Re: How disable compiler dynamic_cast optimization?

[Simon Buchan]

Chris Shearer Cooper wrote:
> I am pretty sure that doesn't work ... it won't dynamic cast from something 
> that isn't an object 'cuz if it doesn't optimize it away, it does it using a 
> virtual function at run-time ...
How about:
A* ap = ...;
void* vp = reinterpret_cast<void*>(ap);
D* dp = dynamic_cast<A*>(reinterpret_cast<A*>(vp));

If the compiler optimises that away, I'm not only impressed, I'm 
confused as to why it would.
Consider whether there is a simpler way to do what you /really/ want to 
do.  (If you are doing stuff like this, there almost always is.)