Coccinelle: Find doubled arguments to boolean or bit operators.

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Nicolas Palix <npalix.work@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>

scripts/coccinelle/tests/doubletest.cocci

@@ -0,0 +1,40 @@
+/// Find &&/|| operations that include the same argument more than once
+//# A common source of false positives is when the argument performs a side
+//# effect.
+///
+// Confidence: Moderate
+// Copyright: (C) 2010 Nicolas Palix, DIKU.  GPLv2.
+// Copyright: (C) 2010 Julia Lawall, DIKU.  GPLv2.
+// Copyright: (C) 2010 Gilles Muller, INRIA/LiP6.  GPLv2.
+// URL: http://coccinelle.lip6.fr/
+// Comments:
+// Options: -no_includes -include_headers
+
+virtual context
+virtual org
+virtual report
+
+@r expression@
+expression E;
+position p;
+@@
+
+(
+* E@p
+  || ... || E
+|
+* E@p
+  && ... && E
+)
+
+@script:python depends on org@
+p << r.p;
+@@
+
+cocci.print_main("duplicated argument to && or ||",p)
+
+@script:python depends on report@
+p << r.p;
+@@
+
+coccilib.report.print_report(p[0],"duplicated argument to && or ||")