1 #[cfg(feature = "std")] main()2fn main() { 3 let (sender, receiver) = oneshot::channel(); 4 assert!(sender.send(19i128).is_ok()); 5 assert_eq!(receiver.recv(), Ok(19i128)); 6 } 7 8 #[cfg(not(feature = "std"))] main()9fn main() { 10 panic!("This example is only for when the \"sync\" feature is used"); 11 } 12