Re: [RFC] Arrow functions / short closures

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 This is based on a previous (withdrawn) proposal by Levi & Bob.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