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Date: Wed, 10 Aug 2022 22:30:42 +0100
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Subject: Re: [PHP-DEV] Re: [Concept] Extension methods
From: rowan.collins@gmail.com (Rowan Tommins)

On 10 August 2022 18:52:58 BST, Alex Wells <autaut03@gmail=2Ecom> wrote:
>Thanks for explaining it better than I did=2E
>
>Regarding the implementation, that was roughly what I was thinking=2E
>
>But can't we put extension methods second, after real methods but before
>__call? As far as I understand, the reason to put it after __call is to
>avoid a performance penalty on __call calls, but this would mean extensio=
n
>methods are not possible for classes that implement __call=2E Not a huge
>deal, but a thing to consider=2E


To be honest, I put them in that order more for "purity" reasons: if they =
come before __call, they can change the existing behaviour of the class, by=
 defining an extension method with the same name as a "virtual" method impl=
emented with __call=2E That then becomes a very different feature=2E

If there was a way for __call to signal "no implementation for this method=
 name", you could look for extension methods if that was returned; but at t=
he moment, a class implementing __call is assumed to reserve *all* method n=
ames=2E

I suppose a related question is whether __call itself could be implemented=
 by an extension method=2E I would suggest no, to keep things simpler=2E


(Aside: Reminder that convention on this list is to "bottom-post": quote t=
he part of message you're replying to, then add your text below=2E)

--=20
Rowan Tommins
[IMSoP]