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From: dgibson@snoopy.cis.ohio-state.edu (david scott gibson)
Subject: Anything Else Like Child Units?
Date: 1997/08/04
Message-ID: <5s4v2eINN4ud@snoopy.cis.ohio-state.edu>#1/1
X-Deja-AN: 262294519
Organization: The Ohio State University,
 Department of Computer and Information Science
Newsgroups: comp.lang.ada
Date: 1997-08-04T00:00:00+00:00
List-Id: <comp.lang.ada>


Hi.  Does anyone know of another programming mechanism similar to
Ada's child units that supports unplanned component extension and
is not based on inheritance?  I would not include C++'s friend
functions since these do not seem to provide much support for 
unplanned extension.   Is the hierarchical library structure
unique to Ada, or was it based on some ideas from other languages?

Dave
--
dgibson@cis.ohio-state.edu