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Date: Tue, 19 Feb 2013 09:09:08 -0700
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To: Marcello Duarte <mduarte@inviqa.com>
Cc: PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] Short syntax for anonymous functions
From: morrison.levi@gmail.com (Levi Morrison)

There's already been an overwhelming negative reaction to this
particular proposed syntax so I won't belabor the point much.  In
short, this is too similar to block statements and does have BC
issues.

--

IF (and I stress if) we add a a shorter anonymous function syntax I'd
like it to be geared towards one-liners because that's where the
current syntax feels really verbose, especially when you close over
other variables:

    function ($n) use ($m) { return $m * $n; }

Versus one potential option:

    ($value) |$m| => $m * $n;

This syntax is short and expressive at the expense of clarity.
Basically all short-syntax has that trade-off, so I am personally fine
with it. The only other potential problem I see is parsing it; someone
more familiar with PHP's parser would have to verify whether that
would be a problem.