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Re: Number with sign is read as octal despite a leading 10#
From: |
Chet Ramey |
Subject: |
Re: Number with sign is read as octal despite a leading 10# |
Date: |
Tue, 10 Jul 2018 23:17:52 -0400 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:52.0) Gecko/20100101 Thunderbird/52.9.0 |
On 7/10/18 4:57 PM, Isaac Marcos wrote:
> Chet Ramey (<chet.ramey@case.edu <mailto:chet.ramey@case.edu>>) wrote:
>
> On 7/10/18 2:48 PM, Isaac Marcos wrote:
> > That is not an integer constant. Integer constants don't begin
> with `-'.
>
>
> That makes negative numbers invalid.
You need to look at the difference between constants and operators. This is
what allows you to write $(( -a )), for instance.
> Because of the difference between an operator and a constant. Unary plus
> and minus have a higher precedence than arithmetic operators. So if you
> expand the `a' to an expression, which is what happens, the expression
> consists of an operator (+ or -) and a constant, and that expression has
> a higher precedence than the +. You might think about why using `$a' in
> place of the `a' would not work all the time.
>
>
>
> I don't care. All other shells do this correctly. It makes you the only one
> wrong.
"All other shells" is kind of a broad statement.
--
``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/
- Re: Number with sign is read as octal despite a leading 10#, (continued)
- Re: Number with sign is read as octal despite a leading 10#, Ilkka Virta, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Ilkka Virta, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Chet Ramey, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Ilkka Virta, 2018/07/10
- Message not available
- Message not available
- Re: Number with sign is read as octal despite a leading 10#, Isaac Marcos, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Eduardo Bustamante, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Isaac Marcos, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Isaac Marcos, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Chet Ramey, 2018/07/10
- Re: Number with sign is read as octal despite a leading 10#, Robert Elz, 2018/07/13
- Re: Number with sign is read as octal despite a leading 10#,
Chet Ramey <=
- Re: Number with sign is read as octal despite a leading 10#, Pierre Gaston, 2018/07/10
Re: Number with sign is read as octal despite a leading 10#, Chet Ramey, 2018/07/10