This rule reports labeled expressions. Expressions with labels generally increase complexity and worsen the maintainability of the code. Refactor the violating code to not use labels instead. Labeled expressions referencing an outer class with a label from an inner class are allowed, because there is no way to get the instance of an outer class from an inner class in Kotlin.

Noncompliant Code

val range = listOf<String>("foo", "bar")
loop@ for (r in range) {
  if (r == "bar") break@loop
  println(r)
}
class Outer {
  inner class Inner {
    fun f() {
      val i = this@Inner // referencing itself, use 'this instead
    }
  }
}

Compliant Code

val range = listOf<String>("foo", "bar")
for (r in range) {
  if (r == "bar") break
  println(r)
}
class Outer {
  inner class Inner {
    fun f() {
      val outer = this@Outer
    }
    fun Int.extend() {
    val inner = this@Inner // this would reference Int and not Inner
    }
  }
}

Options

• ignoredLabels (default: [])

  allows to provide a list of label names which should be ignored by this rule