test120.nt

module test120;

interface A { void foo(); }
interface B { void bar(); }
interface C : A, B { }
interface D { void whee(); }
string called;
class Q : C, D {
  void foo() { called = "foo"; }
  void bar() { called = "bar"; }
  void whee() { called = "whee"; }
}

void main() {
  auto q = Object: new Q;
  (D: q).whee();
  assert(called == "whee");
}