diff -r fa92e8f089a2 -r 8b5ed306e961 Fahad/Scala/POSIX.sc
--- a/Fahad/Scala/POSIX.sc	Sun Oct 26 16:42:28 2014 +0000
+++ b/Fahad/Scala/POSIX.sc	Mon Oct 27 12:40:19 2014 +0000
@@ -247,8 +247,58 @@
     result
   }                                               //> time: [T](code: => T)T
 
-  val prog0 = """read n"""                        //> prog0  : String = read n
-  //env(lexing_simp(WHILE_REGS, prog0))
-
-  println("Next test")                            //> Next test
+  
+  val abc = List('a', 'b', 'c')                   //> abc  : List[Char] = List(a, b, c)
+  val nullRexp = null                             //> nullRexp  : Null = null
+  val myRexp = charlist2rexp(abc)                 //> myRexp  : greeter.POSIX.Rexp = SEQ(CHAR(a),SEQ(CHAR(b),CHAR(c)))
+  val myRexp2 = string2rexp("FahadAusaf")         //> myRexp2  : greeter.POSIX.Rexp = SEQ(CHAR(F),SEQ(CHAR(a),SEQ(CHAR(h),SEQ(CHA
+                                                  //| R(a),SEQ(CHAR(d),SEQ(CHAR(A),SEQ(CHAR(u),SEQ(CHAR(s),SEQ(CHAR(a),CHAR(f))))
+                                                  //| ))))))
+  
+  RexpOps(myRexp2)                                //> res2: AnyRef{def |(s: greeter.POSIX.Rexp): greeter.POSIX.ALT; def %: greete
+                                                  //| r.POSIX.STAR; def ~(s: greeter.POSIX.Rexp): greeter.POSIX.SEQ} = greeter.PO
+                                                  //| SIX$$anonfun$main$1$$anon$1@37ecb28e
+  
+  stringOps("Fahad")                              //> res3: AnyRef{def |(r: greeter.POSIX.Rexp): greeter.POSIX.ALT; def |(r: Stri
+                                                  //| ng): greeter.POSIX.ALT; def %: greeter.POSIX.STAR; def ~(r: greeter.POSIX.R
+                                                  //| exp): greeter.POSIX.SEQ; def ~(r: String): greeter.POSIX.SEQ; def $(r: gree
+                                                  //| ter.POSIX.Rexp): greeter.POSIX.RECD} = greeter.POSIX$$anonfun$main$1$$anon$
+                                                  //| 2@14bea551
+                                                  
+	size(myRexp2)                             //> res4: Int = 19
+	nullable(nullRexp)                        //> scala.MatchError: null
+                                                  //| 	at greeter.POSIX$$anonfun$main$1.nullable$1(greeter.POSIX.scala:59)
+                                                  //| 	at greeter.POSIX$$anonfun$main$1.apply$mcV$sp(greeter.POSIX.scala:202)
+                                                  //| 	at org.scalaide.worksheet.runtime.library.WorksheetSupport$$anonfun$$exe
+                                                  //| cute$1.apply$mcV$sp(WorksheetSupport.scala:76)
+                                                  //| 	at org.scalaide.worksheet.runtime.library.WorksheetSupport$.redirected(W
+                                                  //| orksheetSupport.scala:65)
+                                                  //| 	at org.scalaide.worksheet.runtime.library.WorksheetSupport$.$execute(Wor
+                                                  //| ksheetSupport.scala:75)
+                                                  //| 	at greeter.POSIX$.main(greeter.POSIX.scala:3)
+                                                  //| 	at greeter.POSIX.main(greeter.POSIX.scala)
+	
+	val newRexp = der('a',myRexp)
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  
+  //this is some crap
 }
\ No newline at end of file