1 // RUN: %clang_cc1 -std=gnu99 -fsyntax-only -pedantic -verify %s 2 // RUN: %clang_cc1 -std=gnu99 -fsyntax-only -Wgnu -Wc11-extensions -verify %s 3 // REQUIRES: LP64 4 5 extern int foof() = 1; // expected-error{{illegal initializer (only variables can be initialized)}} 6 7 static int x, y, z; 8 9 static int ary[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}} 10 int ary2[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}} 11 12 extern int fileScopeExtern[3] = { 1, 3, 5 }; // expected-warning{{'extern' variable has an initializer}} 13 14 static long ary3[] = { 1, "abc", 3, 4 }; // expected-warning{{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [4]'}} 15 16 void func() { 17 int x = 1; 18 19 typedef int TInt = 1; // expected-error{{illegal initializer (only variables can be initialized)}} 20 21 int xComputeSize[] = { 1, 3, 5 }; 22 23 int x3[x] = { 1, 2 }; // expected-error{{variable-sized object may not be initialized}} 24 25 int x4 = { 1, 2 }; // expected-warning{{excess elements in scalar initializer}} 26 27 int y[4][3] = { 28 { 1, 3, 5 }, 29 { 2, 4, 6 }, 30 { 3, 5, 7 }, 31 }; 32 33 int y2[4][3] = { 34 1, 3, 5, 2, 4, 6, 3, 5, 7 35 }; 36 37 int y3[4][3] = { 38 { 1, 3, 5 }, 39 { 2, 4, 6 }, 40 { 3, 5, 7 }, 41 { 4, 6, 8 }, 42 { 5 }, // expected-warning{{excess elements in array initializer}} 43 }; 44 45 struct threeElements { 46 int a,b,c; 47 } z = { 1 }; 48 49 struct threeElements *p = 7; // expected-warning{{incompatible integer to pointer conversion initializing 'struct threeElements *' with an expression of type 'int'}} 50 51 extern int blockScopeExtern[3] = { 1, 3, 5 }; // expected-error{{'extern' variable cannot have an initializer}} 52 53 static long x2[3] = { 1.0, 54 "abc", // expected-warning{{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [4]'}} 55 5.8 }; // expected-warning {{implicit conversion from 'double' to 'long' changes value from 5.8 to 5}} 56 } 57 58 void test() { 59 int y1[3] = { 60 { 1, 2, 3 } // expected-warning{{excess elements in scalar initializer}} 61 }; 62 int y3[4][3] = { 63 { 1, 3, 5 }, 64 { 2, 4, 6 }, 65 { 3, 5, 7 }, 66 { 4, 6, 8 }, 67 { }, // expected-warning{{use of GNU empty initializer extension}} expected-warning{{excess elements in array initializer}} 68 }; 69 int y4[4][3] = { 70 { 1, 3, 5, 2 }, // expected-warning{{excess elements in array initializer}} 71 { 4, 6 }, 72 { 3, 5, 7 }, 73 { 4, 6, 8 }, 74 }; 75 } 76 77 void allLegalAndSynonymous() { 78 short q[4][3][2] = { 79 { 1 }, 80 { 2, 3 }, 81 { 4, 5, 6 } 82 }; 83 short q2[4][3][2] = { 84 { 1, 0, 0, 0, 0, 0 }, 85 { 2, 3, 0, 0, 0, 0 }, 86 { 4, 5, 6 } 87 }; 88 short q3[4][3][2] = { 89 { 90 { 1 }, 91 }, 92 { 93 { 2, 3 }, 94 }, 95 { 96 { 4, 5 }, 97 { 6 }, 98 }, 99 }; 100 } 101 102 void legal() { 103 short q[][3][2] = { 104 { 1 }, 105 { 2, 3 }, 106 { 4, 5, 6 } 107 }; 108 int q_sizecheck[(sizeof(q) / sizeof(short [3][2])) == 3? 1 : -1]; 109 } 110 111 unsigned char asso_values[] = { 34 }; 112 int legal2() { 113 return asso_values[0]; 114 } 115 116 void illegal() { 117 short q2[4][][2] = { // expected-error{{array has incomplete element type 'short [][2]'}} 118 { 1, 0, 0, 0, 0, 0 }, 119 { 2, 3, 0, 0, 0, 0 }, 120 { 4, 5, 6 } 121 }; 122 short q3[4][3][] = { // expected-error{{array has incomplete element type 'short []'}} 123 { 124 { 1 }, 125 }, 126 { 127 { 2, 3 }, 128 }, 129 { 130 { 4, 5 }, 131 { 6 }, 132 }, 133 }; 134 int a[][] = { 1, 2 }; // expected-error{{array has incomplete element type 'int []'}} 135 } 136 137 typedef int AryT[]; 138 139 void testTypedef() 140 { 141 AryT a = { 1, 2 }, b = { 3, 4, 5 }; 142 int a_sizecheck[(sizeof(a) / sizeof(int)) == 2? 1 : -1]; 143 int b_sizecheck[(sizeof(b) / sizeof(int)) == 3? 1 : -1]; 144 } 145 146 static char const xx[] = "test"; 147 int xx_sizecheck[(sizeof(xx) / sizeof(char)) == 5? 1 : -1]; 148 static char const yy[5] = "test"; 149 static char const zz[3] = "test"; // expected-warning{{initializer-string for char array is too long}} 150 151 void charArrays() { 152 static char const test[] = "test"; 153 int test_sizecheck[(sizeof(test) / sizeof(char)) == 5? 1 : -1]; 154 static char const test2[] = { "weird stuff" }; 155 static char const test3[] = { "test", "excess stuff" }; // expected-warning{{excess elements in char array initializer}} 156 157 char* cp[] = { "Hello" }; 158 159 char c[] = { "Hello" }; 160 int l[sizeof(c) == 6 ? 1 : -1]; 161 162 int i[] = { "Hello "}; // expected-warning{{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [7]'}} 163 char c2[] = { "Hello", "Good bye" }; //expected-warning{{excess elements in char array initializer}} 164 165 int i2[1] = { "Hello" }; //expected-warning{{incompatible pointer to integer conversion initializing 'int' with an expression of type 'char [6]'}} 166 char c3[5] = { "Hello" }; 167 char c4[4] = { "Hello" }; //expected-warning{{initializer-string for char array is too long}} 168 169 int i3[] = {}; //expected-warning{{zero size arrays are an extension}} expected-warning{{use of GNU empty initializer extension}} 170 } 171 172 void variableArrayInit() { 173 int a = 4; 174 char strlit[a] = "foo"; //expected-error{{variable-sized object may not be initialized}} 175 int b[a] = { 1, 2, 4 }; //expected-error{{variable-sized object may not be initialized}} 176 } 177 178 // Pure array tests 179 float r1[10] = {{7}}; //expected-warning{{braces around scalar initializer}} 180 float r2[] = {{8}}; //expected-warning{{braces around scalar initializer}} 181 char r3[][5] = {1,2,3,4,5,6}; 182 int r3_sizecheck[(sizeof(r3) / sizeof(char[5])) == 2? 1 : -1]; 183 char r3_2[sizeof r3 == 10 ? 1 : -1]; 184 float r4[1][2] = {1,{2},3,4}; //expected-warning{{braces around scalar initializer}} expected-warning{{excess elements in array initializer}} 185 char r5[][5] = {"aa", "bbb", "ccccc"}; 186 char r6[sizeof r5 == 15 ? 1 : -1]; 187 const char r7[] = "zxcv"; 188 char r8[5] = "5char"; 189 char r9[5] = "6chars"; //expected-warning{{initializer-string for char array is too long}} 190 unsigned char r10[] = __extension__ (_Generic(0, int: (__extension__ "foo" ))); 191 int r11[0] = {}; //expected-warning{{zero size arrays are an extension}} expected-warning{{use of GNU empty initializer extension}} 192 193 // Some struct tests 194 void autoStructTest() { 195 struct s1 {char a; char b;} t1; 196 struct s2 {struct s1 c;} t2 = { t1 }; 197 // The following is a less than great diagnostic (though it's on par with EDG). 198 struct s1 t3[] = {t1, t1, "abc", 0}; //expected-warning{{incompatible pointer to integer conversion initializing 'char' with an expression of type 'char [4]'}} 199 int t4[sizeof t3 == 6 ? 1 : -1]; 200 } 201 struct foo { int z; } w; 202 int bar (void) { 203 struct foo z = { w }; //expected-error{{initializing 'int' with an expression of incompatible type 'struct foo'}} 204 return z.z; 205 } 206 struct s3 {void (*a)(void);} t5 = {autoStructTest}; 207 struct {int a; int b[];} t6 = {1, {1, 2, 3}}; // expected-warning{{flexible array initialization is a GNU extension}} \ 208 // expected-note{{initialized flexible array member 'b' is here}} 209 union {char a; int b;} t7[] = {1, 2, 3}; 210 int t8[sizeof t7 == (3*sizeof(int)) ? 1 : -1]; 211 212 struct bittest{int : 31, a, :21, :12, b;}; 213 struct bittest bittestvar = {1, 2, 3, 4}; //expected-warning{{excess elements in struct initializer}} 214 215 // Not completely sure what should happen here... 216 int u1 = {}; //expected-warning{{use of GNU empty initializer extension}} expected-error{{scalar initializer cannot be empty}} 217 int u2 = {{3}}; //expected-warning{{too many braces around scalar initializer}} 218 219 // PR2362 220 void varArray() { 221 int c[][x] = { 0 }; //expected-error{{variable-sized object may not be initialized}} 222 } 223 224 // PR2151 225 void emptyInit() {struct {} x[] = {6};} //expected-warning{{empty struct is a GNU extension}} \ 226 // expected-error{{initializer for aggregate with no elements}} 227 228 void noNamedInit() { 229 struct {int:5;} x[] = {6}; //expected-error{{initializer for aggregate with no elements}} \ 230 // expected-warning {{struct without named members is a GNU extension}} 231 } 232 struct {int a; int:5;} noNamedImplicit[] = {1,2,3}; 233 int noNamedImplicitCheck[sizeof(noNamedImplicit) == 3 * sizeof(*noNamedImplicit) ? 1 : -1]; 234 235 236 // ptrs are constant 237 struct soft_segment_descriptor { 238 long ssd_base; 239 }; 240 static int dblfault_tss; 241 242 union uniao { int ola; } xpto[1]; 243 244 struct soft_segment_descriptor gdt_segs[] = { 245 {(long) &dblfault_tss}, 246 { (long)xpto}, 247 }; 248 249 static void sppp_ipv6cp_up(); 250 const struct {} ipcp = { sppp_ipv6cp_up }; //expected-warning{{empty struct is a GNU extension}} \ 251 // expected-warning{{excess elements in struct initializer}} 252 253 struct _Matrix { union { float m[4][4]; }; }; //expected-warning{{anonymous unions are a C11 extension}} 254 typedef struct _Matrix Matrix; 255 void test_matrix() { 256 const Matrix mat1 = { 257 { { 1.0f, 2.0f, 3.0f, 4.0f, 258 5.0f, 6.0f, 7.0f, 8.0f, 259 9.0f, 10.0f, 11.0f, 12.0f, 260 13.0f, 14.0f, 15.0f, 16.0f } } 261 }; 262 263 const Matrix mat2 = { 264 1.0f, 2.0f, 3.0f, 4.0f, 265 5.0f, 6.0f, 7.0f, 8.0f, 266 9.0f, 10.0f, 11.0f, 12.0f, 267 13.0f, 14.0f, 15.0f, 16.0f 268 }; 269 } 270 271 char badchararray[1] = { badchararray[0], "asdf" }; // expected-warning {{excess elements in array initializer}} expected-error {{initializer element is not a compile-time constant}} 272 273 // Test the GNU extension for initializing an array from an array 274 // compound literal. PR9261. 275 typedef int int5[5]; 276 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}} 277 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}} 278 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}} 279 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}} 280 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}} 281 282 int a6[5] = (int[]){1, 2, 3}; // expected-error{{cannot initialize array of type 'int [5]' with array of type 'int [3]'}} 283 284 int nonconst_value(); 285 int a7[5] = (int[5]){ 1, 286 2, 287 3, 288 4, 289 nonconst_value() // expected-error{{initializer element is not a compile-time constant}} 290 }; 291 292 // <rdar://problem/10636946> 293 __attribute__((weak)) const unsigned int test10_bound = 10; 294 char test10_global[test10_bound]; // expected-error {{variable length array declaration not allowed at file scope}} 295 void test10() { 296 char test10_local[test10_bound] = "help"; // expected-error {{variable-sized object may not be initialized}} 297 } 298
