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Date: Tue, 29 Jun 2021 10:36:50 +0200
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To: PHP internals <internals@lists.php.net>
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Subject: Re: [RFC] First-class callable syntax
From: nikita.ppv@gmail.com (Nikita Popov)

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On Thu, May 20, 2021 at 2:48 PM Nikita Popov <nikita.ppv@gmail.com> wrote:

> Hi internals,
>
> I'd like to present an RFC for a first-class callable syntax, which is
> intended as a simpler alternative to the partial function application (PFA)
> proposal:
>
> https://wiki.php.net/rfc/first_class_callable_syntax
>
> See the Rationale section for details on how this relates to PFA. Over the
> past week, we've had a lot of discussions on how exactly PFA is supposed to
> work (most of them OTR), and while we seem to have a tentative consensus on
> the correct model to use (which does not match the current RFC), it's clear
> that this feature has turned out more complicated than originally
> anticipated. Joe (who provided the implementation for the PFA RFC) is also
> concerned about the implementation complexity that the final model would
> require.
>
> At least I personally was mainly interested in PFA because it provides a
> first-class callable syntax as a side-effect. This RFC goes back to
> providing *just* that. The syntax is forward-compatible with a future PFA
> proposal though.
>
> Regards,
> Nikita
>

I've updated the RFC to forbid combination with the nullsafe operator, as
well as explicitly mention strict types behavior, as these came up in the
PFA discussion.

I plan to put up this RFC for voting in the event that the PFA proposal
does not get accepted.

Regards,
Nikita

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