scripts/coccinelle/misc/semicolon.cocci: Add unneeded semicolon test

This semantic patch looks for semicolons that can be removed without
changing the semantics of the code. The confidence is moderate
because there are some false positives on cases like:

b/drivers/mmc/host/cb710-mmc.c:589
                break;
        case MMC_POWER_UP:
        default:
-               /* ignore */;
        }

There are 37 patches accepted reported by this semantic patch and
more than 300 fixes to be applied.

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This commit is contained in:
Peter Senna Tschudin 2012-12-08 15:34:34 -02:00 committed by Michal Marek
parent 9f14b42012
commit 7320bfa7cf

View File

@ -0,0 +1,83 @@
///
/// Removes unneeded semicolon.
///
// Confidence: Moderate
// Copyright: (C) 2012 Peter Senna Tschudin, INRIA/LIP6. GPLv2.
// URL: http://coccinelle.lip6.fr/
// Comments: Some false positives on empty default cases in switch statements.
// Options: --no-includes --include-headers
virtual patch
virtual report
virtual context
virtual org
@r_default@
position p;
@@
switch (...)
{
default: ...;@p
}
@r_case@
position p;
@@
(
switch (...)
{
case ...:;@p
}
|
switch (...)
{
case ...:...
case ...:;@p
}
|
switch (...)
{
case ...:...
case ...:
case ...:;@p
}
)
@r1@
statement S;
position p1;
position p != {r_default.p, r_case.p};
identifier label;
@@
(
label:;
|
S@p1;@p
)
@script:python@
p << r1.p;
p1 << r1.p1;
@@
if p[0].line != p1[0].line_end:
cocci.include_match(False)
@depends on patch@
position r1.p;
@@
-;@p
@script:python depends on report@
p << r1.p;
@@
coccilib.report.print_report(p[0],"Unneeded semicolon")
@depends on context@
position r1.p;
@@
*;@p
@script:python depends on org@
p << r1.p;
@@
cocci.print_main("Unneeded semicolon",p)