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From: nelson@m.cs.uiuc.edu
Newsgroups: comp.lang.c++
Subject: True Virtual / Exceptions
Message-ID: <4800082@m.cs.uiuc.edu>
Date: 23 Jan 90 01:30:50 GMT
Lines: 21
Nf-ID: #N:m.cs.uiuc.edu:4800082:000:913
Nf-From: m.cs.uiuc.edu!nelson    Jan 22 09:26:00 1990


Two questions about "newer" C++:

1.  When using abstract classes, ie with true virtual functions like
	ding dong::dell (foo bar) = 0;
    is a constructor permitted?  "The Evolution of C++" says nothing
    about this, but G++ seems to disallow it on the grounds that you
    are creating an object of that class when the subclasses call
    the constructor.  That is, in a sense, true, but it removes an
    extrememly handy thing.  As a hack, I suppose there could be an
    initialization routine, but...  Does anyone know anything
    further about this???

2.  In the 1987 paper "Possible Directions for C++", Stroustrup 
    mentions an exception handling scheme.  Has anyone or any
    compilers implemented any sort of error-handling scheme.  We
    are about to begin a large C++ project, and nice/varied error
    handling is something that has to be figured out at the start.
    Suggestions?

Danke!