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Date: Mon, 7 Sep 2015 18:30:23 +0100
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Subject: Re: [PHP-DEV] [RFC] [Discussion] Short Closures
From: rowan.collins@gmail.com (Rowan Collins)

Levi Morrison wrote on 07/09/2015 17:56:
>      function reduce ($initial) ~> $fn ~> $input ~> {
>          $accumulator = $initial;
>          foreach ($input as $value) {
>              $accumulator = $fn($accumulator, $value);
>          }
>          return $accumulator;
>      }

Hm, this is an interesting idea. I actually think the case for it is 
*stronger* if ~> was considered special syntax for trivial functions, 
because if not, there's this odd hybrid, which we probably wouldn't want 
to allow:

function weird_declaration($bar) ~> {
     any();
     code();
     here();
}

Whereas this declaration might be quite useful:

function double($x) ~> $x * 2;

I realise the syntax was only an example, but this way there'd be a nice 
consistency between named and anonymous functions.

I think that would leave your example as:

function reduce ($initial) ~> $fn ~> function($input) use ( $initial, $fn) {
	$accumulator = $initial;
	foreach ($input as $value) {
		$accumulator = $fn($accumulator, $value);
	}
	return $accumulator;
}


Regards,
-- 
Rowan Collins
[IMSoP]