destructuregex.kt

fun parsePhoneNumber(text: String): PhoneNumber {
  
  val destructuredRegex = "([0-9]{3})-([0-9]{3})-([0-9]{4})".toRegex()
  
  return destructuredRegex.matchEntire(text)
      ?.destructured
      ?.let { (areaCode, prefix, lineNumber) ->
        PhoneNumber(areaCode.toInt(), prefix.toInt(), lineNumber.toInt())
      } 
        ?: throw IllegalArgumentException("Bad input '$text'")
}