From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-workers@zsh.org
Subject: Re: behavior of test true -a \( ! -a \)
Date: Sat, 23 Mar 2024 23:20:36 +0100 [thread overview]
Message-ID: <20240323222036.GE164665@qaa.vinc17.org> (raw)
In-Reply-To: <CAH+w=7bAB+cx-f_qBMKoec=Hdyj_s_pRUeiE8K8wyr_ig1rDeQ@mail.gmail.com>
On 2024-03-23 14:48:36 -0700, Bart Schaefer wrote:
> I'd therefore argue that it's actually
>
> % test \( ! -a \)
>
> that is wrong: It should be complaining of a missing close paren,
> rather than magically reverting to treating "!" as "not" (and also
> "-a" as a plain string). It's entirely dependent on the count of
> arguments rather than on treating parens as tokens.
POSIX specifies what happens with up to 4 arguments. The idea is to
interpret the operators in a way so that the expression is meaningful
rather than having an incorrect syntax.
--
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:[~2024-03-23 22:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 10:07 Vincent Lefevre
2024-03-21 10:28 ` Peter Stephenson
2024-03-21 11:04 ` Vincent Lefevre
2024-03-21 11:29 ` Peter Stephenson
2024-03-21 12:18 ` Vincent Lefevre
2024-03-21 12:25 ` Peter Stephenson
2024-03-21 19:06 ` Bart Schaefer
2024-03-22 5:02 ` Bart Schaefer
2024-03-25 16:38 ` Peter Stephenson
2024-03-25 17:36 ` Bart Schaefer
2024-04-03 13:59 ` Vincent Lefevre
2024-03-21 17:39 ` Bart Schaefer
2024-03-23 21:48 ` Bart Schaefer
2024-03-23 22:20 ` Vincent Lefevre [this message]
2024-03-23 22:41 ` Bart Schaefer
2024-03-23 23:33 ` Lawrence Velázquez
2024-03-24 0:14 ` Bart Schaefer
2024-03-24 2:52 ` Lawrence Velázquez
2024-03-25 10:23 ` Vincent Lefevre
2024-03-25 15:21 ` Bart Schaefer
2024-03-25 17:33 ` Vincent Lefevre
2024-03-25 17:43 ` Bart Schaefer
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