Setup getter and setter elements.

dart/frog/leg/frog_leg.dart

Index: dart/frog/leg/frog_leg.dart
diff --git a/dart/frog/leg/frog_leg.dart b/dart/frog/leg/frog_leg.dart
index f1febacfc067cfc7fe6d885bedb1b329c4ae296a..3dbfce1a2c4b8261a01acd30426323ad8cd5494c 100644
--- a/dart/frog/leg/frog_leg.dart
+++ b/dart/frog/leg/frog_leg.dart
@@ -91,16 +91,23 @@ class WorldCompiler extends Compiler {
 
   String get legDirectory() => io.join([frog.options.libDir, '..', 'leg']);
 
-  void cancel([String reason, Node node, token, instruction]) {
+  void cancel([String reason, Node node, token, instruction, element]) {
     Script script = currentScript();
     if (node !== null) {
       print(spanFromNode(node, script).toMessageString("cancel leg: $reason"));
-    } else if (token !== null) {
-      String tokenString = token.toString();
-      int begin = token.charOffset;
-      int end = begin + tokenString.length;
-      print(script.file.getLocationMessage("cancel leg: $reason",
-                                           begin, end, true));
+    } else {
+      if (token === null && element !== null) {

[ahe, 2012/01/24 16:01:35]

This is way too complicated. I have made a better version that uses this
newfangled technology called "recursion".

+        currentElement = element;
+        script = currentScript();
+        token = element.position();
+      }
+      if (token !== null) {
+        String tokenString = token.toString();
+        int begin = token.charOffset;
+        int end = begin + tokenString.length;
+        print(script.file.getLocationMessage("cancel leg: $reason",
+                                             begin, end, true));
+      }
     }
     if (throwOnError) {
       throw new AbortLeg(reason);