T *operator -> () const;

  T *operator -> () const;

  T *operator -> ();

  T *operator -> ();

  const T &operator * () const;

  const T &operator * () const;

  // allow if (!sp)

  // allow if (!sp)

  bool operator! ();

  bool operator! ();

  // allow if (sp)

  // allow if (sp)

}

}

template <typename T>

template <typename T>

Ptr<T>::operator * ()

Ptr<T>::operator * ()

{

{

  return *m_ptr;

  return *m_ptr;