Has public emit, complete, and fail methods. */ private $emitter; /** @var Iterator Hides producer methods. */ private $iterator; public function __construct() { $this->emitter = new class implements Iterator { use Internal\Producer { emit as public; complete as public; fail as public; } }; $this->iterator = new Internal\PrivateIterator($this->emitter); } /** * @return Iterator * @psalm-return Iterator */ public function iterate(): Iterator { return $this->iterator; } /** * Emits a value to the iterator. * * @param mixed $value * * @psalm-param TValue $value * * @return Promise * @psalm-return Promise * @psalm-suppress MixedInferredReturnType * @psalm-suppress MixedReturnStatement */ public function emit($value): Promise { /** @psalm-suppress UndefinedInterfaceMethod */ return $this->emitter->emit($value); } /** * Completes the iterator. * * @return void */ public function complete() { /** @psalm-suppress UndefinedInterfaceMethod */ $this->emitter->complete(); } /** * Fails the iterator with the given reason. * * @param \Throwable $reason * * @return void */ public function fail(\Throwable $reason) { /** @psalm-suppress UndefinedInterfaceMethod */ $this->emitter->fail($reason); } }