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Date: Tue, 18 Apr 2023 11:27:20 +0200
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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] Clone with
From: andreas@dqxtech.net (Andreas Hennings)

Hello M=C3=A1t=C3=A9, internals,
I have been waiting for this to happen :)
Some feedback

> However, in some cases it would be useful to reference property names as =
expressions, e.g. when one needs to use =E2=80=9Cclone with=E2=80=9D in a f=
oreach loop where the index is the property name and the loop variable is t=
he value to be assigned. This is also possible using a slightly more verbos=
e syntax:

What about argument unpacking?
I don't know if we can combine this with ":" syntax or only with "=3D>".

clone $object with {
  ...$arr,
  ...['a' =3D> 'A', $b =3D> 'B'],
  ...(function () {yield 'x' =3D> 'X';})(),
  c: 'C',  // or
  d =3D> 'D',  // No mixing of ':' and '=3D>', we have to choose one.
}

If we want to go crazy in the future:
(This would require another language feature of inline code blocks
with return value or behaving as generator)

clone $object with {
  ...{
    yield 'a' =3D> 'A';
    yield 'b' =3D> 'B';
  },
  ...{
    return ['c' =3D> 'C'],
  }
}

-- Andreas

On Mon, 17 Apr 2023 at 08:32, M=C3=A1t=C3=A9 Kocsis <kocsismate90@gmail.com=
> wrote:
>
> Hi Everyone,
>
> Quite some time after mentioning the "clone with" construct the first tim=
e
> (at the end of the
> https://wiki.php.net/rfc/write_once_properties#run-time_behaviour section=
),
> finally I managed to create a working implementation for this feature whi=
ch
> would make it possible to properly modify readonly properties
> while simplifying how we write "wither" methods:
> https://wiki.php.net/rfc/clone_with
>
> Regards,
> M=C3=A1t=C3=A9 Kocsis