D pointers #2

Thiago Macieira thiago at kde.org
Thu Oct 20 06:27:30 BST 2005

Maks Orlovich wrote:
>It outputs A, B, C. If virtuals didn't work, it would output A, A, A.
>In fact, virtuals very much work inside the constructor --- except that
> when you're in a constructor of a superclass, your class -is- the
> superclass.

Right. But the point is: people expect it to output C, C, C, because it's 
the virtual function "virt" that is called. I remember a certain job 
interview asking exactly that, recently :-)

From the technical point of view, a call to a virtual function from inside 
the constructor or destructor is no different than a call to a 
non-virtual one: it doesn't go through the virtual table.

  Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
    PGP/GPG: 0x6EF45358; fingerprint:
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5. Swa he géanhwearf tó timbran, and hwonne he cóm, lá! Unix cwæð "Hello, 
World". Ǽfre ǽghwilc wæs glæd and seo woruld wæs fréo.
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