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References: <89FF9360-609A-439F-BDBE-B3B4C141E00F@newclarity.net>
 <CAF+90c8A7oWmM45poXj2goghCa00Jz3fiU7ud-aZgVwCfgXOzQ@mail.gmail.com>
 <a74ead4b-868e-8d85-9850-72fcdebc3cd9@gmail.com> <7adfa9fc-3b20-5171-62b6-4c4df57fbe72@gmail.com>
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Date: Wed, 2 Sep 2020 22:58:07 +0200
Message-ID: <CAJpLVh3qEfcFgqnAC95jaf0gyO-3S+=mkSxGQSh4gYoGSR3kuQ@mail.gmail.com>
To: Dik Takken <dik.takken@gmail.com>
Cc: Nikita Popov <nikita.ppv@gmail.com>, Mike Schinkel <mike@newclarity.net>, 
	John Bafford <jbafford@zort.net>, PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="000000000000457a2305ae5ae581"
Subject: Re: [PHP-DEV] Draft RFC: foreach iteration of keys without values
From: olleharstedt@gmail.com (=?UTF-8?Q?Olle_H=C3=A4rstedt?=)

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On Wed, 2 Sep 2020, 21:54 Dik Takken, <dik.takken@gmail.com> wrote:

> On 02-09-2020 21:31, Dik Takken wrote:
> > Even if we decide that it is not worth the trouble for foreach loops,
> > there are other cases where this new syntax can work well. Array
> > destructuring has already been mentioned.
>
> Replying to myself: It just occurred to me that array destructuring
> already allows omitting values:
>
>   [, , $username] = getUserData();
>
> I still do find using void here more clear though, more intentional.
>

Yes, the current syntax lacks explicit intent and looks like a syntax
error. Anything would be better than this, I think. :)


> > Another case is the one where a function intentionally does not use one
> > of the arguments passed to it. This happens easily when using callbacks
> > or when implementing interfaces. A function declaration could look like
> > this:
> >
> >   function foo($arg, void) {}
> >
>
> Given the array destructuring syntax, an alternative syntax might be:
>
>   function foo($arg,)
>
> Again, I would prefer to see void here in stead of a trailing comma. In
> function calls a trailing comma is already allowed and it has a
> completely different meaning, which can be confusing.
>
> Regards,
> Dik Takken
>
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