Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:90706
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Message-ID: <12.0F.20254.2D29D965@pb1.pair.com>
To: internals@lists.php.net
References: <20160118131911.DA1832607EC@dd15934.kasserver.com>
Date: Tue, 19 Jan 2016 01:35:10 +0000
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:42.0)
 Gecko/20100101 Firefox/42.0 SeaMonkey/2.39
MIME-Version: 1.0
In-Reply-To: <20160118131911.DA1832607EC@dd15934.kasserver.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] [RFC] Allow specifying keys in list()
From: ajf@ajf.me (Andrea Faulds)

Hi Thomas,

Thomas Bley wrote:
> What about using objects with list()?
>
> class Point {
> public function __construct($x, $y) {
>    $this->x = $x;
>    $this->y = $y;
> }
> }
>
> $point = new Point(21, 42);
> list('x' => $x, 'y' => $y) = $point;

You can't do `$x = $point['x'];`, so `list("x" => $x) = $point;` won't 
work either. If you want list() support, implement ArrayAccess.

We could potentially add some extension to list() for object 
destructuring, but I'm not sure I'd be happy with that, as list() has 
thus far been an array-only thing. If we ever add object literals, then 
we could do object destructuring with a symmetrical syntax.

Thanks.
-- 
Andrea Faulds
https://ajf.me/