progs/app51.scala
author Christian Urban <christian dot urban at kcl dot ac dot uk>
Mon, 28 Oct 2013 13:19:44 +0000
changeset 167 cfba674a8fdf
parent 93 4794759139ea
child 261 24531cfaa36a
permissions -rw-r--r--
added matcher

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