Derived: test the 'derived' pointcut function:
==============================================
  void C1::f(double)
----------------------------------------------
  void C1::f()
----------------------------------------------
  before derived("C2")
  before derived("% C2::f(double)")
  void C2::f(double)
----------------------------------------------
  before derived("C2")
  void C3::f()
----------------------------------------------
  before derived("C2")
  before derived("% C2::f(X&)")
  void C3::f(X&)
----------------------------------------------
  before derived("C2")
  void C3::x()
==============================================