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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 17:43:06 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
On Mai 27 2021, Chet Ramey wrote:
> On 5/27/21 11:20 AM, Andreas Schwab wrote:
>> 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.
>
> True, but bash accepts it.
The manual doesn't document that extension, though.
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, 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 <=
- 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