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Date: Sun, 2 Feb 2025 14:40:03 +0100
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Subject: Re: [PHP-DEV] Empty subject in match and switch constructions
To: PHP internals <internals@lists.php.net>
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From: tovilo.ilija@gmail.com (Ilija Tovilo)

Hi Dmitrii

On Sun, Feb 2, 2025 at 1:05=E2=80=AFPM Dmitry Derepko <xepozzd@gmail.com> w=
rote:
>
> I=E2=80=99m thinking about making match (true) and switch (true) be more =
lightweight by removing the subject =E2=80=9C(true)=E2=80=9D and making mat=
ching =E2=80=9Ctrue condition=E2=80=9D by default.
> So $var =3D match (true) { =E2=80=A6 } can be used as $var =3D match { =
=E2=80=A6 }.

There's an old RFC draft for this that never went anywhere. I believe
the feedback was mixed, but there's no way to know how it would have
turned out since it never went into voting. Given it's inactive, it
should be ok for you to take over.

https://wiki.php.net/rfc/short-match
https://externals.io/message/112496

> `when` construction is overwhelming, but some features are totally handy,=
 such as checking for class of the subject:
> when (obj) {
>   is Class1 -> =E2=80=A6
>   is Class2 -> =E2=80=A6
>   else -> ...
> }
>
> Which was implemented by Ilija Tovilo in: https://github.com/php/php-src/=
compare/master...iluuu1994:pattern-matching

This is a really old draft. The RFC itself is mostly up to date. The
implementation is still WIP.

https://wiki.php.net/rfc/pattern-matching

Ilija