Re: Multiple Inheritance

[mcsun!sun4nl!cwi.nl!guido@uunet.uu.net (Guido van Rossum)]

bs@alice.att.com (Bjarne Stroustrup) writes:

>MI in C++ and elsewhere isn't perfect and it isn't a panacea, but it works
>and it makes some styles of programming noticeably more convenient and
>less obscure. Naturally, it can also be overused and misused, but basically
>it works.

Point taken.  However, I still worry about MI.  When MI is *not* used,
it still imposes an overhead -- there is a "delta" offset in the vtbl
that is added to "this" each time a virtual function is called, but
this delta can only ever be nonzero when MI is used.  I feel that this
is in direct conflict with the C++ philosophy that language features
you don't use shouldn't cause overhead.

I am also still looking for examples of the styles of programming that
are aided by MI -- anyone got pointers?

--Guido van Rossum, CWI, Amsterdam <guido@cwi.nl>
"You can't do that in horizontal mode."