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Date: Tue, 17 Dec 2013 07:33:16 +0800
Message-ID: <CAHMUw2HJSHcjKoN56ZOO66TOX-eDRHSFC8VgTAP8erbrkOMCEw@mail.gmail.com>
To: Rowan Collins <rowan.collins@gmail.com>
Cc: PHP Internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=001a11c1ff447e843304edaf3c90
Subject: Re: [PHP-DEV] [PROPOSAL] Alphanumeric decrement
From: tjerk.meesters@gmail.com (Tjerk Meesters)

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On Tue, Dec 17, 2013 at 2:26 AM, Rowan Collins <rowan.collins@gmail.com>wrote:

> Tjerk Meesters wrote (on 13/12/2013):
>
>> Basically it makes the `$x++` or `++$x` work as if you types `$x += 1` or
>> `$x = $x + 1` (except for arrays, currently)
>> ++null becomes int(1), --null becomes int(-1)
>>
>
> Yes please! One of my colleagues once raised a bug that currently
> incrementing null results in 1, but decrementing it results in it remaining
> null. On the other hand, `null -= 1` results in -1 as you would expect.
>
> The bug was closed as invalid, stating that this is documented behaviour,
> but I have never understood why this would be anything other than an
> accidental side effect of implementation, nor why you would ever rely on it.
>
>
>  ++"123a" becomes "123b" but with a notice that string increment is
>> deprecated
>>
>
> Lukewarm on this part; the current syntax seems fairly logical to me, and
> the proposed new functions more ugly for no very good reason.
>

I would love to completely eradicate it, but I also realize that there's
existing code using it, such as:

for ($class = 'A1'; $class <= 'A4'; ++$class);

It might be hard to find the places where such code is being used, so I
figured it made sense to have a deprecation period instead.


>
> Regards,
> --
> Rowan Collins
> [IMSoP]
>
>
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>


-- 
--
Tjerk

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