fork download
copy 
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. template <unsigned n> class row_base {
  6. 	public: int data[n];
  7. };
  8.  
  9. template <unsigned n, unsigned s> class row_exts : public row_base<s> {
  10. };
  11.  
  12. template <unsigned s> class row_exts <1,s> : public row_base<s> {
  13. 	public: int &x(void) {
  14. 		return this->data[0];
  15. 	}
  16. };
  17.  
  18. template <unsigned s> class row_exts <2,s> : public row_exts<1,s> {
  19. 	public: int &y(void) {
  20. 		return this->data[1];
  21. 	}
  22. };
  23.  
  24. template <unsigned n> class row : public row_exts<n,n> {};
  25.  
  26. int main() {
  27. 	row <2> a;
  28.  
  29. 	a.x() = 42;
  30. 	a.y() = -1;
  31. 	cout << a.x() << ' ' << a.y();
  32.  
  33. 	return 0;
  34. }
Success #stdin #stdout 0s 3412KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
42 -1
https://ideone.com/xiPCph
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!