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| author | root <root@artemis.panaceas.org> | 2015-12-25 15:00:15 +0000 |
|---|---|---|
| committer | root <root@artemis.panaceas.org> | 2015-12-25 15:00:15 +0000 |
| commit | ddd86436f4e3643c04b797f858dab95d5f2e4de9 (patch) | |
| tree | bfe7a780cf9a2f4fc33aec32c82e625e79dece1f /backport-include/backport/magic.h | |
| download | backports-3.10.19-1-master.tar.gz backports-3.10.19-1-master.tar.bz2 backports-3.10.19-1-master.zip | |
Diffstat (limited to 'backport-include/backport/magic.h')
| -rw-r--r-- | backport-include/backport/magic.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/backport-include/backport/magic.h b/backport-include/backport/magic.h new file mode 100644 index 0000000..222e025 --- /dev/null +++ b/backport-include/backport/magic.h @@ -0,0 +1,16 @@ +/* + * These tricks are taken from + * http://efesx.com/2010/07/17/variadic-macro-to-count-number-of-arguments/ + * and + * http://efesx.com/2010/08/31/overloading-macros/ + */ + +#define VA_NUM_ARGS(...) VA_NUM_ARGS_IMPL(__VA_ARGS__, 5,4,3,2,1) +#define VA_NUM_ARGS_IMPL(_1,_2,_3,_4,_5,N,...) N + +#define macro_dispatcher(func, ...) \ + macro_dispatcher_(func, VA_NUM_ARGS(__VA_ARGS__)) +#define macro_dispatcher_(func, nargs) \ + macro_dispatcher__(func, nargs) +#define macro_dispatcher__(func, nargs) \ + func ## nargs |