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 refusesrestrict 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:

intmain() {doublex=37;// clang doesn't accept that__auto_type restrictxr=&x;  restrict__auto_typerx=&x;__auto_type _Atomicxa=x;   _Atomic__auto_typeax=x;}

Thanks
Jens