如何在swift中显示包含多个错误的错误消息？

enum CustomError: Error {
    case error1
    case error2
    case error3
}

func process() throws {
    throw CustomError.error1
}

func main() {
    do {
        try process()
    } catch CustomError.error1 {
        print("Error 1 occurred")
    } catch CustomError.error2 {
        print("Error 2 occurred")
    } catch CustomError.error3 {
        print("Error 3 occurred")
    } catch {
        print("Unknown error occurred")
    }
}

main()