designated-initializers.c revision 58e22b19add744ff2094fbdc366a39709680c35d 
1// RUN: clang -fsyntax-only -verify -arch x86_64 %s
2
3int complete_array_from_init[] = { 1, 2, [10] = 5, 1, 2, [5] = 2, 6 };
4
5int complete_array_from_init_check[((sizeof(complete_array_from_init) / sizeof(int)) == 13)? 1 : -1];
6
7int iarray[10] = {
8  [0] = 1,
9  [1 ... 5] = 2,
10  [ 6 ... 6 ] = 3,
11  [ 8 ... 7 ] = 4, // expected-error{{array designator range [8, 7] is empty}}
12  [10] = 5,
13  [-1] = 6 // expected-error{{array designator value '-1' is negative}}
14};
15
16int iarray2[10] = {
17  [10] = 1, // expected-error{{array designator index (10) exceeds array bounds (10)}}
18};
19
20int iarray3[10] = {
21  [5 ... 12] = 2 // expected-error{{array designator index (12) exceeds array bounds (10)}}\
22                // expected-warning{{side effects due to the GNU array-range designator extension may occur multiple times}}
23};
24
25struct point {
26  double x;
27  double y;
28};
29
30struct point p1 = {
31  .y = 1.0,
32  x: 2.0,
33  .a = 4.0, // expected-error{{field designator 'a' does not refer to any field in type 'struct point'}}
34};
35
36struct point p2 = {
37  [1] = 1.0 // expected-error{{array designator cannot initialize non-array type}}
38};
39
40struct point array[10] = {
41  [0].x = 1.0,
42  [1].y = 2.0,
43  [2].z = 3.0, // expected-error{{field designator 'z' does not refer to any field in type 'struct point'}}
44};
45
46struct point array2[10] = {
47  [10].x = 2.0, // expected-error{{array designator index (10) exceeds array bounds (10)}}
48  [4 ... 5].y = 2.0, // expected-warning{{side effects due to the GNU array-range designator extension may occur multiple times}}
49  [4 ... 6] = { .x = 3, .y = 4.0 } // expected-warning{{side effects due to the GNU array-range designator extension may occur multiple times}}
50};
51
52struct point array3[10] = {
53  .x = 5 // expected-error{{field designator cannot initialize a non-struct, non-union type}}
54};
55
56struct rect {
57  struct point top_left;
58  struct point bottom_right;
59};
60
61struct rect window = { .top_left.x = 1.0 };
62
63struct rect windows[] = {
64  [2].top_left = { 1.0, 2.0 },
65  [4].bottom_right = { .y = 1.0 },
66  { { .y = 7.0, .x = 8.0 }, { .x = 5.0 } },
67  [3] = { .top_left = { 1.1, 2.2 }, .bottom_right = { .y = 1.1 } }
68};
69
70int windows_size[((sizeof(windows) / sizeof(struct rect)) == 6)? 1 : -1];
71
72struct rect windows_bad[3] = {
73  [2].top_left = { { .x = 1.1 } }, // expected-error{{designator in initializer for scalar type}}
74  [1].top_left = { .x = 1.1 }
75};
76
77struct gui {
78  struct rect windows[10];
79};
80
81struct gui gui[] = {
82  [5].windows[3].top_left.x = { 7.0 } // expected-warning{{braces around scalar initializer}}
83};
84
85struct translator {
86  struct wonky { int * ptr; } wonky ;
87  struct rect window;
88  struct point offset;
89} tran = {
90  .window = { .top_left = { 1.0, 2.0 } },
91  { .x = 5.0, .y = 6.0 },
92  .wonky = { 0 }
93};
94
95int anint;
96struct {int x,*y;} z[] = {[0].x = 2, &z[0].x};
97
98struct outer { struct inner { int x, *y; } in, *inp; } zz[] = {
99  [0].in.x = 2, &zz[0].in.x, &zz[0].in,
100  0, &anint, &zz[1].in,
101  [3].in = { .y = &anint, .x = 17 },
102  [7].in.y = &anint, &zz[0].in,
103  [4].in.y = &anint, [5].in.x = 12
104};
105
106int zz_sizecheck[sizeof(zz) / sizeof(struct outer) == 8? 1 : -1 ];
107
108struct disklabel_ops {
109  struct {} type;
110  int labelsize;
111};
112
113struct disklabel_ops disklabel64_ops = {
114  .labelsize = sizeof(struct disklabel_ops)
115};
116
117// PR clang/3378
118int bitwidth[] = { [(long long int)1] = 5, [(short int)2] = 2 };
119int a[]= { [sizeof(int)] = 0 };
120int a2[]= { [0 ... sizeof(int)] = 0 }; // expected-warning{{side effects due to the GNU array-range designator extension may occur multiple times}}
121
122// Test warnings about initializers overriding previous initializers
123struct X {
124  int a, b, c;
125};
126
127int counter = 0;
128int get8() { ++counter; return 8; }
129
130void test() {
131  struct X xs[] = {
132    [0] = (struct X){1, 2}, // expected-note{{previous initialization is here}}
133    [0].c = 3,  // expected-warning{{subobject initialization overrides initialization of other fields within its enclosing subobject}}
134    (struct X) {4, 5, 6}, // expected-note{{previous initialization is here}}
135    [1].b = get8(), // expected-warning{{subobject initialization overrides initialization of other fields within its enclosing subobject}}
136    [0].b = 8
137  };
138}
139
140// FIXME: How do we test that this initializes the long properly?
141union { char c; long l; } u1 = { .l = 0xFFFF };
142
143extern float global_float;
144
145struct XX { int a, *b; };
146struct XY { int before; struct XX xx, *xp; float* after; } xy[] = {
147  0, 0, &xy[0].xx.a, &xy[0].xx, &global_float,
148  [1].xx = 0, &xy[1].xx.a, &xy[1].xx, &global_float,
149  0, // expected-note{{previous initialization is here}}
150  0, // expected-note{{previous initialization is here}}
151  [2].before = 0, // expected-warning{{initializer overrides prior initialization of this subobject}}
152  0, // expected-warning{{initializer overrides prior initialization of this subobject}}
153  &xy[2].xx.a, &xy[2].xx, &global_float
154};
155