Sample case class with companion object that sanitizes parameters before instantiating new case class instance

Main.scala

package test

abstract case class AustralianPostcode private (value: String) {
	require(value.matches("""\d{4}"""))
}
object AustralianPostcode {
	def apply(value: String) = new AustralianPostcode(value.trim){}
}

object Main extends App {
	val p1 = AustralianPostcode(" 1234   ")
	val p2 = AustralianPostcode(" 1234   ")
	
	p1 match {
		case AustralianPostcode(v:String) => println(v)
	}
	
	print(p1)
	print(p2)
	println(p1 == p2)
	println(p1.hashCode())
	println(p2.hashCode())
	
	def print(p: AustralianPostcode) = println(p)
}