Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:67581
Return-Path: <krebs.seb@gmail.com>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 29797 invoked from network); 28 May 2013 09:27:19 -0000
Received: from unknown (HELO lists.php.net) (127.0.0.1)
  by localhost with SMTP; 28 May 2013 09:27:19 -0000
Authentication-Results: pb1.pair.com smtp.mail=krebs.seb@gmail.com; spf=pass; sender-id=pass
Authentication-Results: pb1.pair.com header.from=krebs.seb@gmail.com; sender-id=pass
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 74.125.82.51 as permitted sender)
X-PHP-List-Original-Sender: krebs.seb@gmail.com
X-Host-Fingerprint: 74.125.82.51 mail-wg0-f51.google.com  
Received: from [74.125.82.51] ([74.125.82.51:36479] helo=mail-wg0-f51.google.com)
	by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP
	id 6E/8D-44058-67874A15 for <internals@lists.php.net>; Tue, 28 May 2013 05:27:18 -0400
Received: by mail-wg0-f51.google.com with SMTP id b13so2228797wgh.6
        for <internals@lists.php.net>; Tue, 28 May 2013 02:27:15 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=20120113;
        h=mime-version:in-reply-to:references:from:date:message-id:subject:to
         :cc:content-type;
        bh=MeIeLxLiiqftMMot5q+LXNUILrJN0nnjGX5Wx/QdQcE=;
        b=tcPzCDpkBtDR4+cXH936X50D1cxi2BqL95Qbsfuc3lmaubtUSv/AU1qWzy2uW9E1w9
         tK3L7TJSBbADvor05JRkg3f6S5QUm4VAKRbGkHU5w+B6LA0RZVVr3ZdV8DW+AN3Y5qNH
         xkyzUdX2oCSHotIgEWc+numB5iiExwJdscNQqOcm4XWjJYZ4BMLfEUl2Ux+KPJkumGIG
         X0uKahapQhW9u84bCSPOnKxZFhL3WjW+F+Tl2nEgrAVXTGqMdcALvvMezSPRlWiUEMC7
         BUxn1R6h5Ky3yaiiz0kAmdyx3NtyRfw7zorexGVRA/xO5mu/H8UECq/Pm/Puotf1KXNd
         2oMg==
X-Received: by 10.180.160.167 with SMTP id xl7mr11175111wib.62.1369733235873;
 Tue, 28 May 2013 02:27:15 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.217.116.7 with HTTP; Tue, 28 May 2013 02:26:55 -0700 (PDT)
In-Reply-To: <CAPaKmR=Fz5vm3HXcJYQo3QSvQp2bwsPkQUgHAx6QtLo4h0yZaA@mail.gmail.com>
References: <CAH-PCH738OneYAv-6jNvN5qXN0SzGyOMfxCd=vZ-qAykL_WZ6A@mail.gmail.com>
 <CAH-PCH7AUBq3RXTDYFMuf=dGgBRhP=Z0csG=Sjf=A=-O-XWYCA@mail.gmail.com>
 <06F1F2BA-A054-4B62-AD06-90B621995ADD@strojny.net> <51A474F0.4040408@php.net> <CAPaKmR=Fz5vm3HXcJYQo3QSvQp2bwsPkQUgHAx6QtLo4h0yZaA@mail.gmail.com>
Date: Tue, 28 May 2013 11:26:55 +0200
Message-ID: <CALtuQzBUm_4UnfkHiLGhOJG2VVYWvnf5FBS6H7Z3fyUxrC7uZQ@mail.gmail.com>
To: Amaury Bouchard <amaury@amaury.net>
Cc: Maciek Sokolewicz <maciek.sokolewicz@gmail.com>, Lars Strojny <lars@strojny.net>, 
	Ferenc Kovacs <tyra3l@gmail.com>, PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=047d7b624d74f61da604ddc3decc
Subject: Re: [PHP-DEV] supporting the final keyword for properties
From: krebs.seb@gmail.com (Sebastian Krebs)

--047d7b624d74f61da604ddc3decc
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: quoted-printable

2013/5/28 Amaury Bouchard <amaury@amaury.net>

> 2013/5/28 Maciek Sokolewicz <maciek.sokolewicz@gmail.com>
>
> > It=92s a good idea in general but what about having it for variables as
> >> well? Could open interesting possibilities for an optimizer.
> >>
> >> final $foo =3D "str";
> >> $foo =3D "bar"; // bails out
> >>
> >>  Don't we already have that? It just has a different name: constants.
>
>
> It's different. You can manipulate variables in some ways you can't with
> constants.
>
> This code, for example:
>    $a =3D 'abc';
>    $b =3D 'a';
>    print($$b);
>
> It will display "abc". It's currently not possible to do something simila=
r
> with constants.
>

define('FOO', 'bar');
$b =3D 'FOO';
print(constant($b));

and yes, constant() works for namespace- and class-constants too.


>
> I think the subject was already debated, but I wonder why we should write
> that:
>    final $foo =3D 'bar';
> instead of:
>    const $foo =3D 'bar';
>



--=20
github.com/KingCrunch

--047d7b624d74f61da604ddc3decc--