1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++11 -Wno-c99-designator %s
// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++2a -Wno-c99-designator %s
// RUN: %clang_cc1 -fsyntax-only -Wno-unused-value -verify -std=c++2b -Wno-c99-designator %s
enum E { e };
constexpr int id(int n) { return n; }
class C {
int f() {
int foo, bar;
[]; // expected-error {{expected body of lambda expression}}
[+] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[foo+] {}; // expected-error {{expected ',' or ']' in lambda capture list}}
[foo,&this] {}; // expected-error {{'this' cannot be captured by reference}}
[&this] {}; // expected-error {{'this' cannot be captured by reference}}
[&,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[=,] {}; // expected-error {{expected variable name or 'this' in lambda capture list}}
[] {};
[=] (int i) {};
[&] (int) mutable -> void {};
[foo,bar] () { return 3; };
[=,&foo] () {};
[&,foo] () {};
[this] () {};
[] () -> class C { return C(); };
[] () -> enum E { return e; };
[] -> int { return 0; };
[] mutable -> int { return 0; };
#if __cplusplus <= 202002L
// expected-warning@-3 {{lambda without a parameter clause is a C++2b extension}}
// expected-warning@-3 {{is a C++2b extension}}
#endif
[](int) -> {}; // PR13652 expected-error {{expected a type}}
return 1;
}
void designator_or_lambda() {
typedef int T;
const int b = 0;
const int c = 1;
int d;
int a1[1] = {[b] (T()) {}}; // expected-error{{no viable conversion from '(lambda}}
int a2[1] = {[b] = 1 };
int a3[1] = {[b,c] = 1 }; // expected-error{{expected ']'}} expected-note {{to match}}
int a4[1] = {[&b] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'const int *'}}
int a5[3] = { []{return 0;}() };
int a6[1] = {[this] = 1 }; // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'C *'}}
int a7[1] = {[d(0)] { return d; } ()};
int a8[1] = {[d = 0] { return d; } ()};
int a10[1] = {[id(0)] { return id; } ()};
#if __cplusplus <= 201103L
// expected-warning@-4{{extension}}
// expected-warning@-4{{extension}}
// expected-warning@-4{{extension}}
#endif
int a9[1] = {[d = 0] = 1}; // expected-error{{is not an integral constant expression}}
#if __cplusplus >= 201402L
// expected-note@-2{{constant expression cannot modify an object that is visible outside that expression}}
#endif
int a11[1] = {[id(0)] = 1};
}
void delete_lambda(int *p) {
delete [] p;
delete [] (int*) { new int }; // ok, compound-literal, not lambda
delete [] { return new int; } (); // expected-error {{'[]' after delete interpreted as 'delete[]'}}
delete [&] { return new int; } (); // ok, lambda
delete []() { return new int; }(); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
delete [](E Enum) { return new int((int)Enum); }(e); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
#if __cplusplus > 201703L
delete []<int = 0>() { return new int; }(); // expected-error{{'[]' after delete interpreted as 'delete[]'}}
#endif
}
// We support init-captures in C++11 as an extension.
int z;
void init_capture() {
[n(0)] () mutable -> int { return ++n; };
[n{0}] { return; };
[a([&b = z]{})](){};
[n = 0] { return ++n; }; // expected-error {{captured by copy in a non-mutable}}
[n = {0}] { return; }; // expected-error {{<initializer_list>}}
#if __cplusplus <= 201103L
// expected-warning@-6{{extension}}
// expected-warning@-6{{extension}}
// expected-warning@-6{{extension}}
// expected-warning@-7{{extension}}
// expected-warning@-7{{extension}}
// expected-warning@-7{{extension}}
#endif
int x = 4;
auto y = [&r = x, x = x + 1]() -> int {
#if __cplusplus <= 201103L
// expected-warning@-2{{extension}}
// expected-warning@-3{{extension}}
#endif
r += 2;
return x + 2;
} ();
}
void attributes() {
[] __attribute__((noreturn)){};
#if __cplusplus <= 202002L
// expected-warning@-2 {{is a C++2b extension}}
#endif
[]() [[]]
mutable {}; // expected-error {{expected body of lambda expression}}
[]() [[]] {};
[]() [[]] -> void {};
[]() mutable [[]] -> void {};
[]() mutable noexcept [[]] -> void {};
// Testing GNU-style attributes on lambdas -- the attribute is specified
// before the mutable specifier instead of after (unlike C++11).
[]() __attribute__((noreturn)) mutable { while(1); };
[]() mutable
__attribute__((noreturn)) { while(1); }; // expected-error {{expected body of lambda expression}}
// Testing support for P2173 on adding attributes to the declaration
// rather than the type.
[][[]](){};
#if __cplusplus <= 202002L
// expected-warning@-2 {{an attribute specifier sequence in this position is a C++2b extension}}
#endif
#if __cplusplus > 201703L
[]<typename>[[]](){};
#if __cplusplus <= 202002L
// expected-warning@-2 {{an attribute specifier sequence in this position is a C++2b extension}}
#endif
#endif
[][[]]{};
#if __cplusplus <= 202002L
// expected-warning@-2 {{an attribute specifier sequence in this position is a C++2b extension}}
#endif
}
void missing_parens() {
[] mutable {};
[] noexcept {};
#if __cplusplus <= 202002L
// expected-warning@-3 {{is a C++2b extension}}
// expected-warning@-3 {{is a C++2b extension}}
#endif
}
};
template <typename>
void PR22122() {
[](int) -> {}; // expected-error {{expected a type}}
}
template void PR22122<int>();
namespace PR42778 {
struct A {
template <class F> A(F&&) {}
};
struct S {
void mf() { A{[*this]{}}; }
#if __cplusplus < 201703L
// expected-warning@-2 {{C++17 extension}}
#endif
};
}
struct S {
template <typename T>
void m (T x =[0); // expected-error{{expected variable name or 'this' in lambda capture list}}
} s;
struct U {
template <typename T>
void m_fn1(T x = 0[0); // expected-error{{expected ']'}} expected-note{{to match this '['}}
} *U;
|
