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  1. #include <iostream>
  2. #include <tuple>
  3. #include <utility>
  4.  
  5. namespace detail {
  6.     template <typename F, typename TUPLE, std::size_t ... Is>
  7.     void run_for_each(F&& f, TUPLE&& t, std::index_sequence<Is...>)
  8.     {
  9.         const int dummy[] = {0, (f(std::get<Is>(std::forward<TUPLE>(t))), void(), 0)...};
  10.         static_cast<void>(dummy); // Avoid warning for unused variable
  11.     }
  12. }
  13.  
  14. template <typename F, typename TUPLE>
  15. void run_for_each(F&& f, TUPLE&& t)
  16. {
  17.      detail::run_for_each(std::forward<F>(f),
  18.                           std::forward<TUPLE>(t),
  19.                           std::make_index_sequence<std::tuple_size<std::decay_t<TUPLE>>::value>());
  20. }
  21.  
  22. int main() {
  23.     auto t = std::make_tuple(std::less<int>{}, std::greater<int>{});
  24.  
  25.     run_for_each([](auto&&f) {std::cout << f(0, 1) << " ";}, t);
  26.     std::cout << std::endl;
  27. }
  28.  
Success #stdin #stdout 0s 3468KB
comments (?)
stdin 
Standard input is empty
stdout 
1 0
https://ideone.com/7qBmzn
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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