From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-workers@zsh.org
Subject: Re: One possible answer to typeset vs. unset
Date: Wed, 2 Dec 2020 18:18:59 +0100 [thread overview]
Message-ID: <X8fMgx5uY0atuMZK@zira.vinc17.org> (raw)
In-Reply-To: <CAH+w=7Zh8URUiLF2n1x-ZrvKO+=JC8wf+n692sRsFTRbkJrzXw@mail.gmail.com>
On 2020-11-28 11:49:12 -0800, Bart Schaefer wrote:
> The typeset -AEFHLRTZailux options are applied upon the first
> assignment to the variable. Explicit unset before the first assignment
> discards all of those properties. If any option is applied to an
> existing name, historic behavior is unchanged.
OK for the second sentence (about unset), but I don't understand the
first sentence. Could you explain the following behavior?
zira% ./zsh -c 'typeset -i x; echo $x; echo $((x+3)); unset x; echo $((x+3));'
3
3
zira% ./zsh -c 'typeset -E x; echo $x; echo $((x+3)); unset x; echo $((x+3));'
3.
3
zira%
Why do I get "3." if the -E option isn't supposed to be applied yet?
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
next prev parent reply other threads:[~2020-12-02 17:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-28 19:49 Bart Schaefer
2020-11-28 20:00 ` Bart Schaefer
2020-11-28 20:21 ` Bart Schaefer
2020-12-01 8:54 ` Felipe Contreras
2020-12-03 21:19 ` Bart Schaefer
2020-12-04 11:04 ` Felipe Contreras
2020-12-04 15:49 ` Bart Schaefer
2020-12-04 19:47 ` Bart Schaefer
2020-12-05 0:22 ` Bart Schaefer
2020-12-05 0:28 ` Bart Schaefer
2020-12-05 0:51 ` Bart Schaefer
2020-12-05 22:17 ` Bart Schaefer
2020-12-23 23:00 ` Felipe Contreras
2020-12-02 17:18 ` Vincent Lefevre [this message]
2020-12-02 18:03 ` Bart Schaefer
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