Use class template as a type

[Basile B. via Digitalmars-d-learn]

On Wednesday, 30 November 2016 at 14:53:21 UTC, ag0aep6g wrote:
> 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.

Actually I've always called an "upcast" a "downcast" ! This 
incredible misconception explains why you had to correct me after 
my yesterday's answer.