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Tue, 25 Jun 2024 16:38:08 +0100 (BST)
Date: Tue, 25 Jun 2024 16:38:08 +0100 (BST)
To: Larry Garfield <larry@garfieldtech.com>
cc: php internals <internals@lists.php.net>
Subject: Re: [PHP-DEV] [Early Feedback] Pattern matching
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From: derick@php.net (Derick Rethans)
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On Mon, 24 Jun 2024, Larry Garfield wrote:
> On Thu, Jun 20, 2024, at 5:38 PM, Larry Garfield wrote:
>=20
> * The placement of `is` on `match()` is still an open question.
"The latter is more explicit, and would allow individual arms to be=20
pattern matched or not depending on the presence of is."
Which would make it probably more useful, so I would be in favour of=20
having each arm have the "is".
> * No one has really weighed in on nested patterns for captured=20
> variables. Any thoughts there?
In your example, you have:
if ($foo is Foo{a: @($someA), $b is Point(x: 5, y: @($someY)) }) {
And my brain can't parse that. I would have *no* idea what that means at=20
first sight.
In addition to just normal captured, variables:
"For object patterns (only), if the variable name to extract to is the=20
same as the name of the property, then the property name may be=20
omitted."
This is one I don't like. It adds another syntax, and IMO also makes=20
something less obvious what is happening. Too much magic=E2=84=A2.
So please:
=09if ($p is Point {z: $z, x: 3, y: $y} ) {
And not:
=09if ($p is Point {$z, x: 3, $y} ) {
cheers,
Derick
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