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 | struct X {}; |
75 | |
76 | void edge_cases() { |
77 | int const &b({0}); // expected-error {{cannot initialize reference type 'const int &' with a parenthesized initializer list}} |
78 | const int (&arr)[3] ({1, 2, 3}); // expected-error {{cannot initialize reference type 'const int (&)[3]' with a parenthesized initializer list}} |
79 | const X &x({}); // expected-error {{cannot initialize reference type 'const reference::X &' with a parenthesized initializer list}} |
80 | } |
81 | |
82 | template<typename T> void dependent_edge_cases() { |
83 | T b({}); // expected-error-re 3{{cannot initialize reference type {{.*}} with a parenthesized init}} |
84 | T({}); // expected-error-re 3{{cannot initialize reference type {{.*}} with a parenthesized init}} |
85 | } |
86 | template void dependent_edge_cases<X>(); // ok |
87 | template void dependent_edge_cases<const int&>(); // expected-note {{instantiation of}} |
88 | template void dependent_edge_cases<const int(&)[1]>(); // expected-note {{instantiation of}} |
89 | template void dependent_edge_cases<const X&>(); // expected-note {{instantiation of}} |
90 | } |
91 | |
92 | namespace PR12182 { |
93 | void f(int const(&)[3]); |
94 | |
95 | void g() { |
96 | f({1, 2}); |
97 | } |
98 | } |
99 | |
100 | namespace PR12660 { |
101 | const int &i { 1 }; |
102 | struct S { S(int); } const &s { 2 }; |
103 | } |
104 | |
105 | namespace b7891773 { |
106 | typedef void (*ptr)(); |
107 | template <class T> void f(); |
108 | int g(const ptr &); |
109 | int k = g({ f<int> }); |
110 | } |
111 | |
112 | namespace inner_init { |
113 | struct A { int n; }; |
114 | struct B { A &&r; }; |
115 | B b1 { 0 }; // expected-error {{reference to type 'inner_init::A' could not bind to an rvalue of type 'int'}} |
116 | B b2 { { 0 } }; |
117 | B b3 { { { 0 } } }; // expected-warning {{braces around scalar init}} |
118 | |
119 | struct C { C(int); }; // expected-note 2{{candidate constructor (the implicit}} \ |
120 | // expected-note {{candidate constructor not viable: cannot convert initializer list argument to 'int'}} |
121 | struct D { C &&r; }; |
122 | D d1 { 0 }; // ok, 0 implicitly converts to C |
123 | D d2 { { 0 } }; // ok, { 0 } calls C(0) |
124 | D d3 { { { 0 } } }; // ok, { { 0 } } calls C({ 0 }), expected-warning {{braces around scalar init}} |
125 | D d4 { { { { 0 } } } }; // expected-error {{no matching constructor for initialization of 'inner_init::C &&'}} |
126 | |
127 | struct E { explicit E(int); }; // expected-note 2{{here}} |
128 | struct F { E &&r; }; |
129 | F f1 { 0 }; // expected-error {{could not bind to an rvalue of type 'int'}} |
130 | F f2 { { 0 } }; // expected-error {{chosen constructor is explicit}} |
131 | F f3 { { { 0 } } }; // expected-error {{chosen constructor is explicit}} |
132 | } |
133 | |
134 | namespace PR20844 { |
135 | struct A {}; |
136 | struct B { operator A&(); } b; |
137 | A &a{b}; // expected-error {{excess elements}} expected-note {{in initialization of temporary of type 'PR20844::A'}} |
138 | } |
139 | |
140 | namespace PR21834 { |
141 | const int &a = (const int &){0}; // expected-error {{cannot bind to an initializer list}} |
142 | } |
143 | |