C++ its own insane behavior, where default arguments are determined at the call site instead of at runtime. This means your function can get another function's

C++ its own insane behavior, where default arguments are determined at the call site instead of at runtime. This means your function can get another function's default arguments. #include <iostream> struct Base { virtual void foo(const char *name = "base") { std::cout << "Base impl with " << name << " param\n"; } }; struct Derived : public Base { virtual void foo(const char *name = "derived") override { std::cout << "Derived impl with " << name << " param\n"; }; }; int main(void) { Base *b = new Derived(); b->foo(); } prints "Derived impl with base param" Fortunately Python avoided that bit of silliness.