vptr – Tarik Billa

Virtual dispatch implementation details

June 15, 2023 by Tarik

1. Do I have any errors in the above description? All good. 🙂 2. How does the compiler know f’s position in vtable Each vendor will have their own way of doing this, but I always think of the vtable as map of the member function signature to memory offset. So the compiler just maintains … Read more

Alternative virtual function calls implementations?

May 13, 2023 by Tarik

It is not true that vtable pointers in objects are always the most efficient. My compiler for another language used to use in-object pointers for similar reasons but no longer does: instead it uses a separate data structure which maps the object address to the required meta-data: in my system this happens to be shape … Read more

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