RE: [GD-General] Overhead of RTTI

[<ce...@ce...>]

Okay, but does any of you know what other overhead will RTTI introduce
if dynamic_cast will be used strictly when static_cast won't work (like
when having to do with MI)? Maybe a structure size overhead, but how
big?

Thanks,
Adrian

-----Original Message-----
From: gam...@li...
[mailto:gam...@li...] On Behalf Of
Nicolas Romantzoff
Sent: Tuesday, December 24, 2002 6:47 PM
To: gam...@li...
Subject: RE: [GD-General] Overhead of RTTI



> > Objects should inherit at most ONE object, and implement as many 
> > interfaces as needed. Interfaces should expend at most ONE 
> interface.
> 
> Can you explain more carefully? I didn't really understand 
> the second rule.
> 

That second rule is just to say that you never need MI at interface
level.
Just define separate interfaces.
I'm even wondering if one would need inheritance for interfaces at all
(apart from a "root" interface like the COM's IUnknown).

Objects on the opposite do need MI for interface implementation.

Here, we are trying to use different words for inheritance:
Object To Object inheritance = Override (the "IS A" relationship).
Object To Interface inheritance = Implementation.
Interface To Interface inheritance = Expansion.
(of course there is never any Interface To Object inheritance).



Nicolas



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