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Date: Tue, 6 Jun 2023 15:05:55 +0100
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Subject: Re: [PHP-DEV] RFC [Discussion]: Closure self-reference
From: ttijhof@wikimedia.org (Timo Tijhof)

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On Mon, 5 Jun 2023 at 05:09, Alexandru P=C4=83tr=C4=83nescu <drealecs@gmail=
.com>
wrote:

>
> How about a keyword/variable to the current executing closure that works
> also if you refactor it to a function or a method.
> Just like self for a class we can have a keyword like fnself [..]


This seems quite appealing to me, and is imho  more idiomatic and ergonomic
than the other proposals.

Keywords naturally avoid conflicts with user variables, and remove the need
for each author to pick a name for their closure and the inevitable
preferences, automation, and disagreements that will arise from that.

On the other hand, we've seen from *match()* how disruptive a new keyword
can be as they clash as well, with function names instead of variables.
Building on an existing keyword or soft-reserved naming convention would
avoid that.

In terms of global constants, we have double underscores which is in the
proposal already but feels unnatural as others have indicated already.

In terms of local constants, I believe we authors generally prefer
uppercase names, and we have one built-in special constant that's
lowercase: *self::class*.

Perhaps *self::fn* or *self::callee*?

The latter borrows the closure terminology form JavaScript
(arguments.callee, which does the same thing).

--
Timo Tijhof
https://timotijhof.net/

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