Hi I have a kotlin warning that I don't understand...

# getting-started

[Nicola]

Hi
I have a kotlin warning that I don't understand.
I have an enum type parameter, eg:

enum class FileOperationType {
    DOWNLOAD,
    DOWNLOAD_AND_MOVE,
    DOWNLOAD_AND_REMOVE
}

and a function which expects a parameter of that type.

fun downloadAllToLocalFolder(
    fileOperation: FileOperation, 
...

In a test I invoke that function:

target.downloadAllToLocalFolder(
    FileOperation(DOWNLOAD ...

In this line kotlin issues this warning:

Unexpected fileOperation: DOWNLOAD

what does it mean?

[Nicola]

All enum values are handled in the function. I tried anyway with the other values but the warning remains (obviously changing its target eg unexpected type fileOperation.DOWNLOAD_AND_REMOVE and so on)

[Sam]

The type of the enum, FileOperationType, doesn't seem to be the same as the type of the function parameter, FileOperation. Is that mismatch the cause of the problem?

[Nicola]

I forgot an important piece.
Actually the function parameter is FileOperation which contains FileOperation Type

[Nicola]

data class FileOperation(
    val type: FileOperationType,
    val hostSourceFolder: FolderName,
    val localDestinationFolder: FolderName,
    val hostDestinationFolder: FolderName? = null
)

The line which calls the function builds a FileOperation instance, the first parameter is the "type":

target.downloadAllToLocalFolder(
    FileOperation(DOWNLOAD, "/$remotePath", outputFolderPath),
...

[CLOVIS]

Can you try to reproduce the warning on https://play.kotlinlang.org/ ? We definitely don't have enough information here to tell you what's going on

[Nicola]

Thanks for the suggestion, I am trying to port the code there line by line

[Nicola]

with empty function the warning doesn't show up, I will add one line at a time to see which one causes the warning