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Date: Sat, 17 Jul 2021 17:57:53 +0300
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To: Andreas Leathley <a.leathley@gmx.net>
Cc: PHP Internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Readonly properties - immutability by default
From: zsidelnik@gmail.com (Eugene Sidelnyk)

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I don't think the way it is going to be realeased is elegant solution

On Sat, Jul 17, 2021, 2:47 PM Andreas Leathley <a.leathley@gmx.net> wrote:

> On 16.07.21 09:06, Nikita Popov wrote:
> > We cannot make properties readonly by default, because that would be a
> > major backwards compatibility break.
> >
> > If you're going for brevity, something you can do is omit the visibility
> > specifier, as it is public by default. "readonly int $prop" works.
>
> Would it be possible to adapt constructor property promotion to support
> this (as far as I tell, it currently does not)? Namely:
>
> class A {
>      public function __construct(
>          readonly int $id,
>      ) {
>      }
> }
>
> According to the constructor property promotion RFC, the promotion only
> happens when public, private and protected is used for an constructor
> parameter. With the readonly RFC accepted, it would make sense to also
> do constructor property promotion when readonly is used, to avoid the
> explicit public, because readonly would also clearly define the
> parameter as not-only-a-parameter.
>
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>

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