For some reason I can't do this in my project ```val f: Flow<Int> = flow<Int> { emit(1) ...

# coroutines

[julian]

For some reason I can't do this in my project

val f: Flow<Int> = flow<Int> { emit(1) }.transform<Int, Int> { emit(it) }

When I compile, I get

Error:(6, 32) Kotlin: Unresolved reference: transform
Error:(10, 47) Kotlin: Unresolved reference: transform
Error:(10, 69) Kotlin: Unresolved reference: emit
Error:(10, 74) Kotlin: Unresolved reference: it

So I set up a new project with the same dependency on kotlinx-coroutines-core:1.3.7. That works fine.

Also, oddly, all my other flow-related code that doesn't use transform is fine.

Has anyone else encountered this before?

[Dico]

It looks like you are lacking imports at the top of your file?

[julian]

@Dico Yeah, no missing imports.

import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.FlowPreview
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.flow
import kotlinx.coroutines.flow.transform

@FlowPreview
@ExperimentalCoroutinesApi
fun main() {
    val f4: Flow<Int> = flow<Int> { emit(1) }.transform<Int, Int> { emit(it) }
}

[julian]

In fact the IDE shows no errors. Errors only show in the build output log when I try to build or run.

[Mayank]

Seems like build cache or configuration issue. Try cleaning and rebuilding the project

[julian]

No luck. I tried deleting the build folder, cleaning and rebuilding, invalidating cache and restarting and rebuilding, and deleting the kotlinx libraries from .gradle/caches .

[Mayank]

Try deleting .gradle folder in your project root. It has solved some issues for me in the past

[julian]

Solved. Thanks all!