diff -r f352cb238c32 -r 2d0a59127694 progs/token2.scala
--- a/progs/token2.scala	Mon Dec 07 17:50:05 2015 +0000
+++ b/progs/token2.scala	Sat Dec 19 21:11:23 2015 +0000
@@ -225,7 +225,7 @@
 
 // Lexing Rules for a Small While Language
 
-val SYM = CRANGE("abcdefghijklmnopqrstuvwxyz")
+val SYM = CRANGE("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
 val DIGIT = CRANGE("0123456789")
 val ID = SYM ~ (SYM | DIGIT).% 
 val NUM = PLUS(DIGIT)
@@ -252,7 +252,7 @@
 
 // filters out all white spaces
 def tokenise(r: Rexp, s: String) = 
-  env(lexing_simp(r, s)).filterNot { (s) => s._1 == "w"}.mkString("\n")
+  env(lexing_simp(r, s)).filterNot { (s) => s._1 == "w"}
 
 //   Testing
 //============
@@ -293,8 +293,13 @@
 // Big Test
 //==========
 
+def escape(raw: String): String = {
+  import scala.reflect.runtime.universe._
+  Literal(Constant(raw)).toString
+}
+
 val prog2 = """
-write "fib";
+write "Fib";
 read n;
 minus1 := 0;
 minus2 := 1;
@@ -304,16 +309,155 @@
   minus1 := temp;
   n := n - 1
 };
-write "result";
+write "Result";
 write minus2
 """
 
+val prog3 = """
+start := 1000;
+x := start;
+y := start;
+z := start;
+while 0 < x do {
+ while 0 < y do {
+  while 0 < z do {
+    z := z - 1
+  };
+  z := start;
+  y := y - 1
+ };     
+ y := start;
+ x := x - 1
+}
+"""
+
+
 println("Tokens")
-println(tokenise(WHILE_REGS, prog2))
+println(tokenise(WHILE_REGS, prog2).mkString("\n"))
+
+val fib_tokens = tokenise(WHILE_REGS, prog2)
+fib_tokens.map{case (s1, s2) => (escape(s1), escape(s2))}.mkString(",\n")
+
 
+val test_tokens = tokenise(WHILE_REGS, prog3)
+test_tokens.map{case (s1, s2) => (escape(s1), escape(s2))}.mkString(",\n")
+
+
+/*
 for (i <- 1 to 120 by 10) {
   print(i.toString + ":  ")
   time(lexing_simp(WHILE_REGS, prog2 * i))
 }
+*/
 
+val toks_fib = 
+  List(("k","write"),
+       ("str","Fib"),
+       ("s",";"),
+       ("k","read"),
+       ("i","n"),
+       ("s",";"),
+       ("i","minus1"),
+       ("o",":="),
+       ("n","0"),
+       ("s",";"),
+       ("i","minus2"),
+       ("o",":="),
+       ("n","1"),
+       ("s",";"),
+       ("k","while"),
+       ("i","n"),
+       ("o",">"),
+       ("n","0"),
+       ("k","do"),
+       ("b","{"),
+       ("i","temp"),
+       ("o",":="),
+       ("i","minus2"),
+       ("s",";"),
+       ("i","minus2"),
+       ("o",":="),
+       ("i","minus1"),
+       ("o","+"),
+       ("i","minus2"),
+       ("s",";"),
+       ("i","minus1"),
+       ("o",":="),
+       ("i","temp"),
+       ("s",";"),
+       ("i","n"),
+       ("o",":="),
+       ("i","n"),
+       ("o","-"),
+       ("n","1"),
+       ("b","}"),
+       ("s",";"),
+       ("k","write"),
+       ("str","Result"),
+       ("s",";"),
+       ("k","write"),
+       ("i","minus2"))
 
+val toks_test =
+  List(("i","start"),
+       ("o",":="),
+       ("n","1000"),
+       ("s",";"),
+       ("i","x"),
+       ("o",":="),
+       ("i","start"),
+       ("s",";"),
+       ("i","y"),
+       ("o",":="),
+       ("i","start"),
+       ("s",";"),
+       ("i","z"),
+       ("o",":="),
+       ("i","start"),
+       ("s",";"),
+       ("k","while"),
+       ("n","0"),
+       ("o","<"),
+       ("i","x"),
+       ("k","do"),
+       ("b","{"),
+       ("k","while"),
+       ("n","0"),
+       ("o","<"),
+       ("i","y"),
+       ("k","do"),
+       ("b","{"),
+       ("k","while"),
+       ("n","0"),
+       ("o","<"),
+       ("i","z"),
+       ("k","do"),
+       ("b","{"),
+       ("i","z"),
+       ("o",":="),
+       ("i","z"),
+       ("o","-"),
+       ("n","1"),
+       ("b","}"),
+       ("s",";"),
+       ("i","z"),
+       ("o",":="),
+       ("i","start"),
+       ("s",";"),
+       ("i","y"),
+       ("o",":="),
+       ("i","y"),
+       ("o","-"),
+       ("n","1"),
+       ("b","}"),
+       ("s",";"),
+       ("i","y"),
+       ("o",":="),
+       ("i","start"),
+       ("s",";"),
+       ("i","x"),
+       ("o",":="),
+       ("i","x"),
+       ("o","-"),
+       ("n","1"),
+       ("b","}"))