[boost] Re: summary of casts.hpp suggestions

From: Valentin Bonnard (Bonnard.V_at_[hidden])
Date: 1999-09-20 10:55:46

Darin Adler wrote:

>     - polymorphic_downcast allows incorrect casts that arise in presence of
> multiple inheritance
>     + change implementation to use stronger assert

I don't how this could happen: if there is more than 
one base class, the dynamic_cast will fail.

If it's a side-way cast (Base1 to Base2), the static_cast 
won't compile.

Do you have a proof, a justification, an 
explanation, or an example ?

>     - want cast that works like static_cast<>, but only for casting from
> void* since that's a common reason to use it

Well, void* to X* conversion is just another 
THIS-IS-REALLY-A<X>, which is generally done 
by static_cast.

-- 
Valentin Bonnard