protected function parseTag($tag, $start, $end)
{
parent::parseTag($tag, $start, $end);
// Save column numbers for all non-empty members
$cols = array();
for ($i = $start + 1; $i < $end; $i++) {
if (trim($this->words[$i]) != '') {
$cols[] = $this->columnNums[$i];
}
}
$this->_tagColumns[$tag][] = $cols;
}
