Hi! I want to wrap my player callback into suspend...

# coroutines

[Oleh Havrysh]

Hi!
I want to wrap my player callback into suspend function that will just suspend until something completed without returning any value.
Is there some alternative for suspendCoroutine that doesn’t require passing result value?

-.kt

[Oleh Havrysh]

I can rewrite it as

private suspend fun waitForPlayerOpen() {
        suspendCoroutine<Unit> {
            player.addOpenListener {
                it.resume(Unit) //what if I don't need to return value?    
            }
        }
    }

But it still looks as workaround, isn’t it?

[gildor]

Pass Unit

[gildor]

it’s not a workaround, it’s exactly how it should work for functions that return Unit (which is any function “without returning any value.“, just language allows you to omit return type if it’s Unit

[Oleh Havrysh]

Great, thank you!

[Melih Aksoy]

How about it.resumeWith(Result.success) ? It’s still a return value but more meaningful.

[Oleh Havrysh]

success is also function that takes value and wraps it into Result, so I need to write it.resumeWith(Result.success(Unit)). It almost the same as previous variant

[gildor]

It almost the same as previous variant

It’s exactly the same, function resume is juste extension function that wraps object to Result.success

[Melih Aksoy]

Ah you’re right