Furthermore there are intrinsic ambiguities:
For example:
&1
Is that a function that returns 1 or is it a user error which forgot the
outermost &?
And this example:
&num/2
Is that num divided by 2 or an attempt to capture the num function of arity
2?
So the reason why the capture operator requires at least one (consecutive)
argument is to make the code clearer. And sure, the compiler could solve
those, but the ambiguity will always be there for users reading the code.
*José Valim*
www.plataformatec.com.br
Skype: jv.ptec
Founder and Director of R&D
On Fri, Feb 15, 2019 at 12:05 PM Andrea Leopardi <an.leopa...@gmail.com>
wrote:
> Hey Mario,
>
> The capture operator today already has a few forms (arity or arguments)
> and I think it would be better to keep it simple and not add more specific
> behaviors, especially considering this would be done to save just a handful
> of characters.
>
> Andrea
>
> On Fri, 15 Feb 2019 at 11:56, Mário Guimarães <
> mario.luis.guimar...@gmail.com> wrote:
>
>> Where is
>>
>> fn () -> M.fun("value")
>>
>> it should be
>>
>> fn () -> M.fun("value") end
>>
>> or
>>
>> fn -> M.fun("value") end
>>
>>
>>
>> quinta-feira, 14 de Fevereiro de 2019 às 16:46:18 UTC, Mário Guimarães
>> escreveu:
>>>
>>> Hello,
>>>
>>> Elixir could support function captures without the need for any
>>> argument, so that of instead of writing
>>>
>>> fn () -> M.fun("value")
>>>
>>> end one could write
>>>
>>>
>>> &M.fun("value")
>>>
>>> Today the later returns an error like
>>>
>>> ** (CompileError) iex:28: invalid args for &, expected an expression in
>>> the format of &Mod.fun/arity, &local/arity or a capture containing at
>>> least one argument as &1, got: M.fun("value"))
>>>
>>> Thanks
>>> Mário
>>>
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> Andrea Leopardi
> an.leopa...@gmail.com
>
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