Add an assigned variables analysis....

src/scopes.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 259 matching lines @@
 
   // Determine if we can use lazy compilation for this scope.
   bool AllowsLazyCompilation() const;
 
   // True if the outer context of this scope is always the global context.
   bool HasTrivialOuterContext() const;
 
   // The number of contexts between this and scope; zero if this == scope.
   int ContextChainLength(Scope* scope);
 
-
   // ---------------------------------------------------------------------------
   // Debugging.
 
 #ifdef DEBUG
   void Print(int n = 0);  // n = indentation; n < 0 => don't print recursively
 #endif
 
   // ---------------------------------------------------------------------------
   // Implementation.
  protected:
@@ skipping 101 matching lines @@
   virtual VariableProxy* NewUnresolved(Handle<String> name, bool inside_with) {
     return NULL;
   }
   virtual VariableProxy* NewTemporary(Handle<String> name)  { return NULL; }
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCOPES_H_