<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/161014>161014</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            -Wdeclaration-after-statement dislikes _Static_assert
        </td>
    </tr>

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

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

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

<pre>
    ```c
int foo(void)
{
    _Static_assert(2+2 == 4, "");
    int a = 2;
    _Static_assert(2+2 == 4, "");
    a += 2;
    _Static_assert(2+2 == 4, "");
    return a;
}
```
-xc -Wdeclaration-after-statement

https://godbolt.org/z/Ee4aPbcd9

Result: 1x `warning: mixing declarations and code is incompatible with standards before C99 [-Wdeclaration-after-statement]`.

Expected: Since a succeeding _Static_assert does nothing, it's neither declaration nor code; therefore, omit the warning. Especially considering _Static_assert itself is incompatible with standards before C99.

Found it at winehq, they're using that warning to enforce their coding style. https://gitlab.winehq.org/wine/wine/-/merge_requests/9061#note_116902
</pre>
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