| Issue |
141724
|
| Summary |
[Clang] C23 struct compatiblity rule differs from GCC
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
fuhsnn
|
The last case shows that clang-21 currently treat two same-record structs without tag as compatible, while GCC doesn't.
```
struct {int i;} nontag;
struct tag {int i;} tagged;
static_assert(1 == _Generic(tagged, struct tag {int i;}:1, default:0)); // both 1
static_assert(0 == _Generic(tagged, struct {int i;}:1, default:0)); // both 0
static_assert(0 == _Generic(nontag, struct tag {int i;}:1, default:0)); // both 0
static_assert(0 == _Generic(nontag, struct {int i;}:1, default:0)); // gcc:0 clang:1
```
https://godbolt.org/z/bGWfYT5WE
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