observable_never

Never emits and never unsubscribes, only once it’s dropped!

Warning: You will be responsible to unsubscribe from subscriptions made to this observable, as it will never do so on its own!

See Also

• CreateObservable - Define your own function that will interact with the subscriber!
• DeferredObservable - Subscribes to an observable returned by a function.
• JustObservable - Immediately emits a single value!
• EmptyObservable - Immediately completes!
• ThrowObservable - Immediately errors!
• ClosedObservable - Immediately unsubscribes!

Example

cargo run -p rx_core --example observable_never_example

let _subscription = never().subscribe(PrintObserver::new("never"));
println!("nothing happens before dropping the subscription!");

Output:

nothing happens before dropping the subscription!
never - unsubscribed