<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=http://email.email.llvm.org/c/eJylVE2PmzAQ_TXmMmpEYIHkwCG76bbquVKPK2MP4NaxWdskob--Y_Kx7La3ShbYzMzze2-MGyun-qti2RNL9yzdnXo0MDgcuFOmg9Y68IEbyZ1Uv3lQ1oAy8OPL-gFsC6FXHlrkYXQIJwTHYzhYmN_CGq98QCMmOKnQQyfE6rLNM-FKFJq7GdNf4qxMX174GOxLmAakVawALgQOwQPXGp7gdeRatQqdj0Q4OOTeGt5oIsAn0gEkIX4EQicFDtvRo4_YDn1wSoQITJLm7XbBHpSg2Qq-9whS8c5YH5TwJI6HK0injgThEQ9A4pSRSvCAl4zQo0fo-RHBq8OgJzA2wIQBGiQvZxMkMaL9ZunXZ_4Zbnxo8joqWpGcwZJ_6ID8IeZUZgQCyzYsq5bWZBWoaMCRzJAs276BXhWB4CbyaBD4MGhF2xPzWAt_Q516JfoIGCuI0lGR1xNRH6Zo7JL3DvwhNgLPnLReLRD2MCiN_t5laMYwg80fZg9Zvnunv0wv43ruSDUcuDKz1C2w6vHyHUDaMTb3DCzfQ16x_B5h2TONa4ukRU_VVbiel5nZLXOh9831s5shWVaeF6D38Lua879Slxk32898zlym3WPLfH7-kMeq_QdnLsvvPTe__GX-DY1fmpjIOpfbfMsTAu6tq7uRfjcZktHpug9h8NH12aWOGjE2K-oULbQ-3l6fBmd_Iv0T2bPyfkRPkyIviyzpa1nKtuVSltuqWaPAvCmLSogiXRcPOYpNonmD2teseGTFPvn_LVWdpRmNdLNer7d5scrWRb4pK9mWouDVhrOHFOmU6FXEWVnXJa6eIZux8xTUdN34tyD3XnUG8cYwqKCxXtwg8Xp76wndJ0_JTKme-fwBz7Knbg>53652</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            qualifiers for auto_type in C
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

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

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

<pre>
    Hi,
when preparing for standardization in WG14 of this feature we ran into an inconsistency with gcc.
For declarations with `__auto_type` gcc accepts all C qualifiers in a reasonable way, whereas clang refuses `restrict` and `_Atomic`. The diagnostics that clang gives seem to indicate that these have simply not yet been considered 

> restrict requires a pointer or reference ('__auto_type' is invalid)
> _Atomic cannot be applied to type '__auto_type' which is not trivially copyable

A small example that compiles with gcc but not with clang:

```C
int main() {
  double x = 37;
  // clang doesn't accept that
  __auto_type restrict xr = &x;
  restrict __auto_type rx = &x;
  __auto_type _Atomic xa = x;
   _Atomic __auto_type ax = x;
}
```
Thanks
Jens


</pre>
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