Should this always work?

[Mike Parker]

On Saturday, 1 May 2021 at 15:21:28 UTC, frame wrote:
>
> btw: why is it even allowed to create an instance via cast as 
> an abstract thing?

No instance is being created by the cast. The instance already 
exists. The cast just allows you to treat the pointer to the 
instance as a specific type. It’s no different than casting from 
C to A really. You just have the void* as an intermediary.