--- a/progs/re1.scala	Wed Jun 28 12:46:23 2017 +0100
+++ b/progs/re1.scala	Thu Aug 03 01:21:19 2017 +0100
@@ -1,5 +1,6 @@
 // Simple matcher for basic regular expressions
 
+object Test {
 
 abstract class Rexp
 case object ZERO extends Rexp                    // matches nothing
@@ -21,6 +22,8 @@
 
 }
 
+}
+
 // derivative of a regular expression w.r.t. a character
 def der (c: Char, r: Rexp) : Rexp = r match {
   case ZERO => ZERO