[Qt-interest] Library binary compatibility issue

[Esben Mose Hansen]

On Friday 21 May 2010 10:12:11 Giacomo S. wrote:
> A question about binary compatibility issue in a library of mine:

When you override a virtual function, the function itself is virtual. E.g, the 
attached program outputs

        C       B       A
A       1       2       3                                                                                                                                                                     
B       2       3                                                                                                                                                                             
C       3                                                                                                                                                                                     

If B::foo() had been non-virtual, the middle (which is a object of type C 
accessed through a pointer to type B) should have returned 2, not 3.

Thus, the function you want to make virtual is already virtual, if I 
understand you correctly.

Wish I had to time to dig it out of the standard :)


-- 
kind regards, Esben
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