Experimental lexer generator: build fixes.

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 103 matching lines @@
 namespace v8 {
 namespace internal {
 uint32_t EvenMoreExperimentalScanner::DoLex() {
   YYCTYPE yych = *cursor_;
   goto code_%s;
 ''' % start_node_number
     def f(state, code):
       code += CodeGenerator.dfa_state_to_code(state, start_node_number)
       return code
     code = dfa.visit_all_states(f, code)
+
+    default_action_code = ''
+    if rule_processor.default_action:
+      if rule_processor.default_action.type() == 'push_token':
+        default_action_code = '''
+default_action:
+  //fprintf(stderr, "default action\\n");
+  PUSH_TOKEN(Token::%s)
+  goto code_%s;''' % (rule_processor.default_action.data(), start_node_number)
+      else:
+        raise Exception("Default action type %s not supported" % action.type())
+
     code += '''
   CHECK(false);
-default_action:
-  //fprintf(stderr, "default action\\n");
-  %s
-  goto code_%s;
+%s
   return 0;
 }
 
 }
 }
-''' % (rule_processor.default_action, start_node_number)
+''' % default_action_code
     return code