Future

extension Future where Failure == Error {
    convenience init(awaiting operation: @escaping () async throws -> Output) {
        self.init { promise in
            Task {
                do {
                    let value = try await operation()
                    promise(.success(value))
                } catch {
                    promise(.failure(error))
                }
            }
        }
    }
}

extension Task where Failure == Error {
    init(priority: TaskPriority? = nil, completion: @escaping ( @escaping (Result<Success, Error>) -> Void) -> Void) {
        self.init(priority: priority) {
            try await withCheckedThrowingContinuation { continuation in
                completion(continuation.resume(with:))
            }
        }
    }
}