> On 10 Jun 2017, at 15:19, Björn Larsson <bjorn.x.lars...@telia.com> wrote:
>
> Den 2017-06-09 kl. 22:00, skrev Niklas Keller:
>> 2017-06-09 15:44 GMT+02:00 Sara Golemon <poll...@php.net>:
>>
>>> On Fri, Jun 9, 2017 at 7:23 AM, Björn Larsson <bjorn.x.lars...@telia.com>
>>> wrote:
>>>> If 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);
>>>> 4. $someDict->map(($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);
>>>>
>>> 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.
>>
>> Another possible syntax (dunno whether this has already been suggested
>> on-list):
>>
>> $function = { $x => 2 * $x };
>> $function = { ($x) => 2 * $x };
>> $function = | $x => 2 * $x |;
>> $function = | ($x) => 2 * $x |;
>>
>> Nikita and Levi prefer it with parenthesis, I prefer it without, because I
>> think it's unnecessary clutter.
>>
>> A reason to use | ... | instead of { ... } would be to allow future object
>> literals.
>>
> Applying that to Sara's example becomes:
> 8. $someDict->map({$v => $v * 2})->filter({$v => $v % 3});
> 9. $someDict->map(|$v => $v * 2|)->filter(|$v => $v % 3|);
>
> I also find that parenthesis makes it cluttered.
> $someDict->map({($v) => $v * 2})->filter({($v) => $v % 3});
>
> Cheers //Björn
>
>
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I find it quite odd that people are claiming paren’s around 0 arguments is
‘clutter’, but curly braces or pipes around the entire thing is somehow not
clutter. While I understand there are small differences like implicit return
and automatic capturing, having such wildly different syntax to a regular still
doesn’t make much sense to me.
Also, while object literals aren’t in php right now, I would imagine most
developers would mentally parse that syntax as an object literal with a
variable used for the key.
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