| Issue |
154024
|
| Summary |
[Clang] constant evaluation should reject reinterpret_casting arbitrary addresses
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
philnik777
|
Clang currently accepts
```c++
#define fold(x) (__builtin_constant_p(x) ? (x) : (x))
constexpr int* x = fold((int*)123);
```
It looks like this has been added for GCC compatibility over a decade ago. However, GCC rejects this since version 7: https://godbolt.org/z/qMoK83dfP. I don't see a good reason this should be accepted, especially since GCC has started rejecting it a long time ago by now.
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