Re: [RFC] Pattern Matching
| From: | Stephen Reay | Date: | Tue, 02 Dec 2025 01:24:43 +0000 |
| Subject: | Re: [RFC] Pattern Matching | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-129498@lists.php.net to get a copy of this message | ||
> On 2 Dec 2025, at 04:45, Larry Garfield <larry@garfieldtech.com> wrote:
>
> Hi folks. Ilija and I would like to present our latest RFC endeavor, pattern matching:
>
> https://wiki.php.net/rfc/pattern-matching
>
> You may note the date on the RFC is from 2020. Yes, we really have had this one in-progress
> for 5 years. :-) (Though it was inactive for many of those years, in fairness.) Pattern matching
> was intended as the next follow up to Enums, as it's a stepping stone toward full ADT support.
> However, we also feel it has enormous benefit on its own for simplifying complex comparisons.
>
> This RFC has been through numerous iterations, including a full implementation rewrite just
> recently that made a number of features much easier. We have therefore included two patterns that
> were previously slated for later inclusion but turned out to be trivially easy in the new approach.
> (Variable pinning and numeric comparison.)
>
> Nonetheless, there are two outstanding questions on which we are looking for feedback.
>
> Naturally given the timing, we will not be calling a vote until at least late January,
> regardless of how the discussion goes. So, plenty of time to express your support. :-)
>
> --
> Larry Garfield
> larry@garfieldtech.com
>
Hi Larry,
Is there a specific reason why less than/etc comparison (and the future scope of ranges) is limited
to numerics?
'A' < 'K' comparisons are already in the language, and range() accepts
string arguments to produce an array of bytes.
Cheers
Stephen