array-init.c revision 0c706c29f20b6fa36759fa41333b9c3ec0bd2969
1// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s 2 3extern int foof() = 1; // expected-error{{illegal initializer (only variables can be initialized)}} 4 5static int x, y, z; 6 7static int ary[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}} 8int ary2[] = { x, y, z }; // expected-error{{initializer element is not a compile-time constant}} 9 10extern int fileScopeExtern[3] = { 1, 3, 5 }; // expected-warning{{'extern' variable has an initializer}} 11 12static long ary3[] = { 1, "abc", 3, 4 }; // expected-warning{{incompatible pointer to integer conversion initializing 'long' with an expression of type 'char [4]'}} 13 14void 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 54void 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 73void 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 98void 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 107unsigned char asso_values[] = { 34 }; 108int legal2() { 109 return asso_values[0]; 110} 111 112void 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 133typedef int AryT[]; 134 135void 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 142static char const xx[] = "test"; 143int xx_sizecheck[(sizeof(xx) / sizeof(char)) == 5? 1 : -1]; 144static char const yy[5] = "test"; 145static char const zz[3] = "test"; // expected-warning{{initializer-string for char array is too long}} 146 147void 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 168void variableArrayInit() { 169 int a = 4; 170 char strlit[a] = "foo"; //expected-error{{array initializer must be an initializer list or string literal}} 171 int b[a] = { 1, 2, 4 }; //expected-error{{variable-sized object may not be initialized}} 172} 173 174// Pure array tests 175float r1[10] = {{7}}; //expected-warning{{braces around scalar initializer}} 176float r2[] = {{8}}; //expected-warning{{braces around scalar initializer}} 177char r3[][5] = {1,2,3,4,5,6}; 178int r3_sizecheck[(sizeof(r3) / sizeof(char[5])) == 2? 1 : -1]; 179char r3_2[sizeof r3 == 10 ? 1 : -1]; 180float r4[1][2] = {1,{2},3,4}; //expected-warning{{braces around scalar initializer}} expected-warning{{excess elements in array initializer}} 181char r5[][5] = {"aa", "bbb", "ccccc"}; 182char r6[sizeof r5 == 15 ? 1 : -1]; 183const char r7[] = "zxcv"; 184char r8[5] = "5char"; 185char r9[5] = "6chars"; //expected-warning{{initializer-string for char array is too long}} 186 187int r11[0] = {}; //expected-warning{{zero size arrays are an extension}} expected-warning{{use of GNU empty initializer extension}} 188 189// Some struct tests 190void autoStructTest() { 191struct s1 {char a; char b;} t1; 192struct s2 {struct s1 c;} t2 = { t1 }; 193// The following is a less than great diagnostic (though it's on par with EDG). 194struct s1 t3[] = {t1, t1, "abc", 0}; //expected-warning{{incompatible pointer to integer conversion initializing 'char' with an expression of type 'char [4]'}} 195int t4[sizeof t3 == 6 ? 1 : -1]; 196} 197struct foo { int z; } w; 198int bar (void) { 199 struct foo z = { w }; //expected-error{{initializing 'int' with an expression of incompatible type 'struct foo'}} 200 return z.z; 201} 202struct s3 {void (*a)(void);} t5 = {autoStructTest}; 203struct {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}} 205union {char a; int b;} t7[] = {1, 2, 3}; 206int t8[sizeof t7 == (3*sizeof(int)) ? 1 : -1]; 207 208struct bittest{int : 31, a, :21, :12, b;}; 209struct bittest bittestvar = {1, 2, 3, 4}; //expected-warning{{excess elements in struct initializer}} 210 211// Not completely sure what should happen here... 212int u1 = {}; //expected-warning{{use of GNU empty initializer extension}} expected-error{{scalar initializer cannot be empty}} 213int u2 = {{3}}; //expected-warning{{too many braces around scalar initializer}} 214 215// PR2362 216void varArray() { 217 int c[][x] = { 0 }; //expected-error{{variable-sized object may not be initialized}} 218} 219 220// PR2151 221void emptyInit() {struct {} x[] = {6};} //expected-warning{{empty struct (accepted as an extension) has size 0 in C, size 1 in C++}} \ 222// expected-error{{initializer for aggregate with no elements}} 223 224void noNamedInit() { 225 struct {int:5;} x[] = {6}; //expected-error{{initializer for aggregate with no elements}} 226} 227struct {int a; int:5;} noNamedImplicit[] = {1,2,3}; 228int noNamedImplicitCheck[sizeof(noNamedImplicit) == 3 * sizeof(*noNamedImplicit) ? 1 : -1]; 229 230 231// ptrs are constant 232struct soft_segment_descriptor { 233 long ssd_base; 234}; 235static int dblfault_tss; 236 237union uniao { int ola; } xpto[1]; 238 239struct soft_segment_descriptor gdt_segs[] = { 240 {(long) &dblfault_tss}, 241 { (long)xpto}, 242}; 243 244static void sppp_ipv6cp_up(); 245const struct {} ipcp = { sppp_ipv6cp_up }; //expected-warning{{empty struct (accepted as an extension) has size 0 in C, size 1 in C++}} \ 246// expected-warning{{excess elements in struct initializer}} 247 248struct _Matrix { union { float m[4][4]; }; }; //expected-warning{{anonymous unions are a GNU extension in C}} 249typedef struct _Matrix Matrix; 250void 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 266char 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. 270typedef int int5[5]; 271int 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}} 272int 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}} 273int 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}} 274int 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}} 275int 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 277int a6[5] = (int[]){1, 2, 3}; // expected-error{{cannot initialize array of type 'int [5]' with array of type 'int [3]'}} 278 279int nonconst_value(); 280int a7[5] = (int[5]){ 1, 2, 3, 4, nonconst_value() }; // expected-error{{initializer element is not a compile-time constant}} 281