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Re: Shouldn't readonly (-r) prevent type changes?

X-seq: zsh-workers 55037
From: Oliver Kiddle <opk@xxxxxxx>
To: Philippe Altherr <philippe.altherr@xxxxxxxxx>
Cc: Zsh hackers list <zsh-workers@xxxxxxx>
Subject: Re: Shouldn't readonly (-r) prevent type changes?
Date: Sat, 25 Jul 2026 23:57:13 +0200
Archived-at: <https://zsh.org/workers/55037>
In-reply-to: <CAGdYchuy8pgfohz0aqeV60e0Yu8Z_548n8jD20b86NHtZtoE5Q@mail.gmail.com>
List-id: <zsh-workers.zsh.org>
References: <CAGdYchuy8pgfohz0aqeV60e0Yu8Z_548n8jD20b86NHtZtoE5Q@mail.gmail.com>

Philippe Altherr wrote:
> Bash seems to forbid all type changes for read-only parameters, while ksh
> prevents most, sometimes without any error message, and allows some like
> "typeset -r -i var; typeset -a var", which creates a read-only array of
> integers.

I think ksh treats all variables as being arrays so thatisn't a type
conversion. It was already a one element array.

Oliver

Follow-Ups:
- Re: Shouldn't readonly (-r) prevent type changes?
  - From: Mark J. Reed

References:
- Shouldn't readonly (-r) prevent type changes?
  - From: Philippe Altherr

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