diff -r 47f86885d481 -r e85600529ca5 app8.scala
--- a/app8.scala	Sun Dec 23 00:38:56 2012 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,23 +0,0 @@
-class SeqParser[I, T, S](p: => Parser[I, T], 
-                         q: => Parser[I, S]) 
-                             extends Parser[I, (T, S)] {
-  def parse(sb: I) = 
-    for ((head1, tail1) <- p.parse(sb); 
-         (head2, tail2) <- q.parse(tail1)) 
-            yield ((head1, head2), tail2)
-}
-
-class AltParser[I, T](p: => Parser[I, T], 
-                      q: => Parser[I, T]) 
-                          extends Parser[I, T] {
-  def parse(sb: I) = p.parse(sb) ++ q.parse(sb)   
-}
-
-class FunParser[I, T, S](p: => Parser[I, T], f: T => S) 
-  extends Parser[I, S] {
-  def parse(sb: I) = 
-    for ((head, tail) <- p.parse(sb)) 
-      yield (f(head), tail)
-}
-
-