Method operation

include/exec/static_thread_pool.hpp:1728–1733

       public:
        operation(Range range, _static_thread_pool& pool, Receiver rcvr)
          : operation_base_with_receiver<Range, Receiver>{std::move(range),
                                                          pool,
                                                          static_cast<Receiver&&>(rcvr)}
          , items_(std::ranges::size(this->range_), item_allocator_t(get_allocator(this->rcvr_)))
        {}

        ~operation()
        {