Treat assignment to final as an error

frog/value.dart

Index: frog/value.dart
diff --git a/frog/value.dart b/frog/value.dart
index 4466f3f3fb9d916b9e998cb46e3b054e9703ad8a..5bd7095492d443b7df11f4d27592c2afc73ad65d 100644
--- a/frog/value.dart
+++ b/frog/value.dart
@@ -21,6 +21,9 @@ class Value {
   /** Is this a pretend first-class type? */
   bool isType = false;
 
+  /** Is this a final variable? */
+  bool isFinal = false;

[jimhug, 2011/11/17 15:36:15]

Okay for now - but this is a reminder that I need to get back to my refactoring
of Value to reduce the amount of state we keep here and use subtypes when
appropropriate.

+
   /** If we reference this value multiple times, do we need a temp? */
   bool needsTemp;