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From: Bart Schaefer <schaefer@brasslantern.com>
To: chris0e3@gmail.com
Cc: zsh-workers@zsh.org
Subject: Re: [BUG] `$match` is haunting my regex’s trailing, optional, capture
Date: Fri, 8 Dec 2023 22:23:10 -0800	[thread overview]
Message-ID: <CAH+w=7b8tF16GhZvpcF8urVV-tAAY6DHFRwp=7QNUfA27QxJhA@mail.gmail.com> (raw)
In-Reply-To: <A231AE39-13BE-487E-AE31-AF35F2891A8C@gmail.com>

On Fri, Dec 8, 2023 at 9:14 PM <chris0e3@gmail.com> wrote:
>
>   setopt rematch_pcre
>   [[ 'REQUIRE. OPT' =~ 'REQUIRE.(\s*OPT)?' ]] && printf '\tA. ‹%s›\n' $match
>   [[ 'REQUIRE.'     =~ 'REQUIRE.(\s*OPT)?' ]] && printf '\tB. ‹%s›\n' $match

Aside, you should use e.g. "$match[@]" there (including the quotes) or
you'll be surprised when there is more than one back reference.

> It looks like: if there is a match, but no captures are matched then `$match` is not cleared.

The output of your latter example is certainly not consistent with e.g.

 setopt extendedglob
 [[ 'REQUIRE.' = (#b)REQUIRE.(*OPT)(#c0,1) ]] && printf '\tB. ‹%s›\n' $match

And I can reproduce your example with the most recent git checkout, as
well.  Oliver recently updated to pcre2, so if a patch appears, you
may be on your own to backport it.


  reply	other threads:[~2023-12-09  6:23 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-09  5:14 chris0e3
2023-12-09  6:23 ` Bart Schaefer [this message]
2023-12-09 20:54   ` [PATCH?] " Bart Schaefer
2023-12-11 23:49     ` Oliver Kiddle
2023-12-12  1:38       ` Bart Schaefer
2024-01-25 22:14         ` Oliver Kiddle

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