In part 1 of this mini-series, we looked at the basics of iterating over a std::tuple using index_sequence and fold expressions. In part 2, we simplified things with std::apply and even created helpers like for_each_tuple and transform_tuple. So far, we used C++ features up to C++20/23… but now, in C++26, we finally get language-level tools that make tuple iteration straightforward and expressive.
