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Date: Mon, 22 Nov 2021 18:47:29 +0100
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To: =?UTF-8?B?TcOhdMOpIEtvY3Npcw==?= <kocsismate90@gmail.com>
Cc: PHP Internals List <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] [Discussion] Readonly Classes
From: michal.brzuchalski@gmail.com (=?UTF-8?Q?Micha=C5=82_Marcin_Brzuchalski?=)

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Hello M=C3=A1t=C3=A9,

pon., 22 lis 2021 o 17:14 M=C3=A1t=C3=A9 Kocsis <kocsismate90@gmail.com> na=
pisa=C5=82(a):

> Hi Internals,
>
> I'd like to propose adding support for readonly classes:
> https://wiki.php.net/rfc/readonly_classes
>
> The implementation heavily builds on the semantics of the already accepte=
d
> readonly properties RFC (https://wiki.php.net/rfc/readonly_properties_v2)=
,
> basically the only thing I had to implement in the PR are the following:
> - Any declared property of a readonly class is implicitly treated as
> readonly
> - Creation of dynamic properties is forbidden
>

Personally, I'm not convinced at all about this idea.
The read-only property for me is a preliminary step before introducing
full-blown property/field accessors.
Instead of making the whole class readable I'd rather see sort of data
classes similar to record classes in other languages where you get
pass-by-value, built-in object initializer and class composition over
inheritance like Go structs.
But regardless of what I'd love to see this feature, I see no justified use
case.
Therefore I ask if there are any real use cases of it? and if there are
other languages with similar functionality?

Cheers,
Micha=C5=82 Marcin Brzuchalski

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