compiler/testData/codegen/patternMatching/rangeChar.kt - third_party/github/JetBrains/kotlin - Git at Google

 fun isDigit(a: Char) = when(a) {
   in '0'..'9' -> "digit"
   else -> "something"
 }
	fun isDigit(a: Char) = when(a) {
	in '0'..'9' -> "digit"
	else -> "something"
	}