ostream& operator<<(ostream& s, const QDPExpr<RHS, OScalar<T1> >& l)
StandardOutputStream& operator<<(StandardOutputStream& s, const OScalar<T>& d)
ostream& operator<<(ostream& s, const QDPExpr<RHS, OScalar<T1> >& l){  typedef OScalar<T1> C1;  return s << C1(l);}