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Date: Sat, 26 Sep 2015 12:37:33 -0600
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To: Rowan Collins <rowan.collins@gmail.com>
Cc: internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Arrow function expressions in PHP
From: levim@php.net (Levi Morrison)

On Sat, Sep 26, 2015 at 12:31 PM, Levi Morrison <levim@php.net> wrote:
> On Sat, Sep 26, 2015 at 11:07 AM, Rowan Collins <rowan.collins@gmail.com>=
 wrote:
>> On 26/09/2015 17:17, Levi Morrison wrote:
>>>
>>> What concerns do you have about `fn($x) =3D> $x * 2` or `function($x) =
=3D>
>>> $x * 2`? I will be writing a proper RFC later but I wanted to get
>>> discussion going now.
>>
>>
>> If a keyword is required next to the parameters, having the =3D> as a se=
parate
>> token looks a bit weird. It no longer matches other languages, so how ab=
out
>> thinking a bit further outside the box?
>
> Thank you for the feedback. I feel like the rest of what you proposed
> was a bit too far outside of the box. For what it is worth no token
> after the paren is necessary =E2=80=93 you could do `fn($x) $x * 2` (or
> `function($x) $x * 2`). I think this is a case where more syntax
> helps.

Here they are on separate lines so you can see things more clearly:

    $output =3D array_map(function($x) $x * 2, $input);

    $output =3D array_map(function($x) =3D> $x * 2, $input);

I think the arrow helps.