code: private void _substringmatch() throws
        IOException
    {
      if (debug)
      {
        checkState(reader.curChar == '*');
      }
      builder.type = Type.SUBSTRINGMATCH;
      builder.append("*=");
      reader.next();
      if (debug)
      {
        checkState(reader.curChar == '=');
      }
    }
docs: SUBSTRINGMATCH *=