Expermental parser: fix state iteration in codegen

tools/lexer_generator/code_generator.py

 # Copyright 2013 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 70 matching lines @@
     }
 ''' % s.node_number()
 
     if action:
       code += '%s\nyych = *(--cursor_);\ngoto code_%s;\n' % (action.data(),
                                                              start_node_number)
     return code
 
   @staticmethod
   def dfa_to_code(dfa):
+    start_node_number = dfa.start_state().node_number()
     code = '''
 YYCTYPE yych = *cursor_;
 goto code_%s;
-''' % (dfa.start_state().node_number())
-    for n in dfa.all_states_iter():
-      code += CodeGenerator.dfa_state_to_code(n,
-                                              dfa.start_state().node_number())
-    return code
+''' % start_node_number
+    def f(state, code):
+      code += CodeGenerator.dfa_state_to_code(state, start_node_number)
+      return code
+    return dfa.visit_all_states(f, code)