7   struct outer {  struct
23     operator decltype(outer::middle::inner()) ();
24     operator decltype(outer::middle())::inner2 ();
25     operator decltype(outer())::middle::inner3 ();
26     str(int (decltype(outer::middle::inner())::*n)(),
27              int (decltype(outer::middle())::inner::*o)(),
28              int (decltype(outer())::middle::inner::*p)());
31   decltype(outer::middle::inner()) a;
33 …a.decltype(outer::middle())::mfunc(); // expected-error{{'PR10127::outer::middle::mfunc' is not a …  in scope()  argument
34     a.decltype(outer::middle::inner())::func();  in scope()
35     a.decltype(outer::middle())::inner::func();  in scope()
36     a.decltype(outer())::middle::inner::func();  in scope()
38     a.decltype(outer())::middle::inner::~inner();  in scope()
40     decltype(outer())::middle::inner().func();  in scope()
42   decltype(outer::middle())::inner b;
43   decltype(outer())::middle::inner c;
44   decltype(outer())::fail d; // expected-error{{no type named 'fail' in 'PR10127::outer'}}
45   decltype(outer())::fail::inner e; // expected-error{{no member named 'fail' in 'PR10127::outer'}}
50 …decltype(int())::PR10127::outer i; // expected-error{{'decltype(int())' (aka 'int') is not a class…
53   outer::middle k = decltype(outer())::middle();
54   outer::middle::inner l = decltype(outer())::middle::inner();
62   template class templ<outer>;
74     enum E : decltype(outer())::td_int(4);
75     enum F : decltype(outer())::td_int;