* @license http://opensource.org/licenses/MIT MIT */ declare(strict_types=1); namespace Ramsey\Collection; /** * A set is a collection that contains no duplicate elements. * * Great care must be exercised if mutable objects are used as set elements. * The behavior of a set is not specified if the value of an object is changed * in a manner that affects equals comparisons while the object is an element in * the set. * * Example usage: * * ``` php * $foo = new \My\Foo(); * $set = new Set(\My\Foo::class); * * $set->add($foo); // returns TRUE, the element don't exists * $set->add($foo); // returns FALSE, the element already exists * * $bar = new \My\Foo(); * $set->add($bar); // returns TRUE, $bar !== $foo * ``` * * @template T * @extends AbstractSet */ class Set extends AbstractSet { /** * The type of elements stored in this set * * A set's type is immutable. For this reason, this property is private. * * @var string */ private $setType; /** * Constructs a set object of the specified type, optionally with the * specified data. * * @param string $setType The type (FQCN) associated with this set. * @param array $data The initial items to store in the set. */ public function __construct(string $setType, array $data = []) { $this->setType = $setType; parent::__construct($data); } public function getType(): string { return $this->setType; } }