printable.h

#pragma once
 
#include <string>
 
namespace smlt {
 
class Printable {
public:
    virtual ~Printable() {}
 
    virtual std::string repr() const = 0;
 
    friend std::ostream& operator<< (std::ostream& o, Printable const& instance);
};
 
std::ostream& operator<< (std::ostream& o, Printable const& instance);
 
 
}