79 d1::task* task_ptr_or_nullptr(F&& f);
88     d1::task* execute(d1::execution_data& ed) override {  in execute()
90         task* res = task_ptr_or_nullptr(m_func);  in execute()
94     d1::task* cancel(d1::execution_data& ed) override {  in cancel()
108     d1::task* task_ptr_or_nullptr_impl(std::false_type, F&& f){  in task_ptr_or_nullptr_impl()
114     d1::task* task_ptr_or_nullptr_impl(std::true_type, F&& f){  in task_ptr_or_nullptr_impl()
120     d1::task* task_ptr_or_nullptr(F&& f){  in task_ptr_or_nullptr()
131     d1::task* task_ptr_or_nullptr(F&& f){  in task_ptr_or_nullptr()
435 class function_task : public task {
451     task* execute(execution_data& ed) override {  in execute()
452         task* res = d2::task_ptr_or_nullptr(m_func);  in execute()
456     task* cancel(execution_data& ed) override {  in cancel()
473 class function_stack_task : public task {
480     task* execute(execution_data&) override {  in execute()
481         task* res = d2::task_ptr_or_nullptr(m_func);  in execute()
485     task* cancel(execution_data&) override {  in cancel()
531     task* prepare_task(F&& f) {  in prepare_task()
633     task* task_to_spawn;
640     spawn_delegate(task* a_task, task_group_context& ctx)  in spawn_delegate()