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Date: Wed, 26 Jun 2013 13:32:10 +0200
To: Nikita Popov <nikita.ppv@gmail.com>, Patrick ALLAERT
 <patrickallaert@php.net>
Cc: PHP internals <internals@lists.php.net>
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Subject: 
 =?UTF-8?Q?Re=3A_=5BPHP-DEV=5D_Announcing_RFC_'Anonymous_Catches'?=
From: joost.koehoorn@gmail.com (Joost Koehoorn)

On 26 juni 2013 at 08:50:55, Patrick ALLAERT (patrickallaert=40php.net) w=
rote:
2013/6/25 Nikita Popov <nikita.ppv=40gmail.com>:=C2=A0
> but I'm against the generic catch=7B=7D statement.=C2=A0

I'm sharing Nikita's opinion, with the difference of a bit more=C2=A0
enthusiasm on leaving off the variable as it could make it more=C2=A0
obvious that there is no intention in using the variable, and that no=C2=A0=

memory should be kept for it. This might be better than doing:=C2=A0

try =7B=C2=A0
=5B...=5D=C2=A0
=7D catch (Exception =24ignore) =7B=C2=A0
unset(=24ignore);=C2=A0
=7D=C2=A0

=5B...=5D=C2=A0

However, I see other cases where a variable is technically required=C2=A0=

but not used:=C2=A0

abstract class AbstractPrinter =7B=C2=A0
abstract public function print(=24message);=C2=A0
=7D=C2=A0

class Printer extends AbstractPrinter =7B=C2=A0
public function print(=24message) =7B=C2=A0
echo =24message;=C2=A0
=7D=C2=A0
=7D=C2=A0

class BlackholePrinter extends AbstractPrinter =7B=C2=A0
public function print(=24message) =7B=C2=A0
=7D=C2=A0
=7D=C2=A0

In the previous example, =24message is not =22used=22 in=C2=A0
BlackholePrinter::print() (as well as in AbstractPrinter::print()).=C2=A0=

How do you intend to make that consistent with: catch(Exception) =3F=C2=A0=


Patrick


Your inheritance example is something that I do not have a good solution =
for (I don't think there is one) but with Exceptions it's different, beca=
use there the solution is obvious, unambiguous and expected.

That it also happens to be easy to implement is good to know, it means th=
at the effects of this change are totally obvious (because only ONE opcod=
e has to be changed, so there is only an effect on this ONE opcode, other=
 code is not affected in any way, that's good to know).