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Subject: Re: [PHP-DEV] Allow hooks in `readonly` promoted properties
Date: Fri, 6 Jun 2025 09:21:37 +0800
In-Reply-To: <6b12585d-199f-4dc6-a557-5e68f59841b7@app.fastmail.com>
Cc: php internals <internals@lists.php.net>
To: Larry Garfield <larry@garfieldtech.com>
References: <B0250A18-3C43-4DFD-9D99-3391C23D9D65@nicksdot.dev>
 <3FBC491A-FE60-4583-A3A2-0A58EC384C88@nicksdot.dev>
 <6b12585d-199f-4dc6-a557-5e68f59841b7@app.fastmail.com>
From: php@nicksdot.dev (Nick)


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Hey Larry,

> On 6. Jun 2025, at 01:06, Larry Garfield <larry@garfieldtech.com> =
wrote:
>> Would this be expected to work? Can interface properties be declared =
`readonly`?
>> interface Cleaned
>> {
>>    public readonly string $clean { get; } // has readonly
>> }
>=20
> Interface properties cannot be declared readonly today:
>=20
> https://3v4l.org/cXgR0
>=20
> Which I think is correct behavior.

Noted, thanks.

> Make sure to include a test based on the "lazy product" example from =
the RFC text.  That's the main sort of use case I'd expect we'd want to =
enable. :-)

Added readonly_lazy.phpt

=E2=80=94

Cheers,
Nick=

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">Hey Larry,<br =
id=3D"lineBreakAtBeginningOfMessage"><div><br><blockquote =
type=3D"cite"><div>On 6. Jun 2025, at 01:06, Larry Garfield =
&lt;larry@garfieldtech.com&gt; wrote:</div><div><blockquote =
type=3D"cite">Would this be expected to work? Can interface properties =
be declared `readonly`?<br>interface =
Cleaned<br>{<br>&nbsp;&nbsp;&nbsp;public readonly string $clean { get; } =
// has readonly<br>}<br></blockquote><br>Interface properties cannot be =
declared readonly today:<br><br><a =
href=3D"https://3v4l.org/cXgR0">https://3v4l.org/cXgR0</a><br><br>Which =
I think is correct behavior.<br></div></blockquote><div><br></div>Noted, =
thanks.</div><div><br><blockquote type=3D"cite">Make sure to include a =
test based on the "lazy product" example from the RFC text. &nbsp;That's =
the main sort of use case I'd expect we'd want to enable. =
:-)<br></blockquote></div><br><div>Added&nbsp;readonly_lazy.phpt</div><div=
><br></div><div>=E2=80=94</div><div><br></div><div>Cheers,</div><div>Nick<=
/div></body></html>=

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