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
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++1y -triple x86_64-linux-gnu %s
// If there is a preceding declaration of the entity *in the same scope* in
// which the bound was specified, an omitted array bound is taken to be the
// same as in that earlier declaration
// rdar://13535367
namespace test0 {
extern "C" int array[];
void declare() { extern int array[100]; }
int value1 = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
extern "C" int array[];
int value2 = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
namespace test1 {
extern "C" int array[];
void test() {
{ extern int array[100]; }
extern int array[];
int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
}
namespace test2 {
void declare() { extern int array[100]; }
extern int array[];
int value = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
namespace test3 {
void test() {
{ extern int array[100]; }
extern int array[];
int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
}
namespace test4 {
extern int array[];
void test() {
extern int array[100];
int x = sizeof(array);
}
int y = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
namespace test5 {
void test() {
extern int array[100];
extern int array[];
int x = sizeof(array);
}
}
namespace test6 {
void test() {
extern int array[100];
{
extern int array[];
int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
int y = sizeof(array);
extern int array[];
int z = sizeof(array);
}
}
namespace test7 {
extern int array[100];
void test() {
extern int array[];
int x = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
int y = sizeof(array);
extern int array[];
int z = sizeof(array);
}
namespace test8 {
extern int array[];
void test() {
extern int array[100];
int x = sizeof(array);
}
int y = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
extern int array[];
int z = sizeof(array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int[]'}}
}
namespace dependent {
template<typename T> void f() {
extern int arr1[];
extern T arr1;
extern T arr2;
extern int arr2[];
static_assert(sizeof(arr1) == 12, "");
static_assert(sizeof(arr2) == 12, "");
// Use a failing test to ensure the type isn't considered dependent.
static_assert(sizeof(arr2) == 13, ""); // expected-error {{failed}} \
// expected-note {{evaluates to '12 == 13'}}
}
void g() { f<int[3]>(); } // expected-note {{in instantiation of}}
template<typename T> void h1() {
extern T arr3;
{
int arr3;
{
extern int arr3[];
// Detected in template definition.
(void)sizeof(arr3); // expected-error {{incomplete}}
}
}
}
template<typename T> void h2() {
extern int arr4[3];
{
int arr4;
{
extern T arr4;
// Detected in template instantiation.
(void)sizeof(arr4); // expected-error {{incomplete}}
}
}
}
void i() {
h1<int[3]>();
h2<int[]>(); // expected-note {{in instantiation of}}
}
int arr5[3];
template<typename T> void j() {
extern T arr5;
extern T arr6;
(void)sizeof(arr5); // expected-error {{incomplete}}
(void)sizeof(arr6); // expected-error {{incomplete}}
}
int arr6[3];
void k() { j<int[]>(); } // expected-note {{in instantiation of}}
template<typename T, typename U> void l() {
extern T arrX; // expected-note {{previous}}
extern U arrX; // expected-error {{different type: 'int[4]' vs 'int[3]'}}
(void)sizeof(arrX); // expected-error {{incomplete}}
}
void m() {
l<int[], int[3]>(); // ok
l<int[3], int[]>(); // ok
l<int[3], int[3]>(); // ok
l<int[3], int[4]>(); // expected-note {{in instantiation of}}
l<int[], int[]>(); // expected-note {{in instantiation of}}
}
template<typename T> void n() {
extern T n_var; // expected-error {{redeclaration of 'n_var' with a different type: 'double' vs 'int'}} expected-note {{previous}}
extern T n_fn(); // expected-error {{functions that differ only in their return type cannot be overloaded}} expected-note {{previous}}
}
template void n<int>();
template void n<double>(); // expected-note {{in instantiation of}}
template<typename T> void o() {
extern T o_var; // expected-note {{previous}}
extern T o_fn(); // expected-note {{previous}}
}
template void o<int>();
float o_var; // expected-error {{redefinition of 'o_var' with a different type: 'float' vs 'int'}}
float o_fn(); // expected-error {{functions that differ only in their return type cannot be overloaded}}
int p_var;
int p_fn();
template<typename T> void p() {
extern T p_var;
extern T p_fn();
}
}
namespace use_outside_ns {
namespace A {
extern int a[3];
extern int b[];
extern int c[3];
void f() {
extern int a[];
extern int b[3];
}
template<typename T> void x() {
extern T c;
extern T d;
}
extern int d[3];
template void x<int[]>();
}
int w = sizeof(A::a);
int x = sizeof(A::b); // expected-error {{incomplete}}
int y = sizeof(A::c);
int z = sizeof(A::d);
namespace A {
int g() { return sizeof(a); }
int h() { return sizeof(b); } // expected-error {{incomplete}}
int i() { return sizeof(c); }
int j() { return sizeof(d); }
}
}
extern int arr[];
void f1() { extern int arr[2]; } // expected-note {{previous}}
void f2() { extern int arr[3]; } // expected-error {{different type: 'int[3]' vs 'int[2]'}}
|
