Re: [Qemu-devel] [PATCH v4] scripts/checkpatch.pl: add check for `while` and `for`

[Paolo Bonzini]

On 06/03/2018 08:04, Su Hang wrote:
> Adding check for `while` and `for` statements, which condition has more than
> one line.
> 
> The former checkpatch.pl can check `if` statement, which condition has more
> than one line, whether block misses brace round, like this:
> '''
> if (cond1 ||
>     cond2)
>     statement;
> '''
> But it doesn't do the same check for `for` and `while` statements.
> 
> Using `(?:...)` instead of `(...)` in regex pattern catch.
> Because `(?:...)` is faster and avoids unwanted side-effect.
> 
> Suggested-by: Stefan Hajnoczi <address@hidden>
> Suggested-by: Eric Blake <address@hidden>
> Suggested-by: Thomas Huth <address@hidden>
> Signed-off-by: Su Hang <address@hidden>
> ---
>  scripts/checkpatch.pl | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 1b4b812e28fa..b1a8407d7406 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -2352,8 +2352,9 @@ sub process {
>                       }
>               }
>  
> -# check for missing bracing round if etc
> -             if ($line =~ /(^.*)\bif\b/ && $line !~ /\#\s*if/) {
> +# check for missing bracing around if etc
> +             if ($line =~ /(^.*)\b(?:if|while|for)\b/ &&
> +                     $line !~ /\#\s*(?:if|while|for)/) {

The second line checks for preprocessor statements and does not need to
be extended with (?:if|while|for).

I changed this and applied the patch.  Thanks,

Paolo


>                       my ($level, $endln, @chunks) =
>                               ctx_statement_full($linenr, $realcnt, 1);
>                          if ($dbg_adv_apw) {
> 

Q