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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
// { dg-do compile }
// { dg-options "-Wno-error=pedantic" }
// Test to verify flexible array members handling in base and derived
// classes.
#include "flexary.h"
template <class T>
struct S_no_diag: T {
char a[]; // cannot be diagnosed unless/until T is known
};
template <class T>
struct STx_1: T {
char a[]; // { dg-error "flexible array member" }
};
template <class T, int I>
struct STI: T {
char a[I]; // cannot be diagnosed unless/until T and I are known
};
template <class T, int I>
struct STIx: T {
char a[I];
};
template <int> struct E { };
STx_1<E<0> > stx_empty_1;
STIx<E<0>, 0> stix_empty_1;
// Verify that a sole flexible array member in a class with all empty
// base classes is diagnosed.
struct E1: E<0>, E<1> { };
struct E2: E<2>, E<3> { };
struct D1: E1, E2
{
char a[]; // { dg-error "flexible array member" }
};
struct NE { size_t i; };
struct A1x { int n, a[]; };
struct D2: A1x, E1, E2 { };
// Verify that the offset of the flexible array member is equal
// to the size of each of the valid structs.
ASSERT_AT_END (D2, a);
struct D3: E1, A1x, E2 { };
ASSERT_AT_END (D3, a);
struct D4: E1, E2, A1x { };
ASSERT_AT_END (D4, a);
// Class with non-static data members and at least one base class
// with such a member is not a standard layout class. The warning
// below is benign since GCC computes the expected value.
struct D5: E1, E2, NE { char a[]; };
ASSERT_AT_END (D5, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct A2x_1 {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D6." }
};
struct A2x_2 {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D7." }
};
struct A2x_3 {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D8." }
};
// Verify that the flexible array member in A2x above is diagnosed
// for each of the three struct defintions below which also derive
// from another struct with a flexible array member.
struct D6: A2x_1, E1, A1x { };
struct D7: E1, A2x_2, E2, A1x { };
struct D8: E1, E2, A2x_3, A1x { };
struct DA2x: A2x_1 { };
struct D9: DA2x, E1, E2 { };
ASSERT_AT_END (D9, a);
struct D10: E1, DA2x, E2 { };
ASSERT_AT_END (D10, a);
struct D11: E1, E2, DA2x { };
ASSERT_AT_END (D11, a);
struct A3x {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D12.| D13.| D14.| D15." }
};
// Verify that the flexible array member in A3x above is diagnosed
// for each of the three struct defintions below which also derive
// from another struct with a non-static member.
struct D12: A3x, E1, NE { };
struct D13: E1, A3x, NE { };
struct D14: E1, E2, A3x, NE { };
struct D15: E1, E2, NE, A3x { };
struct A4x {
A4x ();
~A4x ();
size_t n;
struct AS {
AS (int);
~AS ();
size_t i;
} a[];
};
struct D16: A4x, E1, E2 { };
ASSERT_AT_END (D16, a);
struct D17: E1, A4x, E2 { };
ASSERT_AT_END (D17, a);
struct D18: E1, E2, A4x { };
ASSERT_AT_END (D18, a);
struct DA4x: A4x { };
struct D19: DA4x, E1, E2 { };
ASSERT_AT_END (D19, a);
struct D20: E1, DA4x, E2 { };
ASSERT_AT_END (D20, a);
struct D21: E1, E2, DA4x { };
ASSERT_AT_END (D21, a);
struct A5x {
A5x (int);
virtual ~A5x ();
size_t n;
struct AS {
AS (int);
~AS ();
size_t i;
} a[];
};
struct D22: A5x, E1, E2 { };
ASSERT_AT_END (D22, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct D23: E1, A5x, E2 { };
ASSERT_AT_END (D23, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct D24: E1, E2, A5x { };
ASSERT_AT_END (D24, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct DA5x: A5x { };
struct D25: DA5x, E1, E2 { };
ASSERT_AT_END (D25, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct D26: E1, DA5x, E2 { };
ASSERT_AT_END (D26, a); // { dg-warning "'offsetof' within non-standard-layout" }
struct D27: E1, E2, DA5x { };
ASSERT_AT_END (D27, a); // { dg-warning "'offsetof' within non-standard-layout" }
// Verfify that a flexible array member is diagnosed even when deep
// in the base class hierarchy.
struct A6x {
size_t n;
size_t a[]; // { dg-error "not at end of .struct D28.| D29." }
};
struct AA6x: A6x { };
struct NE1: NE { };
struct NE2: NE { };
struct D28: NE1, AA6x { };
struct D29: AA6x, NE1 { };
struct A7x {
size_t n;
size_t a[]; // { dg-error "flexible array member .A7x::a. not at end of .struct D33." }
};
// Verify that a flexible array member in a virtual base class is not
// diagnosed.
struct DA7xV1: virtual A7x { };
struct DA7xV2: virtual A7x { };
struct D30: DA7xV1, DA7xV2 { };
struct D31: DA7xV1, DA7xV2 { };
struct D32: D30, D31 { };
// Verify the diagnostic when the flexible array is in an anonymous struct.
struct A8x {
struct { // { dg-message "next member .A8x::<unnamed struct> A8x::<anonymous>. declared here" }
size_t n;
size_t a[];
};
};
struct D33: // { dg-message "in the definition of .struct D33." }
A7x, A8x { };
|
