33 Execution control library [exec]

33.13 Coroutine utilities [exec.coro.util]

task(task&& other) noexcept;

Effects: Initializes handle with exchange(other.handle, {}).

~task();

Effects: Equivalent to: if (handle) handle.destroy();

template<class Self, class... Env>
  static consteval auto get_completion_signatures();

Let the type C be a specialization of execution::completion_signatures with the template arguments (in unspecified order):

(3.1)
set_value_t() if T is void, and set_value_t(T) otherwise;
(3.2)
template arguments of the specialization of execution::completion_signatures denoted by error_types; and
(3.3)
set_stopped_t().

Returns: C().

template<receiver Rcvr>
  state<Rcvr> connect(Rcvr&& recv) &&;

Preconditions: bool(handle) is true.

Effects: Equivalent to: return state<Rcvr>(exchange(handle, {}), std::forward<Rcvr>(recv));