mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard Smith
c33fb9fc48
For now, hide `override fn`s from name lookup, so that the base class version is always used, as the derived-class version does not have its own vptr entry and so would not do the right thing if a further-derived class adds a new override. This is implemented via a new access kind of `Hidden`. When checking the overriding function, pass in the expected `Self` type and check the `self` parameter against that; the signature that we generate for the thunk in the derived class is the base class signature with the `self` parameter's type changed to the derived class. When we generate a thunk for a virtual function, the thunk is assigned a `virtual_index`, and the virtual function itself is not. When the thunk makes a direct call to the virtual function, recognize this situation by checking for a `virtual_index`, and perform a non-virtual call if there isn't one. Assisted-by: Gemini via Antigravity