Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!pacbell.com!lll-winken!cs!erickson
From: erickson@cs.nps.navy.mil (David Erickson)
Newsgroups: comp.lang.ada
Subject: limited private types, "=" operator
Message-ID: <1152@cs.nps.navy.mil>
Date: 1 Aug 90 18:47:23 GMT
Reply-To: erickson@cs.nps.navy.mil (David Erickson)
Organization: Naval Postgraduate School, Monterey CA
Lines: 11

Is there any way to define "=" for a limited private type which is an
access type (which may be null)?  The problem arises trying to test for
null without producing an infinitely recursive definition.

The only solution that I am aware of is to use UNCHECKED_CONVERSION to
retype the access type during the test for null, but this is a hack.
Is there a cleaner solution?

Thanks -

	Dave Erickson