> I don't agree that the fn keyword solves the ambiguity problem - it looks
> exactly like a function call.
Right. But it does solve the ambiguity if `fn` is a keyword which is what the
RFC suggests.
> On 18 Jun 2017, at 18:40, Rasmus Schultz <ras...@mindplay.dk> wrote:
>
> I don't agree that the fn keyword solves the ambiguity problem - it looks
> exactly like a function call.
>
> As for the backslash, my honest reaction is, ugh, please, no more
> backslashes - PHP (and every other language) uses backslashes for escaping
> in strings, it already looks pretty awkward in namespaces, this won't help.
>
>
> On Sun, Jun 18, 2017 at 12:58 PM, Ilija Tovilo <ilija.tov...@me.com> wrote:
>
>> The backslash has actually been one of the earlier options if I remember
>> correctly.
>> I definitely prefer the `fn` keyword as it’s only one character more but
>> adds a better visual hint to the arrow function.
>>
>> I’m also not sure why we’d choose a different arrow (`==>` or `~>`) when
>> the ambiguity is solved through either a the backslash or the `fn` keyword.
>>
>>
>>> On 15 Jun 2017, at 17:00, Björn Larsson <bjorn.x.lars...@telia.com>
>> wrote:
>>>
>>> Den 2017-06-15 kl. 15:34, skrev Fleshgrinder:
>>>
>>>> On 6/15/2017 3:29 PM, Björn Larsson wrote:
>>>>> Seems like the constraints on this feature makes it hard to fly, i.e.
>>>>> 1. Not a hackish implementation
>>>>> 2. Non ambiguous syntax
>>>>> 3. Easy to parse & use syntax for the human
>>>>>
>>>>> HackLang then prioritised 2 & 3 making the end-users happy, but
>>>>> had to sacrifise a clean implementation. Any clue if this was a one-
>>>>> time effort once it was done or something with a lot of drawbacks
>>>>> in terms of maintenance, performance, evolution etc?
>>>>>
>>>>> r//Björn
>>>>>
>>>> On Reddit someone proposed the following syntax:
>>>>
>>>> \() => echo 'Hello, World'
>>>>
>>>> It is used by Haskell if I remember correctly and should not be
>>>> ambiguous since `(` is not allowed in names of classes or functions. It
>>>> actually aligns well with functions that are called with a
>>>> fully-qualified name (e.g. `\printf('')`).
>>>>
>>>> Not sure if it would still require hacks though.
>>>>
>>> So applying that one on Sara's example becomes with some
>>> options for the arrow:
>>> 8. $someDict->map(\($v) => $v * 2)->filter(\($v) => $v % 3);
>>> 9. $someDict->map(\($v) ==> $v * 2)->filter(\($v) ==> $v % 3);
>>> 10. $someDict->map(\($v) ~> $v * 2)->filter(\($v) ~> $v % 3);
>>>
>>> Interesting :)
>>>
>>> r//Björn
>>>
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