Re: Re: [RFC] Arrow functions / short closures

Den 2019-04-08 kl. 16:06, skrev Nikita Popov:

On Wed, Mar 13, 2019 at 4:56 PM Nikita Popov <nikita.ppv@gmail.com> wrote:

Hi internals, Motivated by the recent list comprehensions RFC, I think it's time we took another look at short closures: https://wiki.php.net/rfc/arrow_functions_v2 This is based on a previous (withdrawn) proposal by Levi & Bob. It uses the syntax

     fn($x) => $x * $multiplier

and implicit by-value variable binding. This example is roughly equivalent to:

     function($x) use($multiplier) { return $x * $multiplier; }

The RFC contains a detailed discussion of syntax choices and binding modes. Regards, Nikita

Heads up: I plan to start voting on this RFC tomorrow if nothing new comes up. Most of the discussion was (as expected) about the choice of syntax. Ultimately I think there are many reasonable choices we can make here, but we should stick to a specific proposal for the purposes of the RFC vote. None of the given arguments convinced me that some other syntax is *strictly* better than the proposed fn($x, $y) => $x*$y -- it's more a matter of some choices being slightly better in one case and slightly worse in another. My personal runner-up would be \($x, $y) => $x*$y, but I suspect that there are some people who are more strongly biased against "sigil salad" than I am... Nikita Hi,

I recall that the perception of the ==> syntax in the Hacklang user community was quite positive. Of course it was implementation difficulties. Are they still to cumbersome in PHP? Personally I prefer that one being more readable or the \ one. Anyway, glad to see that short closures finally is on the road again! r//Björn L