22
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Richard D Riehle wrote:

"  Thanks Tucker. This is a good idea. Also, consider,
   
         package P.Hidden_Level.Public_Level is
           type some-type is tagged private;
           -- some publicly exported services
         private
           ...
         end P.Hidden_Level.Public_Level ;
  
         package body P.Hidden_Level.Public_Level is
            -- implement exported services using the
            -- private services in the hierarchy since
            -- the body can see the private declarations
            -- of parent its units.
         end P.Hidden_Level.Public_Level;"

It's still a bit ordinary though. The services offered in the
public level can't rely on abstractions advertised in the private
section, which I see as the major failure of this model.

Dale