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  1. template <typename T>
  2. class LoopTemplate {
  3. 	T max, cnt;
  4. public:
  5. 	LoopTemplate(T max) : max(max), cnt(0) {}
  6. 	LoopTemplate(T min, T max) : max(max), cnt(min) {}
  7. 	LoopTemplate& begin() {
  8. 		return *this;
  9. 	}
  10. 	LoopTemplate& operator++() {
  11. 		cnt++;
  12. 		return *this;
  13. 	}
  14. 	T& operator*() {
  15. 		return cnt;
  16. 	}
  17. 	bool operator!=(LoopTemplate&) {
  18. 		return cnt < max;
  19. 	}
  20. 	LoopTemplate& end() {
  21. 		return *this;
  22. 	}
  23. };
  24. typedef LoopTemplate<long> Loop;
  25. LoopTemplate<unsigned long long> operator "" _(unsigned long long n)
  26. {
  27. 	return LoopTemplate<unsigned long long>(n);
  28. }
  29.  
  30.  
  31. /* Exapmle usage */
  32. #include <iostream>
  33.  
  34. void f(unsigned long long i)
  35. {
  36. 	std::cout << i << std::endl;
  37. }
  38.  
  39. int main()
  40. {
  41. 	for (auto&& i : 10_) {
  42. 		f(i);
  43. 	}
  44.  
  45.     int x  = 3;
  46.     for (auto&& i : Loop(x)) {
  47.         f(i);
  48.     }
  49.  
  50. 	return 0;
  51. }
  52.  
Success #stdin #stdout 0s 3456KB
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https://ideone.com/n9zYGV
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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