[gmpi] Re: C++ detail question

On Wed, Mar 02, 2005 at 02:58:30PM -0500, Paul Davis wrote:
> >How does C++ lay out a CFoo instance?  Is the very first element the 'a'
> >member of Foo or is it a pointer to the virtual function table?
> 
> its guaranteed to be C compatible, which leads to the data elements
> coming first.

OK, so second question.  If I cast a "struct Foo *" to a "class CFoo *",
what happens?  Can I use non-virtual methods on it?  Can I use virtual
methods on it?

Obviously, I could not access any data members that are part of CFoo but
not Foo, right?

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