[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: set -u not working as expected
From: |
Chet Ramey |
Subject: |
Re: set -u not working as expected |
Date: |
Sun, 2 Aug 2020 16:41:32 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 8/1/20 8:47 PM, Lawrence Velázquez wrote:
>> let v+=1 # Line 18, Once line 11 is uncommented, Bash fails here
>
> I haven't seen the code for arithmetic expansion, but I assume it
> treats v+=1 as morally equivalent to v=${v}+1 (à la C99). Thus there
> *is* an expansion, which fails under set -u. Regardless of the
> particulars, ksh and zsh again agree:
This is indeed what happens in an arithmetic context. It happens with
pre- and post-increment and decrement operators, too.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@case.edu http://tiswww.cwru.edu/~chet/
- set -u not working as expected, Kristof Burek, 2020/08/01
- Re: set -u not working as expected, Lawrence Velázquez, 2020/08/01
- Re: set -u not working as expected, Lawrence Velázquez, 2020/08/02
- Re: set -u not working as expected, Oğuz, 2020/08/02
- Re: set -u not working as expected, Lawrence Velázquez, 2020/08/02
- Re: set -u not working as expected, Oğuz, 2020/08/02
- Re: set -u not working as expected, Oğuz, 2020/08/02
- Re: set -u not working as expected, Chet Ramey, 2020/08/02
- Re: set -u not working as expected, Chet Ramey, 2020/08/02
Re: set -u not working as expected,
Chet Ramey <=
Re: set -u not working as expected, Chet Ramey, 2020/08/02