Is the vtable only used for virtual function lookups, or does it get used for normal member function lookups as well?
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Is the vtable only used for virtual function lookups, or does it get used for normal member function lookups as well?
Technically, this is an implementation detail. The C++ standard says nothing about vtables or vptrs.
But typically, a compiler will only choose to use the vtable/vptr mechanism when a member function is being called in a polymorphic sense (i.e. via a pointer/referene to base class). If it knows at compile-time what to do, then there’s no need for the indirection.