89 TBB_EXPORT bool __TBB_EXPORTED_FUNC attach(d1::task_arena_base&);
291     struct attach {};  struct
294     explicit task_arena( attach )  in task_arena()  argument
297         if (r1::attach(*this)) {  in task_arena()
303     explicit task_arena(d1::attach)  in task_arena()  argument
304         : task_arena(attach{})  in task_arena()
345     void initialize(attach) {  in initialize()  argument
349             if ( !r1::attach(*this) ) {  in initialize()
357     void initialize(d1::attach) {  in initialize()  argument
358         initialize(attach{});  in initialize()
482 using detail::d1::attach;