Experimental parser: some unit tests

tools/lexer_generator/regex_parser.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 107 matching lines @@
   def p_error(self, p):
     raise Exception("Syntax error in input '%s'" % p)
 
   @staticmethod
   def __cat(left, right):
     if right == None:
       return left
     return ('CAT', left, right)
 
   def build(self, **kwargs):
-    self.parser = yacc.yacc(module=self, **kwargs)
+    self.parser = yacc.yacc(module=self, debug=0, write_tables=0, **kwargs)
     self.lexer = RegexLexer()
     self.lexer.build(**kwargs)
 
   def parse(self, data):
     return self.parser.parse(data, lexer=self.lexer.lexer)