Use class template as a type

[ag0aep6g via Digitalmars-d-learn]

On 11/30/2016 10:42 AM, Bauss wrote:
> Usually casts to base classes can be determined if they're valid at
> compile-time.

Yeah, that's what I said. A cast to a base class is an "upcast". Upcasts 
don't need run-time checks. The other direction (cast to more derived 
class) is a downcast. Downcasts need run-time checks.