240 class task_arena : public task_arena_base {
261     task_arena(int max_concurrency_ = automatic, unsigned reserved_for_masters = 1,
268     task_arena(const constraints& constraints_, unsigned reserved_for_masters = 1,
274     task_arena(const task_arena &s) // copy settings but not the reference or instance  in task_arena()  function
285     task_arena(const task_arena& a) // copy settings but not the reference or instance  in task_arena()  function
294     explicit task_arena( attach )  in task_arena()  function
303     explicit task_arena(d1::attach)  in task_arena()  function
304         : task_arena(attach{})  in task_arena()
372     ~task_arena() {  in ~task_arena()
435     friend void submit(task& t, task_arena& ta, task_group_context& ctx, bool as_critical) {  in submit()
481 using detail::d1::task_arena;