Path: utzoo!attcan!uunet!ginosko!uakari.primate.wisc.edu!ctrsol!cica!iuvax!rutgers!att!cbnewsl!dog From: dog@cbnewsl.ATT.COM (edward.n.schiebel) Newsgroups: comp.lang.c++ Subject: Re: ->* and type info for virtual functions Message-ID: <2016@cbnewsl.ATT.COM> Date: 27 Sep 89 11:49:42 GMT References: <536@atcmpe.atcmp.nl> Organization: AT&T Bell Laboratories Lines: 17 From article <536@atcmpe.atcmp.nl>, by leo@atcmp.nl (Leo Willems): > In the following program a class object its address is put in to a void pointer. > After restoring this pointer into a pointer of the base class, typeinfo seems to > be restored: This will not necessarily be the case, and definitely not with multiple inheritence. When a derived object is being passed around as a pointer to a one of its base classes, that pointer's value is not necessarily == to the address of the derived object. If you take the base*, cast it to a void*, then cast it back to a derived*, you will definitly have problems ( I have been bitten by this :-). Ed Schiebel AT&T Bell Laboratories dog@vilya.att.com