English
- #ifndef __null2_hh__
- #define __null2_hh__
- #include "null1.hh"
- template <class Type, class Behavior>
- inline ostream& operator << (ostream &o, const Null<Type,Behavior> &n) {
- if (n.is_null) return Behavior::null_ostr(o);
- else return o << n.data;
- }
- #endif
