| Issue |
152274
|
| Summary |
Compilation error when trying to cast to pointer-to-array with typeof() in C++
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
Michael137
|
Came up in https://github.com/llvm/llvm-project/issues/152113
When trying to perform following cast:
```
int main() {
char *s = "abc";
(typeof(*s)(*)[3])s;
}
```
Clang (and GCC FWIW), produce following error ([godbolt](https://godbolt.org/z/M7Ye8o3G4)):
```
main.cpp:6:18: error: expected _expression_
6 | (typeof(*s)(*)[3])s;
```
But this works fine in C ([godbolt](https://godbolt.org/z/j33qrGv1r)).
However, wrapping the `typeof` in another `typeof` works fine in both C ([godbolt](https://godbolt.org/z/fr1WP7eGo)) and C++ ([godbolt](https://godbolt.org/z/4z7xhPfGn)):
```
int main() {
char *s = "abc";
*(typeof(typeof(*s))(*)[3])s;
}
```
What's the correct behaviour here?
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