scripts/coccinelle/tests/doublebitand.cocci

   1 /// Find bit operations that include the same argument more than once
   2 //# One source of false positives is when the argument performs a side
   3 //# effect.  Another source of false positives is when a neutral value
   4 //# such as 0 for | is used to indicate no information, to maintain the
   5 //# same structure as other similar expressions
   6 ///
   7 // Confidence: Moderate
   8 // Copyright: (C) 2010 Nicolas Palix, DIKU.  GPLv2.
   9 // Copyright: (C) 2010 Julia Lawall, DIKU.  GPLv2.
  10 // Copyright: (C) 2010 Gilles Muller, INRIA/LiP6.  GPLv2.
  11 // URL: http://coccinelle.lip6.fr/
  12 // Comments:
  13 // Options: --no-includes --include-headers
  14
  15 virtual context
  16 virtual org
  17 virtual report
  18
  19 @r expression@
  20 expression E;
  21 position p;
  22 @@
  23
  24 (
  25 *        E@p
  26          & ... & E
  27 |
  28 *        E@p
  29          | ... | E
  30 |
  31 *        E@p
  32          & ... & !E
  33 |
  34 *        E@p
  35          | ... | !E
  36 |
  37 *        !E@p
  38          & ... & E
  39 |
  40 *        !E@p
  41          | ... | E
  42 )
  43
  44 @script:python depends on org@
  45 p << r.p;
  46 @@
  47
  48 cocci.print_main("duplicated argument to & or |",p)
  49
  50 @script:python depends on report@
  51 p << r.p;
  52 @@
  53
  54 coccilib.report.print_report(p[0],"duplicated argument to & or |")