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systemd-stable/coccinelle/no-if-assignments.cocci
Lennart Poettering 3cc2aff1ab tree-wide: don't do assignments within if checks 
Turn this:

       if ((r = foo()) < 0) { ...

into this:

       r = foo();
       if (r < 0) { ...
2015-09-09 08:20:20 +02:00

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@@
expression p, q;
identifier r;
statement s;
@@
- if ((r = q) < p)
- s
+ r = q;
+ if (r < p)
+ s
@@
expression p, q;
identifier r;
statement s;
@@
- if ((r = q) >= p)
- s
+ r = q;
+ if (r >= p)
+ s
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