| Issue |
64646
|
| Summary |
Unsafe buffer usage: false positive
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
andrew-aitchison
|
// Ubuntu clang version 16.0.0 (1~exp5ubuntu3)
// clang++-16 -Wunsafe-buffer-usage -c -o unsafe.o unsafe.cpp
```
int f(const int a[10])
{
return a[1];
}
```
unsafe.cpp:8:17: warning: 'a' is an unsafe pointer used for buffer access [-Wunsafe-buffer-usage]
int f(const int a[10])
~~~~~~~~~~^~~~~
unsafe.cpp:10:12: note: used in buffer access here
return a[1];
^
1 warning generated.
Since the size of array 'a' is known, and known to be fixed, at compile-time, the access is safe *and* the compiler can determine this, so the warning is a false positive.
While I appreciate that `std::span` would be better, there is much code out there that is not ready for C++20.
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