[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [patch #10070] toggle invert flag when reading `!'
From: |
Andreas Schwab |
Subject: |
Re: [patch #10070] toggle invert flag when reading `!' |
Date: |
Thu, 27 May 2021 17:20:00 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
On Mai 27 2021, Chet Ramey wrote:
> On 5/26/21 9:55 PM, Dale R. Worley wrote:
>
>>> $ ! ! [ 1 -eq 1 ]; echo $?
>>> 0
>> That last one isn't defined by the manual page. I'm surprised you don't
>> get a syntax error.
>
> It's clearly valid.
According to the POSIX grammar, a pipeline can only be a pipe_sequence
optionally preceded by a single Bang. If you want another Bang the
pipe_sequnce needs to be either a subshell or a brace_group.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
- Re: [patch #10070] toggle invert flag when reading `!', Chet Ramey, 2021/05/24
- Re: [patch #10070] toggle invert flag when reading `!', felix, 2021/05/26
- Re: [patch #10070] toggle invert flag when reading `!', Dale R. Worley, 2021/05/26
- Re: [patch #10070] toggle invert flag when reading `!', Chet Ramey, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!',
Andreas Schwab <=
- Re: [patch #10070] toggle invert flag when reading `!', Chet Ramey, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Andreas Schwab, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Chet Ramey, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Andreas Schwab, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Alex fxmbsw7 Ratchev, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Greg Wooledge, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Alex fxmbsw7 Ratchev, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Andreas Schwab, 2021/05/27
- Re: [patch #10070] toggle invert flag when reading `!', Andreas Schwab, 2021/05/27