Function FormatLine

13-Multithreading/code/barrier_example.cpp:7–13

#include <print>

auto FormatLine(auto&& view)
{
    return view | std::views::transform([](auto num) {
              return std::format("{}", num);
           }) | std::views::join_with('\t')
              | std::ranges::to<std::string>();
}

std::vector<int> results(9);
std::barrier barrier{ 9, []() noexcept {