On Friday, 9 August 2019 at 13:19:14 UTC, kinke wrote:
On Friday, 9 August 2019 at 12:26:59 UTC, John Colvin wrote:
Why is there no "hi" between 0 and 1?
Because you are treating the unadjusted object pointer as
interface pointer and then call the only virtual function of
that interface, in the 2nd vtbl slot (after the TypeInfo ptr).
Casting a class ref to an interface offsets the pointer, so
that the interface ref points to the interface vptr for that
object instance. This is missing in that line, and so you are
invoking the first virtual function of class C, which is some
base function in `Object`.
Ok, makes sense, thanks.
