Kotlin Local Returns

snippet.kt

// Kotlin's standard library extension
inline fun Array<String>.forEach(action: (String) -> Unit) {
  for(str in this) {
    action(str)
  }
}

val list = listOf("Kotlin", "Java", "Groovy")

// a bare return statement in a lambda called from 
// an inline function return from the enclosing function.
fun main() {
  list.forEach {
    println(it)
    if(it == "Kotlin") return  // return from main !
  }
  println("never reached")
}

// because it expands to:

fun main() {
  for(str in list) {
    println(str)
    if(str == "Kotlin") return
  }
  println("never reached")
}