Use class template as a type

ag0aep6g via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Tue Nov 29 01:58:16 PST 2016


On 11/29/2016 02:21 AM, Basile B. wrote:
> The cast from a class type to a sub class in itself does absolutely
> nothing.

That can't be right. A bad downcast gives you null, so it has to check 
the dynamic type information. Compare with upcasts which are statically 
known to be correct, so they don't need to check anything at runtime.


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