1 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
2 
3 struct one { char c; };
4 struct two { char c[2]; };
5 
6 namespace reference {
7   struct A {
8     int i1, i2;
9   };
10 
11   void single_init() {
12     const int &cri1a = {1};
13     const int &cri1b{1};
14 
15     int i = 1;
16     int &ri1a = {i};
17     int &ri1b{i};
18 
19     int &ri2 = {1}; // expected-error {{cannot bind to an initializer list temporary}}
20 
21     A a{1, 2};
22     A &ra1a = {a};
23     A &ra1b{a};
24   }
25 
26   void reference_to_aggregate() {
27     const A &ra1{1, 2};
28     A &ra2{1, 2}; // expected-error {{cannot bind to an initializer list temporary}}
29 
30     const int (&arrayRef)[] = {1, 2, 3};
31     static_assert(sizeof(arrayRef) == 3 * sizeof(int), "bad array size");
32   }
33 
34   struct B {
35     int i1;
36   };
37 
38   void call() {
39     one f(const int&);
40     f({1});
41 
42     one g(int&); // expected-note {{passing argument}}
43     g({1}); // expected-error {{cannot bind to an initializer list temporary}}
44     int i = 0;
45     g({i});
46 
47     void h(const B&);
48     h({1});
49 
50     void a(B&); // expected-note {{passing argument}}
51     a({1}); // expected-error {{cannot bind to an initializer list temporary}}
52     B b{1};
53     a({b});
54   }
55 
56   void overloading() {
57     one f(const int&);
58     two f(const B&);
59 
60     // First is identity conversion, second is user-defined conversion.
61     static_assert(sizeof(f({1})) == sizeof(one), "bad overload resolution");
62 
63     one g(int&);
64     two g(const B&);
65 
66     static_assert(sizeof(g({1})) == sizeof(two), "bad overload resolution");
67 
68     one h(const int&);
69     two h(const A&);
70 
71     static_assert(sizeof(h({1, 2})) == sizeof(two), "bad overload resolution");
72   }
73 
74   void edge_cases() {
75     // FIXME: very poor error message
76     int const &b({0}); // expected-error {{could not bind}}
77   }
78 
79 }
80 
81 namespace PR12182 {
82   void f(int const(&)[3]);
83 
84   void g() {
85       f({1, 2});
86   }
87 }
88 
89 namespace PR12660 {
90   const int &i { 1 };
91   struct S { S(int); } const &s { 2 };
92 }
93 
94 namespace b7891773 {
95   typedef void (*ptr)();
96   template <class T> void f();
97   int g(const ptr &);
98   int k = g({ f<int> });
99 }
100 
101 namespace inner_init {
102   struct A { int n; };
103   struct B { A &&r; };
104   B b1 { 0 }; // expected-error {{reference to type 'inner_init::A' could not bind to an rvalue of type 'int'}}
105   B b2 { { 0 } };
106   B b3 { { { 0 } } }; // expected-warning {{braces around scalar init}}
107 
108   struct C { C(int); };
109   struct D { C &&r; };
110   D d1 { 0 }; // ok, 0 implicitly converts to C
111   D d2 { { 0 } }; // ok, { 0 } calls C(0)
112   D d3 { { { 0 } } }; // ok, { { 0 } } calls C({ 0 })
113   D d4 { { { { 0 } } } }; // expected-warning {{braces around scalar init}}
114 
115   struct E { explicit E(int); }; // expected-note 2{{here}}
116   struct F { E &&r; };
117   F f1 { 0 }; // expected-error {{could not bind to an rvalue of type 'int'}}
118   F f2 { { 0 } }; // expected-error {{chosen constructor is explicit}}
119   F f3 { { { 0 } } }; // expected-error {{chosen constructor is explicit}}
120 }
121