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checkpatch: add --strict tests for braces, comments and casts 

Add some more subjective --strict tests.

Add a test for block comments that start with a blank line followed only
by a line with just the comment block initiator.  Prefer a blank line
followed by /* comment...

Add a test for unnecessary spaces after a cast.

Add a test for symmetric uses of braces in if/else blocks.
If one branch needs braces, then all branches should use braces.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joe Perches 2012-03-23 15:02:19 -07:00 committed by Linus Torvalds
parent b337d8b82f
commit aad4f61498
1 changed files with 32 additions and 8 deletions
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40
scripts/checkpatch.pl
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@ -1849,6 +1849,17 @@ sub process {
}
}
if ($line =~ /^\+.*\*[ \t]*\)[ \t]+/) {
CHK("SPACING",
"No space is necessary after a cast\n" . $hereprev);
}
if ($rawline =~ /^\+[ \t]*\/\*[ \t]*$/ &&
$prevrawline =~ /^\+[ \t]*$/) {
CHK("BLOCK_COMMENT_STYLE",
"Don't begin block comments with only a /* line, use /* comment...\n" . $hereprev);
}
# check for spaces at the beginning of a line.
# Exceptions:
# 1) within comments
@ -2961,7 +2972,8 @@ sub process {
#print "chunks<$#chunks> linenr<$linenr> endln<$endln> level<$level>\n";
#print "APW: <<$chunks[1][0]>><<$chunks[1][1]>>\n";
if ($#chunks > 0 && $level == 0) {
my $allowed = 0;
my @allowed = ();
my $allow = 0;
my $seen = 0;
my $herectx = $here . "\n";
my $ln = $linenr - 1;
@ -2972,6 +2984,7 @@ sub process {
my ($whitespace) = ($cond =~ /^((?:\s*\n[+-])*\s*)/s);
my $offset = statement_rawlines($whitespace) - 1;
$allowed[$allow] = 0;
#print "COND<$cond> whitespace<$whitespace> offset<$offset>\n";
# We have looked at and allowed this specific line.
@ -2984,23 +2997,34 @@ sub process {
$seen++ if ($block =~ /^\s*{/);
#print "cond<$cond> block<$block> allowed<$allowed>\n";
#print "cond<$cond> block<$block> allowed<$allowed[$allow]>\n";
if (statement_lines($cond) > 1) {
#print "APW: ALLOWED: cond<$cond>\n";
$allowed = 1;
$allowed[$allow] = 1;
}
if ($block =~/\b(?:if|for|while)\b/) {
#print "APW: ALLOWED: block<$block>\n";
$allowed = 1;
$allowed[$allow] = 1;
}
if (statement_block_size($block) > 1) {
#print "APW: ALLOWED: lines block<$block>\n";
$allowed = 1;
$allowed[$allow] = 1;
}
$allow++;
}
if ($seen && !$allowed) {
WARN("BRACES",
"braces {} are not necessary for any arm of this statement\n" . $herectx);
if ($seen) {
my $sum_allowed = 0;
foreach (@allowed) {
$sum_allowed += $_;
}
if ($sum_allowed == 0) {
WARN("BRACES",
"braces {} are not necessary for any arm of this statement\n" . $herectx);
} elsif ($sum_allowed != $allow &&
$seen != $allow) {
CHK("BRACES",
"braces {} should be used on all arms of this statement\n" . $herectx);
}
}
}
}