Support context receivers

[Kantis]

Expected Behavior

Ktlint should handle Kotlin files where context receivers are used.

Current Behavior

Scanning a file which includes a function using context receivers from Kotlin 1.6.20 currently fails with

Not a valid Kotlin file (5:1 expecting a top level declaration) (cannot be auto-corrected)

Example declaration from Kotlin blog

interface LoggingContext {
    val log: Logger // This context provides a reference to a logger 
}

context(LoggingContext)
fun startBusinessOperation() {
    // You can access the log property since LoggingContext is an implicit receiver
    log.info("Operation has started")
}

fun test(loggingContext: LoggingContext) {
    with(loggingContext) {
        // You need to have LoggingContext in a scope as an implicit receiver
        // to call startBusinessOperation()
        startBusinessOperation()
    }
}

Additional information

• Current version of ktlint: 0.45.1

[romtsn]

Please give the snapshot a try while this is not released

[Kantis]

Can confirm snapshot works as expected @romtsn. Thanks to you both, @paul-dingemans 🙌🏼