Polymorphic Finalizer, to be or not to be?

wuping · January 20, 2020, 1:02pm

The document says " Finalizers do not participate in Polymorphism, and cannot have Virtuality Modifiers." Then why in Island platform source code FileStream.pas, I saw this Finalizer with override modifier?

ck · January 20, 2020, 1:36pm

Because they’re implied to be virtual/override. The compiler adds that for you (and forces the inherited call). The requirement here is that all finalizers end up calling their base method.

wuping · January 20, 2020, 1:37pm

@ck
I am not sure if I understand your point correctly, but the following code ONLY has Child.Finalizer get called. Parent.Finalizer is not called? Did I miss anything?
FinalizerTest.7z (4.4 KB)

RemObjectsSoftware · January 20, 2020, 2:31pm

Thanks, logged as bugs://83811

ck · January 20, 2020, 2:31pm

That’s very odd. The generated code looks perfectly fine, yet i see it doesn’t hit the first. Fixed.

RemObjectsSoftware · January 20, 2020, 2:36pm

bugs://83811 got closed with status fixed.