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  1. #include <iostream>
  2. #include <tuple>
  3. using namespace std;
  4.  
  5. template<class Func, size_t index>
  6. class ForwardsApplicator{
  7. public:
  8. 	template<class ...Components>
  9.     void operator()(Func func, const std::tuple<Components...>& t){
  10.         ForwardsApplicator<Func, index - 1>()(func, t);
  11.         func(std::get<index - 1>(t));
  12.     }
  13. };
  14.  
  15. template<class Func>
  16. class ForwardsApplicator<Func, 0> {
  17. public:
  18. 	template<class ...Components>
  19.     void operator()(Func func, const std::tuple<Components...>& t){}
  20. };
  21.  
  22. template<class Func, class ...Components>
  23. void apply(Func func, const std::tuple<Components...>& t) {
  24. 	ForwardsApplicator<Func, sizeof...(Components)>()(func, t);
  25. }
  26.  
  27.  
  28.  
  29. class Lambda{
  30. public: 
  31.    template<class T>
  32.    void operator()(T arg){ std::cout << arg << "; "; }
  33. };
  34.  
  35. int main() {
  36.     apply(Lambda{}, std::make_tuple(1, 2.0f));
  37. }
  38.  
Success #stdin #stdout 0s 3096KB
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1; 2;
https://ideone.com/F4dTUC
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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