Re: Man page pre & post operators error

["Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>]

Hello Rick,

On 9/23/19 12:50 AM, Rick Stanley wrote:
> Thank you for the update.
> 
> I am sorry you have interpreted my request as a demand.  It was not
> meant or presented as such.

Okay. 

Thanks,

Michael

> On Sun, 2019-09-22 at 23:01 +0200, Michael Kerrisk (man-pages) wrote:
>> Hello Rick,
>>
>> On 9/20/19 4:19 PM, Rick Stanley wrote:
>>> Greetings!
>>>
>>> In the man pages, both in Linux and online in multiple sites, the
>>> pre
>>> and post operators are listed as equal precedence.  Two different
>>> web
>>> sites list them on different levels:
>>>
>>> http://man7.org/linux/man-pages/man7/precedence.7.html
>>> 	Level 1
>>>
>>> https://linux.die.net/man/7/operator
>>> 	Level 2
>>>
>>> Linux `man operator` list them on the second level, with right to
>>> left
>>> associativity:
>>>
>>>        Operator                            Associativity
>>>        () [] -> .                          left to right
>>>        ! ~ ++ -- + - (type) * & sizeof     right to left
>>>        ...
>>>
>>> Section "A.2.1 Expressions" of both the C99 & C11 C Draft
>>> Standards,
>>> list them on different levels:
>>>
>>> 	postfix ++ & -- on level 1, with left to right associativity
>>>
>>> 	prefix ++ & -- on level 2, with right to left associativity
>>
>> So, Harbison & Steele also seems to agree here. Things changed since
>> K&R! I've fixed the page:
>>
>>        Operator                            Associativity   Notes
>>        () [] -> . ++ --                    left to right   [1]
>>        ! ~ ++ -- + - (type) * & sizeof     right to left   [2]
>>        [...]
>>
>>        The following notes provide further information to
>> the  above  ta‐
>>        ble:
>>
>>        [1] The ++ and -- operators at this precedence level are the
>> post‐
>>            fix flavors of the operators.
>>        [2] The ++ and -- operators at this precedence level are
>> the  pre‐
>>            fix flavors of the operators.
>>
>>> Please review this and all the operator precedence and
>>> associativity in
>>> the current man page "man operator" against the official C99 & C11
>>> Standards documents, plus the current working draft for the next
>>> version of the Standard.
>>
>> You are free to do so. But please don't demand that someone else
>> does so, even if you say "please".
>>
>> Thank you for the bug report!
>>
>> Cheers,
>>
>> Michael
>>


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/