progs/app03.scala
author Christian Urban <urbanc@in.tum.de>
Wed, 06 Dec 2017 00:06:37 +0000 (2017-12-06)
changeset 543 16adebf18ef9
parent 400 e4afe3f46c29
permissions -rw-r--r--
updated
abstract class Rexp
case object ZERO extends Rexp
case object ONE extends Rexp
case class CHAR(c: Char) extends Rexp
case class ALT(r1: Rexp, r2: Rexp) extends Rexp 
case class SEQ(r1: Rexp, r2: Rexp) extends Rexp 
case class STAR(r: Rexp) extends Rexp 
case class REC(x: String, r: Rexp) extends Rexp