1 // RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
2 
3 extern int foof() = 1; // expected-error{{illegal initializer (only variables can be initialized)}}
4 
5 static int x, y, z;
6 
7 static int ary[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}}
8 int ary2[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}}
9 
10 extern int fileScopeExtern[3] = { 1, 3, 5 }; // expected-warning{{'extern' variable has an initializer}}
11 
12 static long ary3[] = { 1, "abc", 3, 4 }; // expected-warning{{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [4]'}}
13 
14 void func() {
15   int x = 1;
16 
17   typedef int TInt = 1; // expected-error{{illegal initializer (only variables can be initialized)}}
18 
19   int xComputeSize[] = { 1, 3, 5 };
20 
21   int x3[x] = { 1, 2 }; // expected-error{{variable-sized object may not be initialized}}
22 
23   int x4 = { 1, 2 }; // expected-warning{{excess elements in scalar initializer}}
24 
25   int y[4][3] = {
26     { 1, 3, 5 },
27     { 2, 4, 6 },
28     { 3, 5, 7 },
29   };
30 
31   int y2[4][3] = {
32     1, 3, 5, 2, 4, 6, 3, 5, 7
33   };
34 
35   int y3[4][3] = {
36     { 1, 3, 5 },
37     { 2, 4, 6 },
38     { 3, 5, 7 },
39     { 4, 6, 8 },
40     { 5 }, // expected-warning{{excess elements in array initializer}}
41   };
42 
43   struct threeElements {
44     int a,b,c;
45   } z = { 1 };
46 
47   struct threeElements *p = 7; // expected-warning{{incompatible integer to pointer conversion initializing 'struct threeElements *' with an expression of type 'int'}}
48 
49   extern int blockScopeExtern[3] = { 1, 3, 5 }; // expected-error{{'extern' variable cannot have an initializer}}
50 
51   static long x2[3] = { 1.0, "abc" , 5.8 }; // expected-warning{{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [4]'}}
52 }
53 
54 void test() {
55   int y1[3] = {
56     { 1, 2, 3 } // expected-warning{{excess elements in scalar initializer}}
57   };
58   int y3[4][3] = {
59     { 1, 3, 5 },
60     { 2, 4, 6 },
61     { 3, 5, 7 },
62     { 4, 6, 8 },
63     {  }, // expected-warning{{use of GNU empty initializer extension}} expected-warning{{excess elements in array initializer}}
64   };
65   int y4[4][3] = {
66     { 1, 3, 5, 2 }, // expected-warning{{excess elements in array initializer}}
67     { 4, 6 },
68     { 3, 5, 7 },
69     { 4, 6, 8 },
70   };
71 }
72 
73 void allLegalAndSynonymous() {
74   short q[4][3][2] = {
75     { 1 },
76     { 2, 3 },
77     { 4, 5, 6 }
78   };
79   short q2[4][3][2] = {
80     { 1, 0, 0, 0, 0, 0 },
81     { 2, 3, 0, 0, 0, 0 },
82     { 4, 5, 6 }
83   };
84   short q3[4][3][2] = {
85     {
86       { 1 },
87     },
88     {
89       { 2, 3 },
90     },
91     {
92       { 4, 5 },
93       { 6 },
94     },
95   };
96 }
97 
98 void legal() {
99   short q[][3][2] = {
100     { 1 },
101     { 2, 3 },
102     { 4, 5, 6 }
103   };
104   int q_sizecheck[(sizeof(q) / sizeof(short [3][2])) == 3? 1 : -1];
105 }
106 
107 unsigned char asso_values[] = { 34 };
108 int legal2() {
109   return asso_values[0];
110 }
111 
112 void illegal() {
113   short q2[4][][2] = { // expected-error{{array has incomplete element type 'short [][2]'}}
114     { 1, 0, 0, 0, 0, 0 },
115     { 2, 3, 0, 0, 0, 0 },
116     { 4, 5, 6 }
117   };
118   short q3[4][3][] = { // expected-error{{array has incomplete element type 'short []'}}
119     {
120       { 1 },
121     },
122     {
123       { 2, 3 },
124     },
125     {
126       { 4, 5 },
127       { 6 },
128     },
129   };
130   int a[][] = { 1, 2 }; // expected-error{{array has incomplete element type 'int []'}}
131 }
132 
133 typedef int AryT[];
134 
135 void testTypedef()
136 {
137   AryT a = { 1, 2 }, b = { 3, 4, 5 };
138   int a_sizecheck[(sizeof(a) / sizeof(int)) == 2? 1 : -1];
139   int b_sizecheck[(sizeof(b) / sizeof(int)) == 3? 1 : -1];
140 }
141 
142 static char const xx[] = "test";
143 int xx_sizecheck[(sizeof(xx) / sizeof(char)) == 5? 1 : -1];
144 static char const yy[5] = "test";
145 static char const zz[3] = "test"; // expected-warning{{initializer-string for char array is too long}}
146 
147 void charArrays() {
148   static char const test[] = "test";
149   int test_sizecheck[(sizeof(test) / sizeof(char)) == 5? 1 : -1];
150   static char const test2[] = { "weird stuff" };
151   static char const test3[] = { "test", "excess stuff" }; // expected-warning{{excess elements in char array initializer}}
152 
153   char* cp[] = { "Hello" };
154 
155   char c[] = { "Hello" };
156   int l[sizeof(c) == 6 ? 1 : -1];
157 
158   int i[] = { "Hello "}; // expected-warning{{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [7]'}}
159   char c2[] = { "Hello", "Good bye" }; //expected-warning{{excess elements in char array initializer}}
160 
161   int i2[1] = { "Hello" }; //expected-warning{{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [6]'}}
162   char c3[5] = { "Hello" };
163   char c4[4] = { "Hello" }; //expected-warning{{initializer-string for char array is too long}}
164 
165   int i3[] = {}; //expected-warning{{zero size arrays are an extension}} expected-warning{{use of GNU empty initializer extension}}
166 }
167 
168 void variableArrayInit() {
169   int a = 4;
170   char strlit[a] = "foo"; //expected-error{{variable-sized object may not be initialized}}
171   int b[a] = { 1, 2, 4 }; //expected-error{{variable-sized object may not be initialized}}
172 }
173 
174 // Pure array tests
175 float r1[10] = {{7}}; //expected-warning{{braces around scalar initializer}}
176 float r2[] = {{8}}; //expected-warning{{braces around scalar initializer}}
177 char r3[][5] = {1,2,3,4,5,6};
178 int r3_sizecheck[(sizeof(r3) / sizeof(char[5])) == 2? 1 : -1];
179 char r3_2[sizeof r3 == 10 ? 1 : -1];
180 float r4[1][2] = {1,{2},3,4}; //expected-warning{{braces around scalar initializer}} expected-warning{{excess elements in array initializer}}
181 char r5[][5] = {"aa", "bbb", "ccccc"};
182 char r6[sizeof r5 == 15 ? 1 : -1];
183 const char r7[] = "zxcv";
184 char r8[5] = "5char";
185 char r9[5] = "6chars"; //expected-warning{{initializer-string for char array is too long}}
186 
187 int r11[0] = {}; //expected-warning{{zero size arrays are an extension}} expected-warning{{use of GNU empty initializer extension}}
188 
189 // Some struct tests
190 void autoStructTest() {
191 struct s1 {char a; char b;} t1;
192 struct s2 {struct s1 c;} t2 = { t1 };
193 // The following is a less than great diagnostic (though it's on par with EDG).
194 struct s1 t3[] = {t1, t1, "abc", 0}; //expected-warning{{incompatible pointer to integer conversion initializing 'char' with an expression of type 'char [4]'}}
195 int t4[sizeof t3 == 6 ? 1 : -1];
196 }
197 struct foo { int z; } w;
198 int bar (void) {
199   struct foo z = { w }; //expected-error{{initializing 'int' with an expression of incompatible type 'struct foo'}}
200   return z.z;
201 }
202 struct s3 {void (*a)(void);} t5 = {autoStructTest};
203 struct {int a; int b[];} t6 = {1, {1, 2, 3}}; // expected-warning{{flexible array initialization is a GNU extension}} \
204 // expected-note{{initialized flexible array member 'b' is here}}
205 union {char a; int b;} t7[] = {1, 2, 3};
206 int t8[sizeof t7 == (3*sizeof(int)) ? 1 : -1];
207 
208 struct bittest{int : 31, a, :21, :12, b;};
209 struct bittest bittestvar = {1, 2, 3, 4}; //expected-warning{{excess elements in struct initializer}}
210 
211 // Not completely sure what should happen here...
212 int u1 = {}; //expected-warning{{use of GNU empty initializer extension}} expected-error{{scalar initializer cannot be empty}}
213 int u2 = {{3}}; //expected-warning{{too many braces around scalar initializer}}
214 
215 // PR2362
216 void varArray() {
217   int c[][x] = { 0 }; //expected-error{{variable-sized object may not be initialized}}
218 }
219 
220 // PR2151
221 void emptyInit() {struct {} x[] = {6};} //expected-warning{{empty struct is a GNU extension}} \
222 // expected-error{{initializer for aggregate with no elements}}
223 
224 void noNamedInit() {
225   struct {int:5;} x[] = {6}; //expected-error{{initializer for aggregate with no elements}}
226 }
227 struct {int a; int:5;} noNamedImplicit[] = {1,2,3};
228 int noNamedImplicitCheck[sizeof(noNamedImplicit) == 3 * sizeof(*noNamedImplicit) ? 1 : -1];
229 
230 
231 // ptrs are constant
232 struct soft_segment_descriptor {
233   long ssd_base;
234 };
235 static int dblfault_tss;
236 
237 union uniao { int ola; } xpto[1];
238 
239 struct soft_segment_descriptor gdt_segs[] = {
240   {(long) &dblfault_tss},
241   { (long)xpto},
242 };
243 
244 static void sppp_ipv6cp_up();
245 const struct {} ipcp = { sppp_ipv6cp_up }; //expected-warning{{empty struct is a GNU extension}} \
246 // expected-warning{{excess elements in struct initializer}}
247 
248 struct _Matrix { union { float m[4][4]; }; }; //expected-warning{{anonymous unions are a GNU extension in C}}
249 typedef struct _Matrix Matrix;
250 void test_matrix() {
251   const Matrix mat1 = {
252     { { 1.0f, 2.0f, 3.0f, 4.0f,
253         5.0f, 6.0f, 7.0f, 8.0f,
254         9.0f, 10.0f, 11.0f, 12.0f,
255         13.0f, 14.0f, 15.0f, 16.0f } }
256   };
257 
258   const Matrix mat2 = {
259     1.0f, 2.0f, 3.0f, 4.0f,
260     5.0f, 6.0f, 7.0f, 8.0f,
261     9.0f, 10.0f, 11.0f, 12.0f,
262     13.0f, 14.0f, 15.0f, 16.0f
263   };
264 }
265 
266 char badchararray[1] = { badchararray[0], "asdf" }; // expected-warning {{excess elements in array initializer}} expected-error {{initializer element is not a compile-time constant}}
267 
268 // Test the GNU extension for initializing an array from an array
269 // compound literal. PR9261.
270 typedef int int5[5];
271 int a1[5] = (int[]){1, 2, 3, 4, 5}; // expected-warning{{initialization of an array of type 'int [5]' from a compound literal of type 'int [5]' is a GNU extension}}
272 int a2[5] = (int[5]){1, 2, 3, 4, 5}; // expected-warning{{initialization of an array of type 'int [5]' from a compound literal of type 'int [5]' is a GNU extension}}
273 int a3[] = ((int[]){1, 2, 3, 4, 5}); // expected-warning{{initialization of an array of type 'int []' from a compound literal of type 'int [5]' is a GNU extension}}
274 int a4[] = (int[5]){1, 2, 3, 4, 5}; // expected-warning{{initialization of an array of type 'int []' from a compound literal of type 'int [5]' is a GNU extension}}
275 int a5[] = (int5){1, 2, 3, 4, 5}; // expected-warning{{initialization of an array of type 'int []' from a compound literal of type 'int5' (aka 'int [5]') is a GNU extension}}
276 
277 int a6[5] = (int[]){1, 2, 3}; // expected-error{{cannot initialize array of type 'int [5]' with array of type 'int [3]'}}
278 
279 int nonconst_value();
280 int a7[5] = (int[5]){ 1, 2, 3, 4, nonconst_value() }; // expected-error{{initializer element is not a compile-time constant}}
281 
282 // <rdar://problem/10636946>
283 __attribute__((weak)) const unsigned int test10_bound = 10;
284 char test10_global[test10_bound]; // expected-error {{variable length array declaration not allowed at file scope}}
285 void test10() {
286   char test10_local[test10_bound] = "help"; // expected-error {{variable-sized object may not be initialized}}
287 }
288