object model

[SainTiss <saintiss gmx net>]

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Hi,

I've got a quite general question here:

I've noticed that inheritance is simulated by having an instance of the 
superclass as the first member...
But is there something like a checked type cast? i.e. where you'd get NULL if 
the pointer isn't of the right type or something? (an equivalent of 
dynamic_cast in C++ I mean)...

Also, I'm guessing there's something like polymorphism too... Is all this just 
written from scratch for Dia, or is this all part of a certain object model, 
like GObject? I'd think so, but then again it seems like Object doesn't 
inherit from GObject, so I'm a bit confused...

Thanks,

Hans

- -- 
Ark Linux - Linux for the Masses (http://arklinux.org)

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Hans Schippers
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UA 2003-2004
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