Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!rutgers!mit-eddie!YAHI.STANFORD.EDU!tiemann
From: tiemann@YAHI.STANFORD.EDU (Michael Tiemann)
Newsgroups: comp.lang.c++
Subject: C++ language question
Message-ID: <8905072006.AA17050@yahi.stanford.edu>
Date: 7 May 89 20:06:50 GMT
Sender: daemon@eddie.MIT.EDU
Reply-To: tiemann@lurch.stanford.edu
Lines: 15

I need some help refreshing my memory.

Given that we have a base class B and a class D derived from B, it is
permissable to convert from a D* to a B*, provided visibility rules
are not violated.  Similarly for a D& to a B&.

(1) Under what conditions can one convert from a D to a B?

(2) Under what conditions can one convert from a D** to a B**?
I thought I read somewhere that (2) was not legal, but now I can't
find the reference.

Please reply via email.

Michael