Is the below code undefined behavior in c++11 ? My feeling it's not
i += arr[i++]
Asked
Active
Viewed 60 times
1
-
[This answer](https://stackoverflow.com/a/4183735/962089) has an explicit statement for `i = arr[i++]` being UB in C++11. += on top of that won't help. – chris Jul 26 '20 at 18:36
-
1It stops being UB in C++17. – HolyBlackCat Jul 26 '20 at 18:41
-
_Is the below code undefined behavior in c++11?_ Yes, it is undefined behavior in C++11. _My feeling it's not_ Your feeling has lead you astray. – Eljay Jul 26 '20 at 18:43
-
3Why does it matter?
If you have to ask, the code is badly written. – Pete Becker Jul 26 '20 at 20:23 -
`i += arr[i]; ++i;` has a well-defined meaning and is readable. – Pete Becker Jul 26 '20 at 20:24
-
Didnt know it was ub before, what is this?! – Jul 26 '20 at 21:17