On 9 June 2017 21:00:48 BST, Niklas Keller <m...@kelunik.com> wrote:
>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.
I already suggested the brace version, and Levi said it would conflict in the
parser: https://externals.io/thread/911#email-15331 I don't know enough about
parsing to comment on what workarounds would be possible.
Regards,
--
Rowan Collins
[IMSoP]
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