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  1. #include <iostream>
  2. #include <type_traits>
  3. using namespace std;
  4.  
  5. class Figure {
  6. 	public:
  7. 		virtual void print() const = 0;
  8. };
  9.  
  10. class Circle : public Figure {
  11. 	public:
  12. 		void print() const override {
  13. 			cout << "Circle" << endl;
  14. 		}
  15. };
  16.  
  17. class Triangle : public Figure {
  18. 	public:
  19. 		void print() const override {
  20. 			cout << "Triangle" << endl;
  21. 		}
  22. };
  23.  
  24. template <typename T>
  25. void log(const T &figure) {
  26. 	static_assert(std::is_base_of<Figure, T>::value,
  27. 		"It has to be a Figure");
  28.  
  29.     figure.print();
  30. }
  31.  
  32. int main() {
  33. 	Circle circle;
  34. 	Triangle triangle;
  35.  
  36. 	log(circle);
  37. 	log(triangle);
  38.  
  39. 	return 0;
  40. }
Success #stdin #stdout 0s 3140KB
comments (?)
stdin 
Standard input is empty
stdout 
Circle
Triangle
https://ideone.com/bvcSQY
Static dispatch
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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