Method enqueue

include/exec/thread_pool_base.hpp:295–298

        using shared_state = bulk_shared_state<CvSender, Receiver, Shape, Fun, MayThrow>;

        void enqueue() noexcept
        {
          shared_state_.pool_.bulk_enqueue(&shared_state_, shared_state_.num_agents_required());
        }

        template <class... As>
        void set_value(As&&... as) noexcept