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Date: Wed, 26 Jun 2013 13:54:18 +0200
To: Michael Wallner <mike@php.net>, =?UTF-8?Q?Johannes_Schl=C3=BCter?=
 <johannes@schlueters.de>
Cc: Stas Malyshev <smalyshev@sugarcrm.com>, Sherif Ramadan
 <theanomaly.is@gmail.com>, "=?UTF-8?Q?internals=40lists.php.net?="
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Subject: 
 =?UTF-8?Q?Re=3A_=5BPHP-DEV=5D_RE=3A_Announcing_RFC_'Anonymous_Catches'?=
From: joost.koehoorn@gmail.com (Joost Koehoorn)

On 26 juni 2013 at 08:35:59, Michael Wallner (mike=40php.net) wrote:
On 25 June 2013 22:23, Johannes Schl=C3=BCter <johannes=40schlueters.de> =
wrote:=C2=A0
> On Tue, 2013-06-25 at 13:19 -0700, Stas Malyshev wrote:=C2=A0
>> Hi=21=C2=A0
>>=C2=A0
>> > If I'm to understand this R=46C correctly, it is nothing more than a=
=C2=A0
>> > random suggestion someone posed in the form of a tweet and the autho=
r is=C2=A0
>> > saying why not add it since it's not hard to implement. So in summat=
ion=C2=A0
>>=C2=A0
>> Well, here we go - this is why not add it, because it makes working wi=
th=C2=A0
>> such code harder without actually benefiting anybody.=C2=A0
>=C2=A0
> +1=C2=A0
>=C2=A0
> Right now I set a breakpoint in my editor and look at an exception even=
=C2=A0
> if it is not used, in future I'd have to change the code for that.=C2=A0=


Hrm, this is a very good point=21=C2=A0

>> > So this entire discussion can be summed up nicely with =22Let's make=
 the=C2=A0
>> > variable optional because... why not=3F=22.=C2=A0
>>=C2=A0
>> =22Why not=22 is usually not a very good principle of language design,=
 IMO.=C2=A0


Nothing more to add.=C2=A0

--=C2=A0
Regards,=C2=A0
Mike=C2=A0
This is a little pathetic. Someone sums it up to =22Why not=22, which is =
not the case, we have grounded arguments for this, and then all agree tha=
t =22Why not=22 is not a reason to add something. Surely it isn't.

You mention bad coding practices. Sure, we should avoid them. Unused vari=
ables is a bad coding practice. So, we should avoid them. Luckily, it's e=
asy to avoid them with catch-statements, because we can simply make the v=
ariable optional.

I recently wrote a CLI tool in C=23 to import data from Team =46oundation=
 Server. During an update, I try to download every new commits from where=
 I last stopped (so, from commit =22latest+1=22). That fails with a Chang=
esetNot=46oundException when no such commit exists, fair enough. I cannot=
 test beforehand whether that exception will be thrown (that would mean I=
 needed two calls to the server, now it's in one round) so it's totally e=
xpected. I'm doing this for 100.000 files and I don't want to do anything=
 with the exception, it's nothing more than an indication that we're alre=
ady up-to-date for that file. Done. In PHP I would have an unused variabl=
e, which trips up my static analysis tool that keeps warning me about the=
 bad coding practice of having an unused variable. I agree, it's bad to h=
ave that variable defined but PHP won't let me get rid of it. Another rea=
son for people to bitch about PHP.

Luckily, we can do something about it, and it happens to be easy.