Re: [RFC]Discuss] Syntax for Arrow Functions
| From: | Björn Larsson | Date: | Sat, 10 Jun 2017 08:05:43 +0000 |
| Subject: | Re: [RFC]Discuss] Syntax for Arrow Functions | ||
| References: | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-99473@lists.php.net to get a copy of this message | ||
Den 2017-06-09 kl. 15:44, skrev Sara Golemon:
On Fri, Jun 9, 2017 at 7:23 AM, Björn Larsson <bjorn.x.larsson@telia.com> wrote:more parameters I find the parenthesis less disturbing like. - $someDict->map(($v, $y) ==> $v * 2 + $y)->filter(($v, $y) ==> $v % 3 - $y); Btw, do you think there is a way around the hacky implementation, given that PHP now has a new and shining engine? r//BjörnIf I take the liberty in using the example above on our option list: 1. $someDict->map(fn($v) => $v * 2)->filter(fn($v) => $v % 3); 2. $someDict->map(function($v) => $v * 2)->filter(function($v) => $v % 3); 3. $someDict->map($v ==> $v * 2)->filter($v ==> $v % 3);Something else which really pops in these examples is the effect of not needing to use parentheses when embedding a single-arg short lambda. 3 and 6 in your list read cleaner to me (due to the lack of parenthesis clutter). Sadly ~> has the same hacky implementation issues as ==>, but I think that shows a little bit of why the HackLang team decided the messy lexer was worth the clearer syntax. Yup, totally agree on that one. It improves redability and when you have4. $someDict->map(($v) => $v * 2)->filter(($v) => $v % 3); //Ambiguous 5. $someDict->map([]($v) => $v * 2)->filter([]($v) => $v % 3); Old proposals: 6. $someDict->map($v ~> $v * 2)->filter($v ~> $v % 3); 7. $someDict->map(lambda($v) => $v * 2)->filter(lambda($v) => $v % 3);