/**
* Recurse through the container stack
*
* Recurse through the container stack and call the optimize method for
* each child.
*
* Returns true, if something has been modified, and false otherwise.
*
* @param slRegularExpression $regularExpression
* @return bool
*/
protected function recurse(slRegularExpression $regularExpression)
{
if (!$regularExpression instanceof slRegularExpressionContainer) {
return false;
}
$modified = false;
$children = $regularExpression->getChildren();
foreach ($children as &$child) {
$modified |= $this->optimize($child);
}
if ($modified) {
$regularExpression->setChildren($children);
}
return (bool) $modified;
}
