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Date: Wed, 16 Oct 2019 09:54:27 +0200
Message-ID: <CABdc3WpdXSCid0y4tizf8hoXUtSW+rqiDwk82ZGunNtp-ypytA@mail.gmail.com>
To: Kosit Supanyo <webdevxp.com@gmail.com>
Cc: PHP Internals List <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Inline switch as alternative to nested inline conditional
From: michal.brzuchalski@gmail.com (=?UTF-8?Q?Micha=C5=82_Brzuchalski?=)

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Hi Kosit,

=C5=9Br., 16 pa=C5=BA 2019 o 09:41 Kosit Supanyo <webdevxp.com@gmail.com> n=
apisa=C5=82(a):

> Hi Michal
>
> I'had the idea similar to your RFC but instead of using `switch` keyword =
I
> think introducing `when` keyword is better. (as I know a language that us=
es
> this keyword is Kotlin)
>
> $result =3D when ($v) {
>     'foo' =3D> 1,
>     'bar' =3D> 2,
>     'x', 'y', 'z' =3D> 3,
>     default =3D> null,
> };
>
> Above you can see that `when` syntax is more semantic than `switch`. And
> it is easier to implement in parser because it has no statement/expressio=
n
> ambiguity.
>
> But this might not be preferred by BC camps because introducing a new
> keyword might break BC.
> And if `switch` is chosen I still think the syntax should be comma
> separated instead of semicolon separated for consistency with other list
> expressions (array/function call).
>
> $result =3D switch ($v) {
>     case 'foo' =3D> 1,
>     case 'bar' =3D> 2,
>     case 'x', 'y', 'x' =3D> 3,
>     default =3D> null,
> };
>

That's exactly my proposal with commas, see here:
https://wiki.php.net/rfc/switch-expression-and-statement-improvement#switch=
_expression_introduction
Unfortunately, this RFC needs more work cause it mixes switch statement
enhancement with comma-separated list syntax and of switch statement - I
need to split it into two RFC's

This is nice hearing that this idea has an interest.
As soon as the RFC will be split and finished I can start a discussion
thread.

Cheers,
Micha=C5=82 Brzuchalski

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