Strange question but I heard it brought up during a discussion and I was very
curious what compiler people think about it.
The question is, instead of using a virtual method table would it be feasible
to use a case statement on the real class type and make a dispatch routine for
each method call?
For example assume “type” is the internal type of the class (where a VTable
would be) and a call to “animal.DoSomething()” is called which would internally
basically be this dispatch table:
case animal.type of
TDog: TDog(animal).DoSomething;
TCat: TCat(animal).DoSomething;
TMouse: TMouse(animal).DoSomething;
end;
The reason this was brought up was because virtual methods can’t be inlined and
this would allow that but I think there would be more overhead overall to have
all these case statements on every virtual method call.
Regards,
Ryan Joseph
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