1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2 
3 struct non_trivial {
4   non_trivial();
5   non_trivial(const non_trivial&);
6   non_trivial& operator = (const non_trivial&);
7   ~non_trivial();
8 };
9 
10 union bad_union {
11   non_trivial nt; // expected-note {{non-trivial default constructor}}
12 };
13 bad_union u; // expected-error {{call to implicitly-deleted default constructor}}
14 union bad_union2 { // expected-note {{all data members are const-qualified}}
15   const int i;
16 };
17 bad_union2 u2; // expected-error {{call to implicitly-deleted default constructor}}
18 
19 struct bad_anon {
20   union {
21     non_trivial nt; // expected-note {{non-trivial default constructor}}
22   };
23 };
24 bad_anon a; // expected-error {{call to implicitly-deleted default constructor}}
25 struct bad_anon2 {
26   union { // expected-note {{all data members of an anonymous union member are const-qualified}}
27     const int i;
28   };
29 };
30 bad_anon2 a2; // expected-error {{call to implicitly-deleted default constructor}}
31 
32 // This would be great except that we implement
33 union good_union {
34   const int i;
35   float f;
36 };
37 good_union gu;
38 struct good_anon {
39   union {
40     const int i;
41     float f;
42   };
43 };
44 good_anon ga;
45 
46 struct good : non_trivial {
47   non_trivial nt;
48 };
49 good g;
50 
51 struct bad_const {
52   const good g; // expected-note {{field 'g' of const-qualified type 'const good' would not be initialized}}
53 };
54 bad_const bc; // expected-error {{call to implicitly-deleted default constructor}}
55 
56 struct good_const {
57   const non_trivial nt;
58 };
59 good_const gc;
60 
61 struct no_default {
62   no_default() = delete; // expected-note 5{{deleted here}}
63 };
64 struct no_dtor {
65   ~no_dtor() = delete; // expected-note 2{{deleted here}}
66 };
67 
68 struct bad_field_default {
69   no_default nd; // expected-note {{field 'nd' has a deleted default constructor}}
70 };
71 bad_field_default bfd; // expected-error {{call to implicitly-deleted default constructor}}
72 struct bad_base_default : no_default { // expected-note {{base class 'no_default' has a deleted default constructor}}
73 };
74 bad_base_default bbd; // expected-error {{call to implicitly-deleted default constructor}}
75 
76 struct bad_field_dtor {
77   no_dtor nd; // expected-note {{field 'nd' has a deleted destructor}}
78 };
79 bad_field_dtor bfx; // expected-error {{call to implicitly-deleted default constructor}}
80 struct bad_base_dtor : no_dtor { // expected-note {{base class 'no_dtor' has a deleted destructor}}
81 };
82 bad_base_dtor bbx; // expected-error {{call to implicitly-deleted default constructor}}
83 
84 struct ambiguous_default {
85   ambiguous_default();
86   ambiguous_default(int = 2);
87 };
88 struct has_amb_field {
89   ambiguous_default ad; // expected-note {{field 'ad' has multiple default constructors}}
90 };
91 has_amb_field haf; // expected-error {{call to implicitly-deleted default constructor}}
92 
93 class inaccessible_default {
94   inaccessible_default();
95 };
96 struct has_inacc_field {
97   inaccessible_default id; // expected-note {{field 'id' has an inaccessible default constructor}}
98 };
99 has_inacc_field hif; // expected-error {{call to implicitly-deleted default constructor}}
100 
101 class friend_default {
102   friend struct has_friend;
103   friend_default();
104 };
105 struct has_friend {
106   friend_default fd;
107 };
108 has_friend hf;
109 
110 struct defaulted_delete {
111   no_default nd; // expected-note 2{{because field 'nd' has a deleted default constructor}}
112   defaulted_delete() = default; // expected-note{{implicitly deleted here}} expected-warning {{implicitly deleted}}
113 };
114 defaulted_delete dd; // expected-error {{call to implicitly-deleted default constructor}}
115 
116 struct late_delete {
117   no_default nd; // expected-note {{because field 'nd' has a deleted default constructor}}
118   late_delete();
119 };
120 late_delete::late_delete() = default; // expected-error {{would delete it}}
121 
122 // See also rdar://problem/8125400.
123 namespace empty {
124   static union {}; // expected-warning {{does not declare anything}}
125   static union { union {}; }; // expected-warning {{does not declare anything}}
126   static union { struct {}; }; // expected-warning {{does not declare anything}}
127   static union { union { union {}; }; }; // expected-warning {{does not declare anything}}
128   static union { union { struct {}; }; }; // expected-warning {{does not declare anything}}
129   static union { struct { union {}; }; }; // expected-warning {{does not declare anything}}
130   static union { struct { struct {}; }; }; // expected-warning {{does not declare anything}}
131 }
132