1 // RUN: %clang_cc1 -std=c++2a -verify %s
2
3 struct A1 {
4 int x;
5 int &y; // expected-note 9{{because class 'A1' has a reference member}}
6
7 bool operator==(const A1&) const = default; // expected-warning {{implicitly deleted}} expected-note 2{{deleted here}}
8 bool operator<=>(const A1&) const = default; // expected-warning {{implicitly deleted}} expected-note 5{{deleted here}}
9 };
10 struct A2 {
11 int x;
12 int &y;
13
14 bool operator==(const A2&) const;
15 bool operator!=(const A2&) const = default;
16
17 int operator<=>(const A2&) const;
18 bool operator<(const A2&) const = default;
19 bool operator<=(const A2&) const = default;
20 bool operator>(const A2&) const = default;
21 bool operator>=(const A2&) const = default;
22 };
f(A1 a)23 void f(A1 a) {
24 void(a == a); // expected-error {{deleted}}
25 void(a != a); // expected-error {{deleted}}
26 void(a <=> a); // expected-error {{deleted}}
27 void(a < a); // expected-error {{deleted}}
28 void(a <= a); // expected-error {{deleted}}
29 void(a > a); // expected-error {{deleted}}
30 void(a >= a); // expected-error {{deleted}}
31 }
f(A2 a)32 void f(A2 a) {
33 void(a == a);
34 void(a != a);
35 void(a <=> a);
36 void(a < a);
37 void(a <= a);
38 void(a > a);
39 void(a >= a);
40 }
41
42 struct B1 {
43 struct {
44 int x;
45 int &y; // expected-note 2{{because class 'B1' has a reference member}}
46 };
47
48 bool operator==(const B1&) const = default; // expected-warning {{implicitly deleted}}
49 bool operator<=>(const B1&) const = default; // expected-warning {{implicitly deleted}}
50 };
51
52 struct B2 {
53 struct {
54 int x;
55 int &y;
56 };
57
58 bool operator==(const B2&) const;
59 bool operator!=(const B2&) const = default;
60
61 bool operator<=>(const B2&) const;
62 bool operator<(const B2&) const = default;
63 bool operator<=(const B2&) const = default;
64 bool operator>(const B2&) const = default;
65 bool operator>=(const B2&) const = default;
66 };
67
68 union C1 {
69 int a;
70
71 bool operator==(const C1&) const = default; // expected-warning {{implicitly deleted}} expected-note {{because 'C1' is a union }}
72 bool operator<=>(const C1&) const = default; // expected-warning {{implicitly deleted}} expected-note {{because 'C1' is a union }}
73 };
74
75 union C2 {
76 int a;
77
78 bool operator==(const C2&) const;
79 bool operator!=(const C2&) const = default;
80
81 bool operator<=>(const C2&) const;
82 bool operator<(const C2&) const = default;
83 bool operator<=(const C2&) const = default;
84 bool operator>(const C2&) const = default;
85 bool operator>=(const C2&) const = default;
86 };
87
88 struct D1 {
89 union {
90 int a;
91 };
92
93 bool operator==(const D1&) const = default; // expected-warning {{implicitly deleted}} expected-note {{because 'D1' is a union-like class}}
94 bool operator<=>(const D1&) const = default; // expected-warning {{implicitly deleted}} expected-note {{because 'D1' is a union-like class}}
95 };
96 struct D2 {
97 union {
98 int a;
99 };
100
101 bool operator==(const D2&) const;
102 bool operator!=(const D2&) const = default;
103
104 bool operator<=>(const D2&) const;
105 bool operator<(const D2&) const = default;
106 bool operator<=(const D2&) const = default;
107 bool operator>(const D2&) const = default;
108 bool operator>=(const D2&) const = default;
109 };
110
111 union E1 {
112 bool operator==(const E1&) const = default;
113 bool operator!=(const E1&) const = default;
114
115 bool operator<=>(const E1&) const = default;
116 bool operator<(const E1&) const = default;
117 bool operator<=(const E1&) const = default;
118 bool operator>(const E1&) const = default;
119 bool operator>=(const E1&) const = default;
120 };
121 union E2 {
122 bool operator==(const E2&) const = default;
123 bool operator!=(const E2&) const = default;
124
125 bool operator<=>(const E2&) const = default;
126 bool operator<(const E2&) const = default;
127 bool operator<=(const E2&) const = default;
128 bool operator>(const E2&) const = default;
129 bool operator>=(const E2&) const = default;
130 };
131
132 struct F;
133 bool operator==(const F&, const F&);
134 bool operator!=(const F&, const F&);
135 bool operator<=>(const F&, const F&);
136 bool operator<(const F&, const F&);
137 struct F {
138 union { int a; };
139 friend bool operator==(const F&, const F&) = default; // expected-error {{defaulting this equality comparison operator would delete it after its first declaration}} expected-note {{implicitly deleted because 'F' is a union-like class}}
140 friend bool operator!=(const F&, const F&) = default;
141 friend bool operator<=>(const F&, const F&) = default; // expected-error {{defaulting this three-way comparison operator would delete it after its first declaration}} expected-note {{implicitly deleted because 'F' is a union-like class}}
142 friend bool operator<(const F&, const F&) = default;
143 };
144