std :: async::sync
Struct std::Cancellable
'inner' until it finishes or 'token' is cancelled, whichever is first; on cancellation 'inner' is dropped. Output: ?T, null if cancelled.
std :: async::sync
'inner' until it finishes or 'token' is cancelled, whichever is first; on cancellation 'inner' is dropped. Output: ?T, null if cancelled.