Re: [Qemu-devel] [PATCH] scripts/checkpatch.pl: Don't allow special cases of unspaced operators

[Eric Blake]

On 12/18/2015 05:59 AM, Peter Maydell wrote:
> The checkpatch.pl script has a special case to permit the following
> operators to have no spaces around them:
>  <<  >>  &  ^  |  +  -  *  /  %
> 
> QEMU style prefers all operators to consistently have spacing around
> them, so remove this special case handling. This avoids reviewers
> having to manually note it during code review.
> 
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> I actually thought failing to point out the lack of spaces was
> a checkpatch parsing bug until I looked in the source and found it
> was deliberate...
> 
> I say "QEMU style prefers", but possibly what I actually mean is
> "I prefer" ? Does anybody want to defend the unspaced versions?

I'm in favor of this patch; it only affects new code, and explains why I
have been spotting unspaced operators in new code that didn't trigger
checkpatch noise.

> 
>  scripts/checkpatch.pl | 13 -------------
>  1 file changed, 13 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index b0f6e11..efca817 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -1890,19 +1890,6 @@ sub process {
>                                               ERROR("space prohibited after 
> that '$op' $at\n" . $hereptr);
>                                       }
>  
> -
> -                             # << and >> may either have or not have spaces 
> both sides
> -                             } elsif ($op eq '<<' or $op eq '>>' or
> -                                      $op eq '&' or $op eq '^' or $op eq '|' 
> or
> -                                      $op eq '+' or $op eq '-' or
> -                                      $op eq '*' or $op eq '/' or
> -                                      $op eq '%')
> -                             {

What's weird is that the comment wasn't even correct.  Probably one
person special-cased << and >>, and another then extended to
special-case all operators.

Reviewed-by: Eric Blake <address@hidden>

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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