basic/log: add note about operator precendence

2018-11-22 10:56:43 +01:00 · 2018-11-22 10:56:43 +01:00 · 5dc881a359
parent cd7bcfa8fe
commit 5dc881a359
1 changed files with 1 additions and 0 deletions
--- a/src/basic/log.h
+++ b/src/basic/log.h
@ -36,6 +36,7 @@ typedef enum LogTarget{
        _LOG_TARGET_INVALID = -1
 } LogTarget;

+/* Note to readers: << and >> have lower precedence than & and | */
 #define LOG_REALM_PLUS_LEVEL(realm, level)  ((realm) << 10 | (level))
 #define LOG_REALM_REMOVE_LEVEL(realm_level) ((realm_level) >> 10)
 #define SYNTHETIC_ERRNO(num)                (1 << 30 | (num))