From: Bart Schaefer <schaefer@brasslantern.com>
To: Zsh hackers list <zsh-workers@zsh.org>
Subject: Re: [PATCH (not final)] (take three?) unset "array[$anything]"
Date: Wed, 2 Jun 2021 23:43:50 -0700 [thread overview]
Message-ID: <CAH+w=7ZLycMBeftu+L3TXktg0812uVp+Nya5QJUH9UqQ9KWy3w@mail.gmail.com> (raw)
In-Reply-To: <20210603060546.lvai62egrinwrbni@chazelas.org>
On Wed, Jun 2, 2021 at 11:05 PM Stephane Chazelas <stephane@chazelas.org> wrote:
>
> 2021-06-02 19:04:01 -0700, Bart Schaefer:
> > On Wed, Jun 2, 2021 at 8:59 AM Bart Schaefer <schaefer@brasslantern.com> wrote:
> > What I realized is that for any unset of an array element, the closing
> > bracket must always be the last character of the argument.
>
> D'oh, I had assumed that had been like that in the beginning
No ... it used to do skipparens() which would always stop too soon if
there was an embedded ']', and I changed it to parse_subscript() to
make '\]' possible.
> I think I'd be in favour of breaking these workarounds on the
> ground that it would fix far more existing script (that just do
> unset "hash[$key]") than it would [break].
See my follow-up message comparing variations.
> There's also the question of what to do with
... a bunch of things that aren't documented to work with associative
array elements but accidentally do ...
> My suggestion of making unset a keyword so that unset hash[$key]
> works as expected while unset "hash[$key]" works as before
> won't fly as we can't possibly make all builtins that take
> lvalues keywords.
Strictly speaking they don't take lvalues, they take shell parameter
names and use them as lvalues.
> We can't really expect people to carry on doing:
>
> () { set -o localoptions +o multibyte -o extendedglob
> unset "hash[${key//(#m)[][\\()\`]/\\$MATCH}]"; }
There's already an unreleased change for the (*) parameter flag to
locally enable extendedglob:
unset "hash[${(*)key//(#m)[][\\()\`]/\\$MATCH}]"; }
but still unreasonable.
next prev parent reply other threads:[~2021-06-03 6:44 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 21:10 regexp-replace and ^, word boundary or look-behind operators Stephane Chazelas
2019-12-16 21:27 ` Stephane Chazelas
2019-12-17 7:38 ` Stephane Chazelas
2019-12-17 11:11 ` [PATCH] " Stephane Chazelas
2019-12-18 0:22 ` Daniel Shahaf
2019-12-18 8:31 ` Stephane Chazelas
2020-01-01 14:03 ` [PATCH v2] " Stephane Chazelas
2021-04-30 6:11 ` Stephane Chazelas
2021-04-30 23:13 ` Bart Schaefer
2021-05-05 11:45 ` [PATCH v3] regexp-replace and ^, word boundary or look-behind operators (and more) Stephane Chazelas
2021-05-31 0:58 ` Lawrence Velázquez
2021-05-31 18:18 ` Bart Schaefer
2021-05-31 21:37 ` [PATCH] (?) typeset array[position=index]=value Bart Schaefer
2021-06-01 5:32 ` Stephane Chazelas
2021-06-01 16:05 ` Bart Schaefer
2021-06-02 2:51 ` [PATCH] (take two?) typeset array[position=index]=value / unset hash[$stuff] Bart Schaefer
2021-06-02 10:06 ` Stephane Chazelas
2021-06-02 14:52 ` Bart Schaefer
2021-06-02 16:02 ` Stephane Chazelas
2021-06-02 9:11 ` [PATCH] (?) typeset array[position=index]=value Stephane Chazelas
2021-06-02 13:34 ` Daniel Shahaf
2021-06-02 14:20 ` Stephane Chazelas
2021-06-02 15:59 ` Bart Schaefer
2021-06-03 2:04 ` [PATCH (not final)] (take three?) unset "array[$anything]" Bart Schaefer
2021-06-03 2:42 ` Bart Schaefer
2021-06-03 6:12 ` Bart Schaefer
2021-06-03 8:54 ` Peter Stephenson
2021-06-03 13:13 ` Stephane Chazelas
2021-06-03 14:41 ` Peter Stephenson
2021-06-04 19:25 ` Bart Schaefer
2021-06-05 18:18 ` Peter Stephenson
2021-06-09 23:31 ` Bart Schaefer
2021-06-13 16:51 ` Peter Stephenson
2021-06-13 18:04 ` Bart Schaefer
2021-06-13 19:48 ` Peter Stephenson
2021-06-13 21:44 ` Bart Schaefer
2021-06-14 7:19 ` Stephane Chazelas
2021-06-03 18:12 ` Bart Schaefer
2021-06-04 8:02 ` Stephane Chazelas
2021-06-04 18:36 ` Bart Schaefer
2021-06-04 20:21 ` Stephane Chazelas
2021-06-05 0:20 ` Bart Schaefer
2021-06-05 17:05 ` Stephane Chazelas
2021-06-10 0:14 ` Square brackets in command position Bart Schaefer
2021-06-03 6:05 ` [PATCH (not final)] (take three?) unset "array[$anything]" Stephane Chazelas
2021-06-03 6:43 ` Bart Schaefer [this message]
2021-06-03 7:31 ` Stephane Chazelas
2021-06-10 0:21 ` [PATCH] (?) typeset array[position=index]=value Bart Schaefer
2021-06-05 4:29 ` Mikael Magnusson
2021-06-05 5:49 ` Bart Schaefer
2021-06-05 11:06 ` Mikael Magnusson
2021-06-05 16:22 ` Bart Schaefer
2021-06-18 10:53 ` Mikael Magnusson
2024-03-08 15:30 ` [PATCH v3] regexp-replace and ^, word boundary or look-behind operators (and more) Stephane Chazelas
2024-03-09 8:41 ` [PATCH v5] " Stephane Chazelas
2024-03-09 9:21 ` MBEGIN when =~ finds bytes inside characters (Was: [PATCH v5] regexp-replace and ^, word boundary or look-behind operators (and more).) Stephane Chazelas
2024-03-09 13:03 ` [PATCH v3] regexp-replace and ^, word boundary or look-behind operators (and more) Stephane Chazelas
2024-03-10 19:52 ` [PATCH v6] " Stephane Chazelas
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