*/ private $promise; /** @var callable(T):void */ private $resolveCallback; /** @var callable(\Throwable):void */ private $rejectCallback; /** * @param (callable(callable(T):void,callable(\Throwable):void):void)|null $canceller */ public function __construct(?callable $canceller = null) { $this->promise = new Promise(function ($resolve, $reject) : void { $this->resolveCallback = $resolve; $this->rejectCallback = $reject; }, $canceller); } /** * @return PromiseInterface */ public function promise() : PromiseInterface { return $this->promise; } /** * @param T $value */ public function resolve($value) : void { ($this->resolveCallback)($value); } public function reject(\Throwable $reason) : void { ($this->rejectCallback)($reason); } }