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Date: Mon, 19 Jun 2017 08:43:01 -0600
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To: Ilija Tovilo <ilija.tovilo@me.com>
Cc: Rasmus Schultz <rasmus@mindplay.dk>, =?UTF-8?Q?Bj=C3=B6rn_Larsson?= <bjorn.x.larsson@telia.com>, 
	Fleshgrinder <php@fleshgrinder.com>, PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC]Discuss] Syntax for Arrow Functions
From: levim@php.net (Levi Morrison)

On Sun, Jun 18, 2017 at 1:44 PM, Ilija Tovilo <ilija.tovilo@me.com> wrote:
> Sorry, I wasn=E2=80=99t aware of that.
>
> What do you think of the Ruby/Rust style syntax that Levi proposed a whil=
e back?
>
> $someDict
>     ->map(|$v| $v * 2)
>     ->filter(|$v| $v % 3);
>
> This one has a few advantages:
>
> 1. It has syntax (a lot of) developers are already familiar with
> 2. It has no ambiguities and is fully backward compatible
> 3. It=E2=80=99s the shortest of all options available (two `|` characters=
 and one space)

We determined that the arrow between the parameters and the expression
would still be required. Given this limitation I think this syntax is
seviceable:

    $someDict
        ->map({$v =3D> $v * 2})
        ->filter({$v =3D> $v % 3});

Sometime this week I intend to start another thread that narrows us
down to two choices.