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Postings from August 2022
"Paul \"LeoNerd\" Evans" <leonerd@leonerd.org.uk> writes:
> On Mon, 29 Aug 2022 16:28:32 -0300
> breno <oainikusama@gmail.com> wrote:
>
>> On Fri, Aug 26, 2022 at 2:30 PM Paul "LeoNerd" Evans
>> <leonerd@leonerd.org.uk> wrote:
>>
>> > Plus I'm open to the idea I may still have missed some useful
>> > abilities. The point of the RFC is not to create a fully-exhaustive
>> > list, but to create the module with enough useful pieces to begin
>> > with, in the hope that more will be added over time as the need
>> > becomes apparent.
>> >
>>
>> Given a subroutine declaration with signatures, I'd love to be able
>> to at least see
>> variable names, "types" and defaults. I am unaware of any way to do
>> it, and I think it
>> would be good for auto-documentation and code completion within
>> editors.
>
> Seeing the names isn't too bad; it's just an inspection of the pad.
>
> Don't forget though that defaults come from expressions, not mere
> values.
>
> sub f($x, $y = lc($x), $z = substr($y, 0, 5)) { ... }
>
> Here, it would be easy to say that:
>
> * min arity is 1
> * max arity is 3
> * parameter names are qw( $x $y $z )
Don't forget that the max arity can be undef, for slurpy args. We'd also
need to expose the arity parity, for surpy hash args. E.g `sub f(%f)`
has even parity, while `sub f($x, %y)` has odd parity, and `sub f($x,
@foo)` has undef parity.
- ilmari
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