#include <string>
namespace lab2 {
    template<typename T>
    class WeirdCpp {
    public:
        template<typename U> friend std::ostream& operator<<(std::ostream &of,const WeirdCpp<U> &c);

        T nada;
    };
    
    template<typename U> std::ostream &operator<<(std::ostream &of, const WeirdCpp<U> &c){
        of << "apa\n"; //this doesn't work, gives
        //weirdcpp.h:12: error: no match for ‘operator<<’ in ‘of << "apa\012"’
        
        //this works
        of << std::string("apa");
        
        return of;
    }
};