/**
* Constructs an LeftistHeap.
*
* @param mixed $key A key. (Optional).
*/
public function __construct($key = NULL)
{
if ($key === NULL) {
parent::__construct(NULL, NULL, NULL);
$this->nullPathLength = 0;
} else {
parent::__construct($key, new LeftistHeap(), new LeftistHeap());
$this->nullPathLength = 1;
}
}
public function __construct()
{
parent::__construct(NULL, NULL, NULL);
}
/**
* Constructs a ExpressionTree that consists
* of a single (leaf) node with the specified label.
*
* @param string $c The label on this node.
*/
public function __construct($c)
{
parent::__construct(new BoxedString($c));
}
