c++ for each item in tuple code example

Example 1: iterator on std::tuple

#include <tuple>
#include <iostream>

int main()
{
    std::tuple t{42, 'a', 4.2}; // Another C++17 feature: class template argument deduction
    std::apply([](auto&&... args) {((std::cout << args << '\n'), ...);}, t);
}

Example 2: iterator on std::tuple

std::apply([](auto ...x){std::make_tuple(x.do_something()...);} , the_tuple);