Hey, Kotlin poet question - is there a way to prevent typealias imports for functions being resolved...

# squarelibraries

[krzysztof]

Hey, Kotlin poet question - is there a way to prevent typealias imports for functions being resolved into kotlin.FunctionX types?
Having typealias Fn0<R> = () -> R and changing it className (via ::class.toClassName), results in actual usage of kotlin.Function0

[damian]

I don't think so. KotlinPoet would have to internally map kotlin.Function0 and friends to LambdaTypeName in, for example, toTypeName, but that would probably be unexpected for someone who did literally want Function0.

I say it would have to happen in toTypeName rather than toClassName since when you use ::class, you are getting the KClass, which is the kotlin.Function0 class. If you use toClassName, you are going to get a ClassName and not a LambdaTypeName.

You could probably write your own function to do this (by using typeOf) but it's a lossy transformation anyway, since receiver types are not represented in kotlin.Function* (they are just regular parameters). So you might as well use LambdaTypeName

[jw]

Right. It's the Kotlin compiler that is resolving the typealias here, not KotlinPoet.

[krzysztof]

thank you both, that totally make sense 🙏 Thanks @damian for insight, I have few ideas how to make it work