Method enqueue

include/exec/tbb/tbb_thread_pool.hpp:56–59

    }

    void enqueue(exec::_pool_::task_base* task, std::uint32_t tid = 0) noexcept
    {
      arena_.enqueue([task, tid] { task->execute_(task, /*tid=*/tid); });
    }

    ::tbb::task_arena arena_{::tbb::task_arena::attach{}};
  };