Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:99272
Return-Path: <bjorn.x.larsson@telia.com>
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Delivered-To: mailing list internals@lists.php.net
Received: (qmail 57961 invoked from network); 30 May 2017 18:08:32 -0000
Received: from unknown (HELO lists.php.net) (127.0.0.1)
  by localhost with SMTP; 30 May 2017 18:08:32 -0000
Authentication-Results: pb1.pair.com header.from=bjorn.x.larsson@telia.com; sender-id=unknown
Authentication-Results: pb1.pair.com smtp.mail=bjorn.x.larsson@telia.com; spf=permerror; sender-id=unknown
Received-SPF: error (pb1.pair.com: domain telia.com from 81.236.60.156 cause and error)
X-PHP-List-Original-Sender: bjorn.x.larsson@telia.com
X-Host-Fingerprint: 81.236.60.156 v-smtpout3.han.skanova.net  
Received: from [81.236.60.156] ([81.236.60.156:35336] helo=v-smtpout3.han.skanova.net)
	by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP
	id 38/12-43873-E15BD295 for <internals@lists.php.net>; Tue, 30 May 2017 14:08:30 -0400
Received: from [192.168.7.8] ([195.198.188.252])
	by cmsmtp with SMTP
	id FlZCdLxCnARCaFlZCdYebz; Tue, 30 May 2017 20:08:27 +0200
To: Levi Morrison <levim@php.net>
Cc: Sara Golemon <pollita@php.net>, PHP internals <internals@lists.php.net>
References: <CAFMT4Nrt7XPMnELoAGLu=sSRCTCtzPCTaSE8HJjKfHjDXOXU_A@mail.gmail.com>
 <97bb5051-6413-b78a-e981-ad8858caec4c@gmail.com>
 <8d4ee559-1ad2-4d65-ae4f-207e59f056e3@Spark>
 <61DC1C28-CAF2-45F4-8D9F-A66BEA2E90B1@gmail.com>
 <3942113e-f83a-444f-bbc2-462c70d67c65@Spark>
 <20db9b97-5313-057d-db56-920ccb758558@telia.com>
 <CAFMT4Noi3s1eB9Og-c3P=wnz646G=eeSmCASVF1q_JM-SVvZKA@mail.gmail.com>
 <877970f0-b22d-a8b9-9ad4-6fc9139a9b34@telia.com>
 <CAFMT4Nqyhv8-XaC7L8khHjGKRMW677AWeH8red2ogmCEYV-mSg@mail.gmail.com>
 <c0971e49-3581-999c-4f8d-d9c3b9bce0f6@telia.com>
 <CAFMT4NqxxaXXb9AOw5OPzu91EL7yK_FqA_qCbPfccnLW4b63wg@mail.gmail.com>
Message-ID: <513cf5b4-34f4-a81a-83e8-f8d1fd6c0a19@telia.com>
Date: Tue, 30 May 2017 20:08:29 +0200
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101
 Thunderbird/52.1.1
MIME-Version: 1.0
In-Reply-To: <CAFMT4NqxxaXXb9AOw5OPzu91EL7yK_FqA_qCbPfccnLW4b63wg@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: sv
X-CMAE-Envelope: MS4wfII+i2GKW4T8Bu7ZEJT55ZSqHyGMV4lN75FwSk7NsTn8M6TbGwkEgzi+HKngnMUSpnVQZXiUJJfInWrnzFl9PV6xGt9y/dy8bKTh1RHp3pAsaLAx+HTO
 6CA4J7cwv04z/kD57RtQIzcvFpEtjzmHVg3B35L3a9I121zDTW3rz7Y9NDjFGaci6O5kN6Gts9LkVSzaIO59AuXnbiYN6uE3EprC4dWOfmnK3m1NFPjmud7C
Subject: Re: [PHP-DEV] [RFC][Discuss] Arrow Functions
From: bjorn.x.larsson@telia.com (=?UTF-8?Q?Bj=c3=b6rn_Larsson?=)

Den 2017-05-30 kl. 17:09, skrev Levi Morrison:

>> Well, my preference would be for alternative 3. Not in favour of 2 & 4.
>> Nr 1 not so sure about and for nr 5, maybe tweak it to:
>> - [](params) ==> expr    // binds no values
>> - [=](params) ==> expr    // binds by value
>> - [&](params) ==> expr    // binds by reference
> Can you explain why you want a longer arrow?
To improve readability and also make it less ambiguous for
the programmer / reader of code. Also I think it stands out
more in code reviews and if one by mistake looses [], would
it then generate a parsing error or be treated as valid syntax.

Maybe also a bit simpler to implement then "[]() => expr"
in the PHP engine, but I'm guessing on this one though...
>> Leaving out [] could also be a default:
>> - (params) ==> expr    // binds no values
> Or maybe that is why?
Yup, one reason!
>> I presume then that the options discussed earlier "|params| => expr"
>> and "lamda(params) => expr" are of the table.
> The `|params| => expr` syntax is off the table, yes. I don't remember
> anyone taking the `lambda(params) => expr` suggestion seriously; my
> apologies if I'm simply remembering this incorrectly.
>
I recall some liking it (like me ;-) since it's a clearer signal
then fn(params) that we have something different here.

r//Björn