Laravel中類中的建構函式傳參是可以自動new一個傳遞進去的嗎？

這是 Laravel中 Auth\Guard的建構函式：

    /**     * Create a new authentication guard.     *     * @param  \Illuminate\Auth\UserProviderInterface  $provider     * @param  \Illuminate\Session\Store  $session     * @param  \Symfony\Component\HttpFoundation\Request  $request     * @return void     */    public function __construct(UserProviderInterface $provider,                                SessionStore $session,                                Request $request = null)    {        $this->session = $session;        $this->request = $request;        $this->provider = $provider;    }

其中傳入了參數SessionStore $session
但是session的建構函式是這樣的:

public function __construct($name, SessionHandlerInterface $handler, $id = null)    {        $this->setId($id);        $this->name = $name;        $this->handler = $handler;        $this->metaBag = new MetadataBag;    }

這裡是有參數的，為什麼Guard的建構函式可以自動產生session?
是php原生提供的還是Laravel提供的?

回複內容：

這是Laravel中Auth\Guard的建構函式：

    /**     * Create a new authentication guard.     *     * @param  \Illuminate\Auth\UserProviderInterface  $provider     * @param  \Illuminate\Session\Store  $session     * @param  \Symfony\Component\HttpFoundation\Request  $request     * @return void     */    public function __construct(UserProviderInterface $provider,                                SessionStore $session,                                Request $request = null)    {        $this->session = $session;        $this->request = $request;        $this->provider = $provider;    }

其中傳入了參數SessionStore $session
但是session的建構函式是這樣的:

public function __construct($name, SessionHandlerInterface $handler, $id = null)    {        $this->setId($id);        $this->name = $name;        $this->handler = $handler;        $this->metaBag = new MetadataBag;    }

這裡是有參數的，為什麼Guard的建構函式可以自動產生session?
是php原生提供的還是Laravel提供的?

https://github.com/laravel/framework/blob/4.2/src/Illuminate/Auth/AuthManager.php#L51

/** * Create an instance of the Eloquent driver. * * @return \Illuminate\Auth\Guard */public function createEloquentDriver(){    $provider = $this->createEloquentProvider();    return new Guard($provider, $this->app['session.store']);}

