::for_each_element

#include <functional>
#include <tuple>
#include <type_traits>
#include <utility>

namespace details {

  template<typename Tuple, typename Callable, std::size_t... Indexes>
  void for_each_element(Tuple&& tuple, Callable&& callable, std::index_sequence<Indexes...>) {

    (std::invoke(std::forward<Callable>(callable), std::get<Indexes>(std::forward<Tuple>(tuple))), ...);

  }

}

template<typename Tuple, typename Callable>
void for_each_element(Tuple&& tuple, Callable&& callable) {

  using index_sequence = std::make_index_sequence<std::tuple_size<std::decay_t<Tuple>>::value>;
  details::for_each_element(std::forward<Tuple>(tuple), std::forward<Callable>(callable), index_sequence{});

}