interface I {
        final int foo(I other, int a, int b) {
                return other.foo(a,b) + a*b;
        }
        int foo(int a, int b);
}

class A : I {
        int foo(int a, int b) {
                return a*b;
        }
}

void main() {
        A a = new A;

        a.foo(5,5);
        a.I.foo(a, 5,5);
        a.foo(a, 5,5); //line 22
}
---------
$ rdmd interface_final_test
interface_final_test.d(22): Error: function interface_final_test.A.foo (int a, int b) is not callable using argument types (A,int,int) interface_final_test.d(22): Error: expected 2 arguments, not 3 for non-variadic function type int(int a, int b)
---------


Why do I need to write a.I.foo instead of a.foo to call the final method of the interface ?

Thank you, Joshua

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