<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/83658>83658</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Type definitions should be allowed inside of the offsetof type
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Halalaluyafail3
      </td>
    </tr>
</table>

<pre>
    Clang does not accept type definitions inside of the type provided to offsetof. However, I don't see any wording which forbids this. Here is an example program (Clang 16 and newer don't seem to accept this):

```c
#include<stddef.h>
int main(void){
 offsetof(struct{int a;},a);
}
```

There was a proposal (N2350) which added some text to make this UB, but that has been changed since by DE-137 (N3148) which removes this restriction and only makes it UB if there is an unparenthesized comma inside of offsetof. N3167 includes discussion about accepting DE-137.
</pre>
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