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Re: Assigning an array to a nameref "placeholder"

X-seq: zsh-workers 52618
From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: Zsh hackers list <zsh-workers@xxxxxxx>
Subject: Re: Assigning an array to a nameref "placeholder"
Date: Mon, 26 Feb 2024 18:51:49 -0800
Archived-at: <https://zsh.org/workers/52618>
In-reply-to: <CAH+w=7YPkNSiSC_mp-THHvV-fV_rnbrrhVy6Q00ybeszVPUeyw@mail.gmail.com>
List-id: <zsh-workers.zsh.org>
References: <CAH+w=7YPkNSiSC_mp-THHvV-fV_rnbrrhVy6Q00ybeszVPUeyw@mail.gmail.com>

On Mon, Feb 26, 2024 at 2:18 PM Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx> wrote:
>
> Another one from the ksh93u+ gitlab:
>
> > nameref unsetref; unsetref+=(foo bar). This now produces a "removing nameref attribute" warning before performing the assignment.
>
> I would rather make this an error, but it's probably not difficult
> either way.  Comments?

Incidentally:

% typeset x
% typeset -p x
typeset x=''
% x+=(a b)
% typeset -p x
typeset -a x=( '' a b )

This has been the case for as long as += has been around, as far as I
can tell.  Works this way even with typesettounset, but not if the
parameter was never declared or has been explicitly removed with
"unset".

Follow-Ups:
- [PATCH] Appending an array to a scalar
  - From: Bart Schaefer

References:
- Assigning an array to a nameref "placeholder"
  - From: Bart Schaefer

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