Re: Virtual inheritace -- when one inheritance of the base is virtual and the other isn't.

From:

"Alf P. Steinbach" <alfps@start.no>

Newsgroups:

comp.lang.c++

Date:

Sat, 14 Mar 2009 16:45:59 +0100

Message-ID:

<gpgjfp$m86$1@news.motzarella.org>

* pauldepstein@att.net:
[snip]

                          Base
                          / \
                         / \
                virtual / \ virtual
                     Der1 Der2
                        \ /
                         \ /
                          \ /
                          Join

END QUOTE

What would happen if a programmer (by mistake, for example) made the
inheritance of Der2 non-virtual but kept the inheritance of Der1
virtual:

class Der2 : public Base {
public:
   ...
};

Then Der2 has one Base sub-object, and Der1 has another. The virtually
inheriting classes share one single Base sub-object. The others don't.

Cheers & hth.,

- Alf

PS: Please post with Latin-1 character set, or UTF-8. Cause' when it's Japanese
or Chinese my Thunderbird chooses a font that's very hard on the eyes. And I'm
too lazy to fix that, which I presume would involve delving around in a
spaghetti mess of options.

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