Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ncar!boulder!stan!garya
From: garya@Solbourne.COM (Gary Aitken)
Newsgroups: comp.lang.c++
Subject: Re ptr to member function, even worse
Message-ID: <1015@garya.Solbourne.COM>
Date: 8 May 89 14:50:35 GMT
Organization: Solbourne Computer Inc., Longmont, Co.
Lines: 18

> at this time you knew
> *exactly* what type it was and what its VF set was.

The problem is, "I" didn't create the object.  The dispatch code is
deep inside an X window system toolkit, compiled separately and made into
a library.  The function is a member function for either a toolkit object,
in which case I would know more, or a user application program object, in
which case I know absolutely nothing.  I don't know the difference, and it
doesn't matter, since even if I did, the application program objects are
still totally undefined.  The only thing I know is that it is
a member function; the only way I know that is I have a non-null object ptr.
(The dispatch mechanism allows for calling non member functions as well, but
that's easy.).
-- 
Gary Aitken

Solbourne Computer Inc.    ARPA: garya@Solbourne.COM
Longmont, CO               UUCP: ...!{boulder,sun}!stan!garya