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  1. #include <cstdio>
  2.  
  3. struct Heavy
  4. {
  5.     Heavy() { printf("h "); }
  6.     Heavy(const Heavy&) { printf("H "); }
  7. };
  8.  
  9. template<int N, class... Args> struct getter;
  10. template<class A, class... Args> struct getter<0,A,Args...>
  11. {
  12.     typedef A type;
  13.     static type get(A a, Args...) { printf("0 "); return a; }
  14. };
  15. template<int N, class A, class... Args> struct getter<N,A,Args...>
  16. {
  17.     typedef getter<N-1,Args...> base;
  18.     typedef typename base::type type;
  19.     static type get(A a, Args... args) { printf("%d ", N); return base::get(args...); }
  20. };
  21.  
  22. template<int N, class... Args>
  23. typename getter<N,Args...>::type
  24. get(Args... args) { printf("go "); return getter<N,Args...>::get(args...); }
  25.  
  26. int main()
  27. {
  28.     get<4>(0,1,2,3,4, Heavy(), 6,7,8,9);
  29.     printf("\n");
  30.     get<5>(0,1,2,3,4, Heavy(), 6,7,8,9);
  31.     printf("\n");
  32.     get<9>(0,1,2,3,4, Heavy(), 6,7,8,9);
  33.     printf("\n");
  34. }
  35.  
Success #stdin #stdout 0s 3340KB
comments (?)
stdin 
Standard input is empty
stdout 
h go H 4 H 3 H 2 H 1 H 0 
h go H 5 H 4 H 3 H 2 H 1 H 0 H 
h go H 9 H 8 H 7 H 6 H 5 H 4 3 2 1 0
https://ideone.com/NNSX5W
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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