/**
* Fill a range given starting and ending character
*
* @return void
* @access public
*/
public function fillRange(Scope $head, $start, $end)
{
$start_index = Utf8::ord($start);
$ending_index = Utf8::ord($end);
if ($ending_index < $start_index) {
throw new ParserException(sprintf('Character class range %s - %s is out of order', $start, $end));
}
for ($i = $start_index; $i <= $ending_index; $i++) {
$head->setLiteral($i, Utf8::chr($i));
}
}
