Experimental parser: add dfa path iterator

tools/lexer_generator/code_generator.jinja

 // 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 121 matching lines @@
       next_.is_onebyte = true;
     {%- endif -%}
     has_line_terminator_before_next_ = true;
     goto state_entry_0;
   {% elif type == 'token' %}
     DO_TOKEN(Token::{{args[0]}})
     return;
   {% elif type == 'do_stored_token' %}
     DO_TOKEN(stored_token)
     return;
-  {% elif type == 'do_token_and_go_forward' %}
-    DO_TOKEN(Token::{{args[0]}});
+  {% elif type == 'default' %}
+    DO_TOKEN(Token::ILLEGAL);
     FORWARD();
     RESET_START();
     return;
   {% elif type == 'harmony_token' %}
     if (harmony_{{args[0]}}_) {
       DO_TOKEN(Token::{{args[1]}});
     } else {
       DO_TOKEN(Token::{{args[2]}});
     }
     return;
@@ skipping 224 matching lines @@
     // force use of stored_token
     stored_token = Token::ILLEGAL;
     // force use of marker
     marker = NULL;
     // force use of state_entry_0
     goto state_entry_0;
   }
 }
 } }