Function tuple_for_each

test/test_alignment.cpp:21–29

}
template <typename Tuple, typename Fn>
constexpr decltype(auto) tuple_for_each(Tuple&& tuple, Fn&& fn) {
    using indexes = std::make_index_sequence<
        std::tuple_size<std::decay_t<Tuple>>::value>;

    return tuple_for_each_impl(
        std::forward<Tuple>(tuple),
        indexes {},
        std::forward<Fn>(fn));
}

template <size_t Alignment, typename T>
constexpr T align_value(T value) {