1 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s |
2 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++14 %s |
3 | // RUN: %clang_cc1 -fsyntax-only -verify -std=c++1z %s |
4 | |
5 | // An aggregate is an array or a class... |
6 | struct Aggr { |
7 | private: |
8 | static const int n; |
9 | void f(); |
10 | protected: |
11 | struct Inner { int m; }; |
12 | public: |
13 | bool &br; |
14 | }; |
15 | bool b; |
16 | Aggr ag = { b }; |
17 | |
18 | // with no user-provided constructors, ... |
19 | struct NonAggr1a { // expected-note 2 {{candidate constructor}} |
20 | NonAggr1a(int, int); // expected-note {{candidate constructor}} |
21 | int k; |
22 | }; |
23 | NonAggr1a na1a = { 42 }; // expected-error {{no matching constructor for initialization of 'NonAggr1a'}} |
24 | |
25 | struct NonAggr1b { |
26 | NonAggr1b(const NonAggr1b &); // expected-note {{candidate constructor}} |
27 | int k; |
28 | }; |
29 | NonAggr1b na1b = { 42 }; // expected-error {{no matching constructor for initialization of 'NonAggr1b'}} |
30 | |
31 | // no brace-or-equal-initializers for non-static data members, ... |
32 | // Note, this bullet was removed in C++1y. |
33 | struct NonAggr2 { |
34 | int m = { 123 }; |
35 | }; |
36 | NonAggr2 na2 = { 42 }; |
37 | #if __cplusplus < 201402L |
38 | // expected-error@-2 {{no matching constructor for initialization of 'NonAggr2'}} |
39 | // expected-note@-6 3 {{candidate constructor}} |
40 | #endif |
41 | |
42 | // no private... |
43 | struct NonAggr3 { // expected-note 3 {{candidate constructor}} |
44 | private: |
45 | int n; |
46 | }; |
47 | NonAggr3 na3 = { 42 }; // expected-error {{no matching constructor for initialization of 'NonAggr3'}} |
48 | |
49 | // or protected non-static data members, ... |
50 | struct NonAggr4 { // expected-note 3 {{candidate constructor}} |
51 | protected: |
52 | int n; |
53 | }; |
54 | NonAggr4 na4 = { 42 }; // expected-error {{no matching constructor for initialization of 'NonAggr4'}} |
55 | |
56 | // [pre-C++1z] no base classes, ... |
57 | struct NonAggr5 : Aggr { |
58 | }; |
59 | NonAggr5 na5 = { b }; |
60 | #if __cplusplus <= 201402L |
61 | // expected-error@-2 {{no matching constructor for initialization of 'NonAggr5'}} |
62 | // expected-note@-5 3 {{candidate constructor}} |
63 | #endif |
64 | template<typename...BaseList> |
65 | struct MaybeAggr5a : BaseList... {}; |
66 | MaybeAggr5a<> ma5a0 = {}; // ok |
67 | MaybeAggr5a<Aggr> ma5a1 = {}; // ok in C++17 |
68 | MaybeAggr5a<NonAggr2> m5a2 = {}; // ok, aggregate init in C++17, default ctor in C++11 and C++14 |
69 | MaybeAggr5a<NonAggr2> m5a3 = {0}; // ok in C++17, overrides default member initializer in base class |
70 | #if __cplusplus <= 201402L |
71 | // expected-error@-4 {{call to implicitly-deleted default constructor of 'MaybeAggr5a<Aggr>'}} |
72 | // expected-note@-7 {{default constructor of 'MaybeAggr5a<Aggr>' is implicitly deleted because base class 'Aggr' has a deleted default constructor}} |
73 | // expected-note@13 {{default constructor of 'Aggr' is implicitly deleted because field 'br' of reference type 'bool &' would not be initialized}} |
74 | // expected-error@-5 {{no matching constructor}} expected-note@-9 3{{candidate}} |
75 | #else |
76 | // expected-error@-9 {{reference member of type 'bool &' uninitialized}} |
77 | // expected-note@13 {{uninitialized reference member is here}} |
78 | #endif |
79 | |
80 | // [C++1z] no virtual, protected, or private base classes, ... |
81 | struct NonAggr5b : virtual Aggr {}; // expected-note 3{{candidate}} |
82 | NonAggr5b na5b = { b }; // expected-error {{no matching constructor}} |
83 | struct NonAggr5c : NonAggr5b {}; // expected-note 3{{candidate}} |
84 | NonAggr5c na5c = { b }; // expected-error {{no matching constructor}} |
85 | struct NonAggr5d : protected Aggr {}; // expected-note 3{{candidate}} |
86 | NonAggr5d na5d = { b }; // expected-error {{no matching constructor}} |
87 | struct NonAggr5e : private Aggr {}; // expected-note 3{{candidate}} |
88 | NonAggr5e na5e = { b }; // expected-error {{no matching constructor}} |
89 | class NonAggr5f : Aggr {}; // expected-note 3{{candidate}} |
90 | NonAggr5f na5f = { b }; // expected-error {{no matching constructor}} |
91 | |
92 | // [C++1z] (the base class need not itself be an aggregate) |
93 | struct MaybeAggr5g : NonAggr1a {}; |
94 | MaybeAggr5g ma5g1 = { 1 }; |
95 | MaybeAggr5g ma5g2 = { {1, 2} }; |
96 | MaybeAggr5g ma5g3 = {}; |
97 | #if __cplusplus <= 201402L |
98 | // expected-error@-4 {{no matching constructor}} // expected-note@-5 3{{candidate}} |
99 | // expected-error@-4 {{no matching constructor}} // expected-note@-6 3{{candidate}} |
100 | // expected-error@-4 {{implicitly-deleted default constructor}} expected-note@-7 {{no default constructor}} |
101 | #else |
102 | // expected-error@-8 {{no viable conversion from 'int' to 'NonAggr1a'}} expected-note@19 2{{candidate}} |
103 | // (ok) |
104 | // expected-error@-8 {{no matching constructor}} expected-note@19 2{{candidate}} expected-note@20 {{candidate}} |
105 | #endif |
106 | |
107 | // and no virtual functions. |
108 | struct NonAggr6 { // expected-note 3 {{candidate constructor}} |
109 | virtual void f(); |
110 | int n; |
111 | }; |
112 | NonAggr6 na6 = { 42 }; // expected-error {{no matching constructor for initialization of 'NonAggr6'}} |
113 | |
114 | struct NonAggr7 : NonAggr6 { // expected-note 3 {{candidate constructor}} |
115 | int n; |
116 | }; |
117 | NonAggr7 na7 = {{}, 42}; // expected-error {{no matching constructor for initialization of 'NonAggr7'}} |
118 | |
119 | struct DefaultedAggr { |
120 | int n; |
121 | |
122 | DefaultedAggr() = default; |
123 | DefaultedAggr(const DefaultedAggr &) = default; |
124 | DefaultedAggr(DefaultedAggr &&) = default; |
125 | DefaultedAggr &operator=(const DefaultedAggr &) = default; |
126 | DefaultedAggr &operator=(DefaultedAggr &&) = default; |
127 | ~DefaultedAggr() = default; |
128 | }; |
129 | DefaultedAggr da = { 42 } ; |
130 | |
131 | struct ExplicitDefaultedAggr { |
132 | int n; |
133 | explicit ExplicitDefaultedAggr() = default; // expected-note {{candidate}} |
134 | ExplicitDefaultedAggr(const ExplicitDefaultedAggr &) = default; // expected-note {{candidate}} |
135 | ExplicitDefaultedAggr(ExplicitDefaultedAggr &&) = default; // expected-note {{candidate}} |
136 | }; |
137 | ExplicitDefaultedAggr eda = { 42 }; // expected-error {{no matching constructor}} |
138 | ExplicitDefaultedAggr eda2{}; |
139 | |
140 | struct DefaultedBase { |
141 | int n; |
142 | DefaultedBase() = default; |
143 | DefaultedBase(DefaultedBase const&) = default; |
144 | DefaultedBase(DefaultedBase &&) = default; |
145 | }; |
146 | |
147 | struct InheritingConstructors : DefaultedBase { // expected-note 3 {{candidate}} |
148 | using DefaultedBase::DefaultedBase; |
149 | }; |
150 | InheritingConstructors ic = { 42 }; // expected-error {{no matching constructor}} |
151 | |
152 | struct NonInheritingConstructors : DefaultedBase {}; // expected-note 0+ {{candidate}} |
153 | NonInheritingConstructors nic = { 42 }; |
154 | #if __cplusplus <= 201402L |
155 | // expected-error@-2 {{no matching constructor}} |
156 | #endif |
157 | |
158 | struct NonAggrBase { |
159 | NonAggrBase(int) {} |
160 | }; |
161 | struct HasNonAggrBase : NonAggrBase {}; // expected-note 0+ {{candidate}} |
162 | HasNonAggrBase hnab = {42}; |
163 | #if __cplusplus <= 201402L |
164 | // expected-error@-2 {{no matching constructor}} |
165 | #endif |
166 | |