I have a suspend fun that for some reason returns ...

# coroutines

[Loránd]

I have a suspend fun that for some reason returns Kotlin.Unit when it is done and not the type i expected it to return, anyone had this problem before?

[Dominaezzz]

What type were you expecting?

[Loránd]

I was expecting a list of models which i fetch from a database

[Dominaezzz]

How do you know it returns Unit? I'm guessing it throws some sort of casting exception.

[Loránd]

I dont know if i am debugging this correctly but i am using some breakpoints to step through the code and when i am at that method the IDE says the type of the returned value is Kotlin.Unit. I dont know if this might be an IDE issue or something.

[Dominaezzz]

Oh!

[Dominaezzz]

This suspend fun getUsers(): List<User> translates to fun getUsers(cont: Continuation<List<User>>): Any? underneath.

[Dominaezzz]

That might be why IDE is showing Unit.

[Dominaezzz]

AFAIK, debugging with coroutines and suspend functions isn't fully complete.

[Loránd]

I see, so there might actually be no problems in that case

[Dominaezzz]

Yes

[Loránd]

Alright, thanks i will continue debugging

[jw]

That signature isn't correct. suspend functions after transformation return Any?

[jw]

The return type becomes a union type of the actual return type (for synchronous returns) and a marker instance indicating suspension happened

[Dominaezzz]

Ah, didn't know that. Will update.