If I cancel an entire coroutineScope, will launches still be accepted with the same scope? I'm tryin...

# coroutines

[colintheshots]

If I cancel an entire coroutineScope, will launches still be accepted with the same scope? I'm trying to resolve a debate.

[octylFractal]

no, they will all be cancelled

[colintheshots]

So all future work will be cancelled?

[octylFractal]

correct

[octylFractal]

if you want to have this functionality, you can create a scope with a SupervisorJob() and cancel all the children of the job instead

[colintheshots]

I think I do want the actual behavior. I just wasn't sure about it.

[colintheshots]

Thank you!

[octylFractal]

you can check yourself with:

suspend fun main() {
    val scope = CoroutineScope(Job())
    scope.launch {
        println("Yes, this runs!")
    }.join()
    scope.cancel()
    scope.launch {
        println("No, this won't run!")
    }.join()
    println("Finished.")
}

gives

Yes, this runs!
Finished.

[octylFractal]

and the alternative:

suspend fun main() {
    val scope = CoroutineScope(SupervisorJob())
    scope.launch {
        println("Yes, this runs!")
    }.join()
    scope.coroutineContext[Job]!!.children.forEach { it.cancel() }
    scope.launch {
        println("Yes, this runs too!")
    }.join()
    println("Finished.")
}

gives

Yes, this runs!
Yes, this runs too!
Finished.

[octylFractal]

ah, in fact you don't even need SupervisorJob() here -- cancellation of parent only occurs with an exception, not when cancelling normally via cancel()