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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct clear_line { } cls;
  5.  
  6. class out {
  7. private:
  8. 	std::ostream &strm = std::cout;
  9. 	bool is_next_clear = false;
  10. public:
  11.     template <typename T>
  12. 	out& operator<<(const T& obj) {
  13. 		if(is_next_clear) {
  14. 			strm << std::endl << std::endl << std::endl; // clear logic
  15. 			is_next_clear = false;
  16. 		}
  17.  
  18. 		strm << obj;
  19. 		return *this;
  20. 	}
  21.  
  22. 	out& operator<<(const clear_line& _) {
  23. 		is_next_clear = true;
  24. 		return *this;
  25. 	}
  26.  
  27. 	// this is the type of std::cout
  28.     typedef std::basic_ostream<char, std::char_traits<char> > CoutType;
  29.  
  30.     // this is the function signature of std::endl
  31.     typedef CoutType& (*StandardEndLine)(CoutType&);
  32.  
  33.     // define an operator<< to take in std::endl
  34.     out& operator<<(StandardEndLine manip)
  35.     {
  36.         // call the function, but we cannot return its value
  37.         manip(strm);
  38.  
  39.         return *this;
  40.     }
  41. };
  42.  
  43. int main() {
  44. 	out o;
  45. 	o << "Some real output" << std::endl << "More..." << cls;
  46. 	o << "Some other real output";
  47.  
  48. 	return 0;
  49. }
Success #stdin #stdout 0s 4652KB
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stdin
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Standard input is empty
stdout
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Some real output
More...


Some other real output
https://ideone.com/ACUMOo
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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