From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: zsh-workers@zsh.org
Subject: Re: [PATCH] Use == in expressions instead of the deprecated =
Date: Thu, 8 Sep 2016 19:47:40 +0100 [thread overview]
Message-ID: <20160908184740.GA16973@chaz.gmail.com> (raw)
In-Reply-To: <CAHYJk3T1adJ3EGYd+Ry1K9XWeznGCziHUzgfPuT1bX04Jh7i4Q@mail.gmail.com>
2016-09-08 18:39:55 +0200, Mikael Magnusson:
[...]
> >> ksh93 also makes "==" obsolete in [[...]]. "==" is still not
> >> POSIX (and likely not going to be soon as requests to add it
> >> have been rejected (IIRC)) for the "test"/"[" utility (or expr).
>
> POSIX doesn't have [[...]] so what it says isn't really relevant. [ a
> == b ] doesn't work in zsh by default either, you have to use either [
> a = b ] or [ a \== b ] and obviously the latter is pretty ridiculous.
> :)
[...]
I only said "==" was not POSIX *for the "test"/"[" utility (or
expr)*.
It's not relevant to [[...]] except that [[..]] was more or less
the "[" utility moved to a new shell construct to avoid some of
the issues with the interpretation of the arguments of the "["
command (most of which have later been fixed by POSIX).
Now, I agree, given that [ a == b ] doesn't work in zsh when not
in sh emulation, that's one more reason zsh maybe shouldn't
consider [[ a = b ]] as obsolete.
AFAICT, none of mksh, pdksh, yash, bash consider [[ = ]]
obsolete ([ = ] for yash which doesn't have [[ ]]).
--
Stephane
next prev parent reply other threads:[~2016-09-08 19:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-05 21:27 Teubel György
2016-09-08 8:35 ` Peter Stephenson
2016-09-08 11:16 ` Peter Stephenson
2016-09-08 14:31 ` Stephane Chazelas
2016-09-08 15:06 ` Stephane Chazelas
2016-09-08 15:14 ` Peter Stephenson
2016-09-08 16:39 ` Mikael Magnusson
2016-09-08 18:47 ` Stephane Chazelas [this message]
2016-09-09 12:03 ` Vincent Lefevre
[not found] ` <CGME20160912143133eucas1p11a4e6916dd70b3ceaa163bf3bddfb007@eucas1p1.samsung.com>
2016-09-12 14:31 ` Peter Stephenson
2016-09-09 8:52 ` Stephane Chazelas
2016-09-09 9:31 ` Peter Stephenson
2016-09-09 16:00 ` Stephane Chazelas
2016-09-14 22:01 ` PATCH: [[ -v varname ]] Oliver Kiddle
2016-09-15 10:55 ` Vincent Lefevre
2016-09-16 0:36 ` Bart Schaefer
2016-09-15 11:08 ` Stephane Chazelas
2016-09-15 11:22 ` wrong "export -p" output for exported but not set variables (Was: PATCH: [[ -v varname ]]) Stephane Chazelas
2016-09-09 17:01 ` [PATCH] Use == in expressions instead of the deprecated = Christian Neukirchen
2016-09-09 18:54 ` Stephane Chazelas
2016-09-09 13:05 ` Peter Stephenson
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