Coccinelle: Add misc/ifcol.cocci

/// Find confusingly indented code in or after an if.  An if branch should

/// be indented.  The code following an if should not be indented.

/// Sometimes, code after an if that is indented is actually intended to be

/// part of the if branch.

///

/// This has a high rate of false positives, because Coccinelle's column

/// calculation does not distinguish between spaces and tabs, so code that

/// is not visually aligned may be considered to be in the same column.

///

// Confidence: Low

// 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 org

virtual report

@r disable braces4@

position p1,p2;

statement S1,S2;

@@

(

if (...) { ... }

|

if (...) S1@p1 S2@p2

)

@script:python depends on org@

p1 << r.p1;

p2 << r.p2;

@@

if (p1[0].column == p2[0].column):

  cocci.print_main("branch",p1)

  cocci.print_secs("after",p2)

@script:python depends on report@

p1 << r.p1;

p2 << r.p2;

@@

if (p1[0].column == p2[0].column):

  msg = "code aligned with following code on line %s" % (p2[0].line)

  coccilib.report.print_report(p1[0],msg)