/**
* undocumented function
*
* @param XPathExpr $xpath
* @param XPathExpr $expr
*
* @return XPathExpr
*/
protected function _xpath_nth_of_type($xpath, $expr)
{
if ($xpath->getElement() == '*') {
throw new ParseException('*:nth-of-type() is not implemented');
}
return $this->_xpath_nth_child($xpath, $expr, false, false);
}
/**
* Sets the XPath expression to be only of type.
*
* @param XPathExpr $xpath The XPath expression
*
* @return XPathExpr The modified expression
*
* @throws ParseException Because *:only-of-type is not implemented
*/
protected function xpath_only_of_type($xpath)
{
if ($xpath->getElement() == '*') {
throw new ParseException('*:only-of-type is not implemented');
}
$xpath->addCondition('last() = 1');
return $xpath;
}