Will it be possible to pass function references to...

# language-proposals

[Emil Kantis]

Will it be possible to pass function references to functions using context receivers in the future? E.g.

context(MyContext)
fun sayHello(name: String) {
  println("Hello $name")
}

fun main() {
  with(context) {
    listOf("a", "b").forEach(::sayHello)
  }
}

Right now it gives an error because sayHello is a KFunction2<MyContext, String,Unit> when a (TypeVariable(T)) -> Unit was expected.

[elizarov]

The interaction of context receivers with callable references is still to be designed. Here you are looking for some sort of “context-bound callable references” similar to callable references to members. It creates lots of design question we don’t have any answer for. I’ve opened an issue here https://youtrack.jetbrains.com/issue/KT-54594/Context-bound-callable-references-to-contextual-functions