app51.scala
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Fri, 23 Nov 2012 15:17:17 +0000
changeset 72 d65525aeca08
parent 7 73cf4406b773
permissions -rw-r--r--
added

abstract class Rexp

case object NULL extends Rexp
case object EMPTY 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