coccinelle: misc: add excluded_middle.cocci script

Check for !A || A && B condition. It's equivalent to !A || B.

Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
This commit is contained in:
Denis Efremov 2020-09-21 18:28:50 +03:00 committed by Julia Lawall
parent a19d135834
commit b76f0ea013

View File

@ -0,0 +1,39 @@
// SPDX-License-Identifier: GPL-2.0-only
///
/// Condition !A || A && B is equivalent to !A || B.
///
// Confidence: High
// Copyright: (C) 2020 Denis Efremov ISPRAS
// Options: --no-includes --include-headers
virtual patch
virtual context
virtual org
virtual report
@r depends on !patch@
expression A, B;
position p;
@@
* !A || (A &&@p B)
@depends on patch@
expression A, B;
@@
!A ||
- (A && B)
+ B
@script:python depends on report@
p << r.p;
@@
coccilib.report.print_report(p[0], "WARNING !A || A && B is equivalent to !A || B")
@script:python depends on org@
p << r.p;
@@
coccilib.org.print_todo(p[0], "WARNING !A || A && B is equivalent to !A || B")