Class info on interfaces

[Adam D. Ruppe via Digitalmars-d-learn]

On Wednesday, 26 August 2015 at 18:53:19 UTC, Jacob Carlborg 
wrote:
> Is that intentional? Perhaps because of COM and C++ interfaces?

Yes, exactly. COM and C++ things won't necessarily have a D 
TypeInfo available and since interfaces can be them, it can't be 
sure.

What I do there is to just cast the interface to Object. Then you 
should check for null to cover those cases, then you can typeid 
or classinfo it.