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Re: Inconsistent arithmetic evaluation of parameters
From: |
Chet Ramey |
Subject: |
Re: Inconsistent arithmetic evaluation of parameters |
Date: |
Wed, 2 Sep 2015 11:24:42 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 |
On 9/2/15 11:19 AM, Greg Wooledge wrote:
> On Wed, Sep 02, 2015 at 10:16:14AM -0500, Dennis Williamson wrote:
>> The $ is implied.
>
> That is completely absurd. (And wrong.)
Not exactly. When the arithmetic evaluator encounters a token that is of
the form of a shell identifier (`bar'), in a context where an operand is
needed, it treats it as a shell variable and looks up the variable's
value. In that sense, it's an expansion.
The difference between bash and dash is what each shell does with that
value.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/
- Inconsistent arithmetic evaluation of parameters, Clint Hepner, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Greg Wooledge, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Dennis Williamson, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Greg Wooledge, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Dennis Williamson, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Andreas Schwab, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Dennis Williamson, 2015/09/01
- Re: Inconsistent arithmetic evaluation of parameters, Andreas Schwab, 2015/09/02
- Re: Inconsistent arithmetic evaluation of parameters, Dennis Williamson, 2015/09/02
- Re: Inconsistent arithmetic evaluation of parameters, Greg Wooledge, 2015/09/02
- Re: Inconsistent arithmetic evaluation of parameters,
Chet Ramey <=
- Re: Inconsistent arithmetic evaluation of parameters, Greg Wooledge, 2015/09/02
- Re: Inconsistent arithmetic evaluation of parameters, Chet Ramey, 2015/09/03
- Re: Inconsistent arithmetic evaluation of parameters, Chet Ramey, 2015/09/02
- Re: Inconsistent arithmetic evaluation of parameters, Stephane Chazelas, 2015/09/03
- Re: Inconsistent arithmetic evaluation of parameters, Dennis Williamson, 2015/09/03
- Re: Inconsistent arithmetic evaluation of parameters, Chet Ramey, 2015/09/02
Re: Inconsistent arithmetic evaluation of parameters, Chet Ramey, 2015/09/02