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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. using namespace std;
  5.  
  6. template<size_t depth, typename Func, typename... Args>
  7. auto deep(Func foo, Args&&... args)
  8. {
  9.     if constexpr(depth != 0)
  10.     {
  11.         return foo(deep<depth-1>(foo, std::forward<Args>(args)...));
  12.     }
  13.     else
  14.         return foo(std::forward<Args>(args)...);
  15. }
  16.  
  17. double Cos(double x) { return cos(x); }
  18.  
  19. int main(int argc, char * argv[])
  20. {
  21.     cout << deep<100>(Cos,0.0);
  22. }
  23.  
Success #stdin #stdout 0s 5424KB
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Standard input is empty
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0.739085
https://ideone.com/SqFOPl
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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