FutureInterface.php

<?php

declare (strict_types=1);
namespace OpenTelemetry\SDK\Common\Future;

use Closure;

/**
 * @template-covariant T
 */
interface FutureInterface {
    
    /**
     * @psalm-return T
     */
    public function await();
    
    /**
     * @psalm-template U
     * @psalm-param Closure(T): U $closure
     * @psalm-return FutureInterface<U>
     *
     * @psalm-suppress InvalidTemplateParam
     */
    public function map(Closure $closure) : FutureInterface;
    
    /**
     * @psalm-template U
     * @psalm-param Closure(\Throwable): U $closure
     * @psalm-return FutureInterface<T|U>
     */
    public function catch(Closure $closure) : FutureInterface;

}