From 840080a08492bd2bb3314077b672b59c88bbe0e6 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 13 Oct 2014 15:51:59 -0700 Subject: [PATCH] checkpatch: add exception to return then else test Add an exception to the return before else warning when the line following it is also a return like: if (foo) return bar; else return baz; This form of a test then return is at least as readable as if (foo) return bar; return baz; so don't emit a warning on the first form. Signed-off-by: Joe Perches Reported-by: Al Viro Cc: Elshad Mustafayev Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- scripts/checkpatch.pl | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 74bba23a8df0..52a223ebcd10 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -2641,10 +2641,14 @@ sub process { next if ($realfile !~ /\.(h|c)$/); # check indentation of any line with a bare else +# (but not if it is a multiple line "if (foo) return bar; else return baz;") # if the previous line is a break or return and is indented 1 tab more... if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) { my $tabs = length($1) + 1; - if ($prevline =~ /^\+\t{$tabs,$tabs}(?:break|return)\b/) { + if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ || + ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ && + defined $lines[$linenr] && + $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) { WARN("UNNECESSARY_ELSE", "else is not generally useful after a break or return\n" . $hereprev); } -- 2.39.5