Hey, I already asked this in the coroutines channe...

# reflect

[Maciej S]

Hey, I already asked this in the coroutines channel, but maybe this channel is more appropriate. I have a question regarding suspending function types and reflection, details in 🧵

[Maciej S]

Consider the following code:

@JvmInline
value class DummySuspendValue(val block: suspend () -> Unit)

...

val a = DummySuspendValue {}
val classifier = a::class.declaredMemberProperties.first().returnType.classifier

In the example above, classifier is null . According to the docs, `classifier`:

Returns null if this type is not denotable in Kotlin, for example if it is an intersection type.

If I were to go by the reflection behaviour and the docs, I’d have to conclude that a suspending function type is non-denotable.

If I remove the suspend modifier like so:

@JvmInline
value class DummySuspendValue(val block: () -> Unit)

the classifier is no longer null.

Is that expected behaviour?

[udalov]

Please report an issue at https://kotl.in/issue, this looks like a bug

[udalov]

Just in case, I've reported it at KT-79206 Reflection: suspend functional type classifier is null