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
|
// PR c++/89833
// Test to verify that constant array elements initialized to zero
// evaluate to zero regardless of the form of their initilizer,
// and irrespective whether it's explicit or implicit.
// { dg-do compile { target c++11 } }
// { dg-options "-Wall" }
static const char all_zero[1024] = { };
namespace test_int
{
constexpr int a[][3] = { { 0, 0 }, { 0 }, { } };
static_assert (sizeof a == sizeof (int) * 3 * 3);
static_assert ( a[0][0] == 0 && a[0][1] == 0 && a[0][2] == 0
&& a[1][0] == 0 && a[1][1] == 0 && a[1][2] == 0
&& a[2][0] == 0 && a[2][1] == 0 && a[2][2] == 0);
constexpr int b[3][3] = { { 0, 0 }, { 0 } };
static_assert (sizeof b == sizeof (int) * 3 * 3);
static_assert ( b[0][0] == 0 && b[0][1] == 0 && b[0][2] == 0
&& b[1][0] == 0 && b[1][1] == 0 && b[1][2] == 0
&& b[2][0] == 0 && b[2][1] == 0 && b[2][2] == 0);
constexpr int c[3][3] = { { } };
static_assert (sizeof c == sizeof (int) * 3 * 3);
static_assert ( c[0][0] == 0 && c[0][1] == 0 && c[0][2] == 0
&& c[1][0] == 0 && c[1][1] == 0 && c[1][2] == 0
&& c[2][0] == 0 && c[2][1] == 0 && c[2][2] == 0);
}
namespace test_char
{
constexpr char a[][3] = { { 0, 0 }, { 0 }, { } };
static_assert (sizeof a == sizeof (char) * 3 * 3);
static_assert ( a[0][0] == 0 && a[0][1] == 0 && a[0][2] == 0
&& a[1][0] == 0 && a[1][1] == 0 && a[1][2] == 0
&& a[2][0] == 0 && a[2][1] == 0 && a[2][2] == 0);
constexpr char b[3][3] = { { 0, 0 }, { 0 } };
static_assert (sizeof b == sizeof (char) * 3 * 3);
static_assert ( b[0][0] == 0 && b[0][1] == 0 && b[0][2] == 0
&& b[1][0] == 0 && b[1][1] == 0 && b[1][2] == 0
&& b[2][0] == 0 && b[2][1] == 0 && b[2][2] == 0);
constexpr char c[3][3] = { { } };
static_assert (sizeof c == sizeof (char) * 3 * 3);
static_assert ( c[0][0] == 0 && c[0][1] == 0 && c[0][2] == 0
&& c[1][0] == 0 && c[1][1] == 0 && c[1][2] == 0
&& c[2][0] == 0 && c[2][1] == 0 && c[2][2] == 0);
}
namespace test_string
{
constexpr char a[][3] = { "\0", "", { } };
static_assert (sizeof a == sizeof (char) * 3 * 3);
static_assert ( a[0][0] == 0 && a[0][1] == 0 && a[0][2] == 0
&& a[1][0] == 0 && a[1][1] == 0 && a[1][2] == 0
&& a[2][0] == 0 && a[2][1] == 0 && a[2][2] == 0);
constexpr char b[3][3] = { "\0", "" };
static_assert (sizeof b == sizeof (char) * 3 * 3);
static_assert ( b[0][0] == 0 && b[0][1] == 0 && b[0][2] == 0
&& b[1][0] == 0 && b[1][1] == 0 && b[1][2] == 0
&& b[2][0] == 0 && b[2][1] == 0 && b[2][2] == 0);
constexpr char c[3][3] = { };
static_assert (sizeof c == sizeof (char) * 3 * 3);
static_assert ( c[0][0] == 0 && c[0][1] == 0 && c[0][2] == 0
&& c[1][0] == 0 && c[1][1] == 0 && c[1][2] == 0
&& c[2][0] == 0 && c[2][1] == 0 && c[2][2] == 0);
}
namespace test_string_member
{
struct B { struct A { char a[5]; } a[2]; };
constexpr B b[3] =
{
/* [0] */
{
/* a = */
{
/* a[0] */ { { 0, 0, 0, 0, 0 } },
/* a[1] */ { { 0, 0 } }
}
},
/* [1] */
{
/* a */
{
/* a[0] */ { "\0\0\0\0" },
/* a[0] */ { "" }
}
},
};
static_assert ( b[0].a[0].a[0] == 0
&& b[0].a[0].a[1] == 0
&& b[0].a[0].a[2] == 0
&& b[0].a[0].a[3] == 0
&& b[0].a[0].a[4] == 0
&& b[0].a[1].a[0] == 0
&& b[0].a[1].a[1] == 0
&& b[0].a[1].a[2] == 0
&& b[0].a[1].a[3] == 0
&& b[0].a[1].a[4] == 0
&& b[1].a[0].a[0] == 0
&& b[1].a[0].a[1] == 0
&& b[1].a[0].a[2] == 0
&& b[1].a[0].a[3] == 0
&& b[1].a[0].a[4] == 0
&& b[2].a[0].a[0] == 0
&& b[2].a[0].a[1] == 0
&& b[2].a[0].a[2] == 0
&& b[2].a[0].a[3] == 0
&& b[2].a[0].a[4] == 0);
}
|
