Re: [Qemu-devel] [PATCH] checkpatch: Escape left braces in regex

[Paolo Bonzini <pbonzini@redhat.com>]

On 11/09/2015 13:07, Fam Zheng wrote:
> Latest perl now deprecates "{" literal in regex and print warnings like
> "unescaped left brace in regex is deprecated".  Add escape to keep it
> happy.
> 
> Signed-off-by: Fam Zheng <famz@redhat.com>
> ---
>  scripts/checkpatch.pl | 22 +++++++++++-----------
>  1 file changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 7f0aae9..14985be 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -633,7 +633,7 @@ sub statement_block_size {
>  	my ($stmt) = @_;
>  
>  	$stmt =~ s/(^|\n)./$1/g;
> -	$stmt =~ s/^\s*{//;
> +	$stmt =~ s/^\s*\{//;
>  	$stmt =~ s/}\s*$//;
>  	$stmt =~ s/^\s*//;
>  	$stmt =~ s/\s*$//;
> @@ -1644,7 +1644,7 @@ sub process {
>  			# 79 or 80 characters, it is no longer possible to add a space and an
>  			# opening brace there)
>  			if ($#ctx == 0 && $ctx !~ /{\s*/ &&
> -			    defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*{/ &&
> +			    defined($lines[$ctx_ln - 1]) && $lines[$ctx_ln - 1] =~ /^\+\s*\{/ &&
>  			    defined($lines[$ctx_ln - 2]) && length($lines[$ctx_ln - 2]) < 80) {
>  				ERROR("that open brace { should be on the previous line\n" .
>  					"$here\n$ctx\n$rawlines[$ctx_ln - 1]\n");
> @@ -1684,7 +1684,7 @@ sub process {
>  			my $continuation = 0;
>  			my $check = 0;
>  			$s =~ s/^.*\bdo\b//;
> -			$s =~ s/^\s*{//;
> +			$s =~ s/^\s*\{//;
>  			if ($s =~ s/^\s*\\//) {
>  				$continuation = 1;
>  			}
> @@ -1783,7 +1783,7 @@ sub process {
>  		}
>  
>  # check for initialisation to aggregates open brace on the next line
> -		if ($line =~ /^.\s*{/ &&
> +		if ($line =~ /^.\s*\{/ &&
>  		    $prevline =~ /(?:^|[^=])=\s*$/) {
>  			ERROR("that open brace { should be on the previous line\n" . $hereprev);
>  		}
> @@ -1936,13 +1936,13 @@ sub process {
>  
>  # function brace can't be on same line, except for #defines of do while,
>  # or if closed on same line
> -		if (($line=~/$Type\s*$Ident\(.*\).*\s{/) and
> -		    !($line=~/\#\s*define.*do\s{/) and !($line=~/}/)) {
> +		if (($line=~/$Type\s*$Ident\(.*\).*\s\{/) and
> +		    !($line=~/\#\s*define.*do\s\{/) and !($line=~/}/)) {
>  			ERROR("open brace '{' following function declarations go on the next line\n" . $herecurr);
>  		}
>  
>  # open braces for enum, union and struct go on the same line.
> -		if ($line =~ /^.\s*{/ &&
> +		if ($line =~ /^.\s*\{/ &&
>  		    $prevline =~ /^.\s*(?:typedef\s+)?(enum|union|struct)(?:\s+$Ident)?\s*$/) {
>  			ERROR("open brace '{' following $1 go on the same line\n" . $hereprev);
>  		}
> @@ -2091,7 +2091,7 @@ sub process {
>                                  # not required when having a single },{ on one line
>  				} elsif ($op eq ',') {
>  					if ($ctx !~ /.x[WEC]/ && $cc !~ /^}/ &&
> -                                            ($elements[$n] . $elements[$n + 2]) !~ " *}{") {
> +                                            ($elements[$n] . $elements[$n + 2]) !~ " *}\\{") {
>  						ERROR("space required after that '$op' $at\n" . $hereptr);
>  					}
>  
> @@ -2211,8 +2211,8 @@ sub process {
>  ## 		}
>  
>  #need space before brace following if, while, etc
> -		if (($line =~ /\(.*\){/ && $line !~ /\($Type\){/) ||
> -		    $line =~ /do{/) {
> +		if (($line =~ /\(.*\)\{/ && $line !~ /\($Type\)\{/) ||
> +		    $line =~ /do\{/) {
>  			ERROR("space required before the open brace '{'\n" . $herecurr);
>  		}
>  
> @@ -2551,7 +2551,7 @@ sub process {
>  					my $spaced_block = $block;
>  					$spaced_block =~ s/\n\+/ /g;
>  
> -					$seen++ if ($spaced_block =~ /^\s*{/);
> +					$seen++ if ($spaced_block =~ /^\s*\{/);
>  
>                                          print "APW: cond<$cond> block<$block> allowed<$allowed>\n"
>                                              if $dbg_adv_apw;
> 

Applied to my queue, but I wouldn't be surprised Peter commits it directly.

Paolo