private function error($message = "Unexpected '%s'")
{
list(, $line, $col) = self::$tokenizer->getOffset($this->n);
$token = isset(self::$tokenizer->tokens[$this->n])
? str_replace("\n", '<new line>', NStrings::truncate(self::$tokenizer->tokens[$this->n], 40))
: 'end';
throw new NNeonException(str_replace('%s', $token, $message) . " on line $line, column $col.");
}
