1  // C++20 headers
       2  #if __cplusplus > 201703
       3  #include <version>
       4  #include <barrier>
       5  #include <bit>
       6  #include <compare>
       7  #include <concepts>
       8  #if __cpp_coroutines
       9  #include <coroutine>
      10  #endif
      11  #include <latch>
      12  #include <numbers>
      13  #include <semaphore>
      14  #include <source_location>
      15  #include <span>
      16  #include <stop_token>
      17  #include <syncstream>
      18  #if 0
      19  // Unimplemented
      20  #include <format>
      21  #endif
      22  #endif