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++17 %s
4 
5 // Verify that using an initializer list for a non-aggregate looks for
6 // constructors..
7 struct NonAggr1 { // expected-note 2 {{candidate constructor}}
8   NonAggr1(int, int) { } // expected-note {{candidate constructor}}
9 
10   int m;
11 };
12 
13 struct Base { };
14 struct NonAggr2 : public Base { // expected-note 0-3 {{candidate constructor}}
15   int m;
16 };
17 
18 class NonAggr3 { // expected-note 3 {{candidate constructor}}
19   int m;
20 };
21 
22 struct NonAggr4 { // expected-note 3 {{candidate constructor}}
23   int m;
24   virtual void f();
25 };
26 
27 NonAggr1 na1 = { 17 }; // expected-error{{no matching constructor for initialization of 'NonAggr1'}}
28 NonAggr2 na2 = { 17 };
29 NonAggr3 na3 = { 17 }; // expected-error{{no matching constructor for initialization of 'NonAggr3'}}
30 NonAggr4 na4 = { 17 }; // expected-error{{no matching constructor for initialization of 'NonAggr4'}}
31 #if __cplusplus <= 201402L
32 // expected-error@-4{{no matching constructor for initialization of 'NonAggr2'}}
33 #else
34 // expected-error@-6{{requires explicit braces}}
35 NonAggr2 na2b = { {}, 17 }; // ok
36 #endif
37 
38 // PR5817
39 typedef int type[][2];
40 const type foo = {0};
41 
42 // Vector initialization.
43 typedef short __v4hi __attribute__ ((__vector_size__ (8)));
44 __v4hi v1 = { (void *)1, 2, 3 }; // expected-error {{cannot initialize a vector element of type 'short' with an rvalue of type 'void *'}}
45 
46 // Array initialization.
47 int a[] = { (void *)1 }; // expected-error {{cannot initialize an array element of type 'int' with an rvalue of type 'void *'}}
48 
49 // Struct initialization.
50 struct S { int a; } s = { (void *)1 }; // expected-error {{cannot initialize a member subobject of type 'int' with an rvalue of type 'void *'}}
51 
52 // Check that we're copy-initializing the structs.
53 struct A {
54   A();
55   A(int);
56   ~A();
57 
58   A(const A&) = delete; // expected-note 0-2{{'A' has been explicitly marked deleted here}}
59 };
60 
61 struct B {
62   A a;
63 };
64 
65 struct C {
66   const A& a;
67 };
68 
69 void f() {
70   A as1[1] = { };
71   A as2[1] = { 1 };
72 #if __cplusplus <= 201402L
73   // expected-error@-2 {{copying array element of type 'A' invokes deleted constructor}}
74 #endif
75 
76   B b1 = { };
77   B b2 = { 1 };
78 #if __cplusplus <= 201402L
79   // expected-error@-2 {{copying member subobject of type 'A' invokes deleted constructor}}
80 #endif
81 
82   C c1 = { 1 };
83 }
84 
85 class Agg {
86 public:
87   int i, j;
88 };
89 
90 class AggAgg {
91 public:
92   Agg agg1;
93   Agg agg2;
94 };
95 
96 AggAgg aggagg = { 1, 2, 3, 4 };
97 
98 namespace diff_cpp14_dcl_init_aggr_example {
99   struct derived;
100   struct base {
101     friend struct derived;
102   private:
103     base();
104   };
105   struct derived : base {};
106 
107   derived d1{};
108 #if __cplusplus > 201402L
109   // expected-error@-2 {{private}}
110   // expected-note@-7 {{here}}
111 #endif
112   derived d2;
113 }
114 
115 namespace ProtectedBaseCtor {
116   // FIXME: It's unclear whether f() and g() should be valid in C++1z. What is
117   // the object expression in a constructor call -- the base class subobject or
118   // the complete object?
119   struct A {
120   protected:
121     A();
122   };
123 
124   struct B : public A {
125     friend B f();
126     friend B g();
127     friend B h();
128   };
129 
130   B f() { return {}; }
131 #if __cplusplus > 201402L
132   // expected-error@-2 {{protected default constructor}}
133   // expected-note@-12 {{here}}
134 #endif
135 
136   B g() { return {{}}; }
137 #if __cplusplus <= 201402L
138   // expected-error@-2 {{no matching constructor}}
139   // expected-note@-15 3{{candidate}}
140 #else
141   // expected-error@-5 {{protected default constructor}}
142   // expected-note@-21 {{here}}
143 #endif
144 
145   B h() { return {A{}}; }
146 #if __cplusplus <= 201402L
147   // expected-error@-2 {{no matching constructor}}
148   // expected-note@-24 3{{candidate}}
149 #endif
150   // expected-error@-5 {{protected constructor}}
151   // expected-note@-30 {{here}}
152 }
153 
154 namespace IdiomaticStdArrayInitDoesNotWarn {
155 #pragma clang diagnostic push
156 #pragma clang diagnostic warning "-Wmissing-braces"
157   template<typename T, int N> struct StdArray {
158     T contents[N];
159   };
160   StdArray<int, 3> x = {1, 2, 3};
161 
162   template<typename T, int N> struct ArrayAndSomethingElse {
163     T contents[N];
164     int something_else;
165   };
166   ArrayAndSomethingElse<int, 3> y = {1, 2, 3}; // expected-warning {{suggest braces}}
167 
168 #if __cplusplus >= 201703L
169   template<typename T, int N> struct ArrayAndBaseClass : StdArray<int, 3> {
170     T contents[N];
171   };
172   ArrayAndBaseClass<int, 3> z = {1, 2, 3}; // expected-warning {{suggest braces}}
173 
174   // It's not clear whether we should be warning in this case. If this
175   // pattern becomes idiomatic, it would be reasonable to suppress the
176   // warning here too.
177   template<typename T, int N> struct JustABaseClass : StdArray<T, N> {};
178   JustABaseClass<int, 3> w = {1, 2, 3}; // expected-warning {{suggest braces}}
179 #endif
180 
181 #pragma clang diagnostic pop
182 }
183 
184 namespace HugeArraysUseArrayFiller {
185   // All we're checking here is that initialization completes in a reasonable
186   // amount of time.
187   struct A { int n; int arr[1000 * 1000 * 1000]; } a = {1, {2}};
188 }
189 
190 namespace ElementDestructor {
191   // The destructor for each element of class type is potentially invoked
192   // (15.4 [class.dtor]) from the context where the aggregate initialization
193   // occurs. Produce a diagnostic if an element's destructor isn't accessible.
194 
195   class X { int f; ~X(); }; // expected-note {{implicitly declared private here}}
196   struct Y { X x; };
197 
198   void test0() {
199     auto *y = new Y {}; // expected-error {{temporary of type 'ElementDestructor::X' has private destructor}}
200   }
201 
202   struct S0 { int f; ~S0() = delete; }; // expected-note 3 {{'~S0' has been explicitly marked deleted here}}
203   struct S1 { S0 s0; int f; };
204 
205   S1 test1() {
206     auto *t = new S1 { .f = 1 }; // expected-error {{attempt to use a deleted function}}
207     return {2}; // expected-error {{attempt to use a deleted function}}
208   }
209 
210   // Check if the type of an array element has a destructor.
211   struct S2 { S0 a[4]; };
212 
213   void test2() {
214     auto *t = new S2 {1,2,3,4}; // expected-error {{attempt to use a deleted function}}
215   }
216 
217 #if __cplusplus >= 201703L
218   namespace BaseDestructor {
219      struct S0 { int f; ~S0() = delete; }; // expected-note {{'~S0' has been explicitly marked deleted here}}
220 
221     // Check destructor of base class.
222     struct S3 : S0 {};
223 
224     void test3() {
225       S3 s3 = {1}; // expected-error {{attempt to use a deleted function}}
226     }
227   }
228 #endif
229 
230   // A's destructor doesn't have to be accessible from the context of C's
231   // initialization.
232   struct A { friend struct B; private: ~A(); };
233   struct B { B(); A a; };
234   struct C { B b; };
235   C c = { B() };
236 }
237