Re: [Perl/perl5] 502da7: make /p a no-op

You sure this doesn't make while /g matches go quadratic? Lastly I checked
/p still matters for while/g -- the COW stuff doesn't always kick in: Not
every string can be COWed. Iirc strings returned from <>/readline aren't
COWed.

Every time people proposed removing /p when I have  checked while /g it has
been broken.

Yves

Yves

---
perl -Mre=debug -e "/just|another|perl|hacker/"

On Thu, 12 Feb 2026, 16:39 Philippe Bruhat (BooK) via perl5-changes, <
[email protected]> wrote:

>   Branch: refs/heads/book/p-modifier-is-a-noop
>   Home:   https://github.com/Perl/perl5
>   Commit: 502da7e0422c94f36fda5e70416c4f92adca225e
>
> https://github.com/Perl/perl5/commit/502da7e0422c94f36fda5e70416c4f92adca225e
>   Author: Philippe Bruhat (BooK) <[email protected]>
>   Date:   2026-02-12 (Thu, 12 Feb 2026)
>
>   Changed paths:
>     M regexec.c
>     M t/re/reg_pmod.t
>
>   Log Message:
>   -----------
>   make /p a no-op
>
> meaning that a copy of the matched string is always preserved,
> regardless of usage of the /p modifier
>
> Closes GH #24147
>
>
>   Commit: 38f00a1fb6754d42ee8282106fa99bf51defc263
>
> https://github.com/Perl/perl5/commit/38f00a1fb6754d42ee8282106fa99bf51defc263
>   Author: Philippe Bruhat (BooK) <[email protected]>
>   Date:   2026-02-12 (Thu, 12 Feb 2026)
>
>   Changed paths:
>     M pod/perlreref.pod
>     M pod/perlvar.pod
>
>   Log Message:
>   -----------
>   document the new behaviour of /p
>
>
>   Commit: 432b96a3328e773407f8c31a9fd224b3b0606f1a
>
> https://github.com/Perl/perl5/commit/432b96a3328e773407f8c31a9fd224b3b0606f1a
>   Author: Philippe Bruhat (BooK) <[email protected]>
>   Date:   2026-02-12 (Thu, 12 Feb 2026)
>
>   Changed paths:
>     M pod/perldelta.pod
>
>   Log Message:
>   -----------
>   perldelta entry about the neutering of /p
>
>
> Compare: https://github.com/Perl/perl5/compare/bc4893f14393...432b96a3328e
>
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