From: Kurtis Rader <krader@skepticism.us>
To: Zsh Users <zsh-users@zsh.org>
Subject: Re: grammar triviality with '&&'
Date: Sun, 1 Mar 2015 19:53:28 -0800 [thread overview]
Message-ID: <CABx2=D8efL3X2tfB+_+VweY2yye6EhaMNbJa3b3jJeVMp=7gaQ@mail.gmail.com> (raw)
In-Reply-To: <20150302022754.GA7449@xvii.vinc17.org>
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On Sun, Mar 1, 2015 at 6:27 PM, Vincent Lefevre <vincent@vinc17.net> wrote:
> However "&& [ -e file2 ]" could constitute a list too. There is
> currently a parse error, but zsh could have an extension to accept
> it as being equivalent to: "[[ $? -eq 0 ]] && [ -e file2 ]". Would
> there be anything wrong with such an extension?
>
> Similarly, "|| X" could be regarded as equivalent to
> "[[ $? -ne 0 ]] || X" by zsh.
>
How often would such a feature be useful? Very infrequently in my opinion.
Furthermore, it is almost guaranteed to cause anyone reading the statement
to wonder if the author made a mistake as the idiom is unlike anything
else I can think of in Bourne style shells. I believe the benefits don't
justify the costs of the feature.
--
Kurtis Rader
Caretaker of the exceptional canines Junior and Hank
next prev parent reply other threads:[~2015-03-02 3:53 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-01 16:07 Ray Andrews
2015-03-01 16:43 ` ZyX
2015-03-01 17:01 ` Ray Andrews
2015-03-01 18:48 ` Bart Schaefer
2015-03-01 19:00 ` ZyX
2015-03-01 19:16 ` Ray Andrews
2015-03-01 20:48 ` ZyX
2015-03-01 18:49 ` Lawrence Velázquez
2015-03-02 2:27 ` Vincent Lefevre
2015-03-02 3:12 ` Ray Andrews
2015-03-02 5:22 ` Lawrence Velázquez
2015-03-02 3:53 ` Kurtis Rader [this message]
2015-03-02 4:18 ` Ray Andrews
2015-03-02 5:22 ` Kurtis Rader
2015-03-02 16:17 ` Ray Andrews
2015-03-02 18:52 ` Kurtis Rader
2015-03-02 19:03 ` ZyX
2015-03-02 20:16 ` Kurtis Rader
2015-03-03 4:15 ` ZyX
2015-03-03 4:43 ` Kurtis Rader
2015-03-04 15:03 ` Vincent Lefevre
2015-03-04 19:07 ` ZyX
2015-03-02 19:25 ` Ray Andrews
2015-03-02 10:46 ` Vincent Lefevre
2015-03-02 11:06 ` Peter Stephenson
2015-03-02 19:19 ` Bart Schaefer
2015-03-04 14:47 ` Vincent Lefevre
2015-03-05 1:51 ` Bart Schaefer
2015-03-05 10:06 ` Peter Stephenson
2015-03-02 8:54 ` Bart Schaefer
2015-03-02 10:31 ` Vincent Lefevre
2015-03-02 16:31 ` Ray Andrews
2015-03-02 16:49 ` Bart Schaefer
2015-03-02 17:38 ` Ray Andrews
2015-03-02 18:51 ` Bart Schaefer
2015-03-04 8:55 ` Vincent Lefevre
2015-03-04 17:12 ` Ray Andrews
2015-03-06 4:59 ` Bart Schaefer
2015-03-06 16:10 ` Ray Andrews
2015-03-06 20:23 ` Lawrence Velázquez
2015-03-06 21:25 ` Ray Andrews
2015-03-06 16:32 ` Vincent Lefevre
2015-03-06 17:43 ` Bart Schaefer
2015-03-06 21:01 ` Ray Andrews
2015-03-09 11:26 ` Vincent Lefevre
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