1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
2 
3 struct global {
4 };
5 
6 namespace PR10127 {
7   struct outer {
8     struct middle {
9       struct inner {
10         int func();
11         int i;
12       };
13       struct inner2 {
14       };
15       struct inner3 {
16       };
17       int mfunc();
18     };
19     typedef int td_int;
20   };
21 
22   struct str {
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)());
29   };
30 
31   decltype(outer::middle::inner()) a;
scope()32   void scope() {
33     a.decltype(outer::middle())::mfunc(); // expected-error{{'PR10127::outer::middle::mfunc' is not a member of class 'decltype(outer::middle::inner())'}}
34     a.decltype(outer::middle::inner())::func();
35     a.decltype(outer::middle())::inner::func();
36     a.decltype(outer())::middle::inner::func();
37 
38     a.decltype(outer())::middle::inner::~inner();
39 
40     decltype(outer())::middle::inner().func();
41   }
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'}}
46   decltype()::fail f; // expected-error{{expected expression}}
47   decltype()::middle::fail g; // expected-error{{expected expression}}
48 
49   decltype(int()) h;
50   decltype(int())::PR10127::outer i; // expected-error{{'decltype(int())' (aka 'int') is not a class, namespace, or enumeration}}
51   decltype(int())::global j; // expected-error{{'decltype(int())' (aka 'int') is not a class, namespace, or enumeration}}
52 
53   outer::middle k = decltype(outer())::middle();
54   outer::middle::inner l = decltype(outer())::middle::inner();
55 
56   template<typename T>
57   struct templ {
58     typename decltype(T())::middle::inner x; // expected-error{{type 'decltype(int())' (aka 'int') cannot be used prior to '::' because it has no members}}
59   };
60 
61   template class templ<int>; // expected-note{{in instantiation of template class 'PR10127::templ<int>' requested here}}
62   template class templ<outer>;
63 
64   enum class foo {
65     bar,
66     baz
67   };
68 
69   foo m = decltype(foo::bar)::baz;
70 
71   enum E {
72   };
73   struct bar {
74     enum E : decltype(outer())::td_int(4);
75     enum F : decltype(outer())::td_int;
76     enum G : decltype; // expected-error{{expected '(' after 'decltype'}}
77   };
78 }
79