Re: [GD-General] Overhead of RTTI

[Mickael P. <gd...@dr...>]

Hmm I hope you meant reinterpret_cast, otherwise I'd understand why you n=
eed
RTTI in order to make things work.

----- Original Message -----
From: "Adrian Cearn=E3u" <ce...@ce...>
To: <gam...@li...>
Sent: Thursday, December 26, 2002 6:34 PM
Subject: RE: [GD-General] Overhead of RTTI


> 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 =3D Override (the "IS A" relationship).
> Object To Interface inheritance =3D Implementation.
> Interface To Interface inheritance =3D Expansion.
> (of course there is never any Interface To Object inheritance).
>
>
>
> Nicolas
>
>
>
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