1 // RUN: %clang_cc1 -fsyntax-only -verify %s -fblocks 2 void donotwarn(); 3 4 int (^IFP) (); 5 int (^II) (int); 6 int test1() { 7 int (^PFR) (int) = 0; // OK 8 PFR = II; // OK 9 10 if (PFR == II) // OK 11 donotwarn(); 12 13 if (PFR == IFP) // OK 14 donotwarn(); 15 16 if (PFR == (int (^) (int))IFP) // OK 17 donotwarn(); 18 19 if (PFR == 0) // OK 20 donotwarn(); 21 22 if (PFR) // OK 23 donotwarn(); 24 25 if (!PFR) // OK 26 donotwarn(); 27 28 return PFR != IFP; // OK 29 } 30 31 int test2(double (^S)()) { 32 double (^I)(int) = (void*) S; 33 (void*)I = (void *)S; // expected-error {{assignment to cast is illegal, lvalue casts are not supported}} 34 35 void *pv = I; 36 37 pv = S; 38 39 I(1); 40 41 return (void*)I == (void *)S; 42 } 43 44 int^ x; // expected-error {{block pointer to non-function type is invalid}} 45 int^^ x1; // expected-error {{block pointer to non-function type is invalid}} expected-error {{block pointer to non-function type is invalid}} 46 47 void test3() { 48 char *^ y; // expected-error {{block pointer to non-function type is invalid}} 49 } 50 51 52 53 enum {NSBIRLazilyAllocated = 0}; 54 55 int test4(int argc) { // rdar://6251437 56 ^{ 57 switch (argc) { 58 case NSBIRLazilyAllocated: // is an integer constant expression. 59 default: 60 break; 61 } 62 }(); 63 return 0; 64 } 65 66 67 void bar(void*); 68 // rdar://6257721 - reference to static/global is byref by default. 69 static int test5g; 70 void test5() { 71 bar(^{ test5g = 1; }); 72 } 73 74 // rdar://6405429 - __func__ in a block refers to the containing function name. 75 const char*test6() { 76 return ^{ 77 return __func__; 78 } (); 79 } 80 81 // radr://6732116 - block comparisons 82 void (^test7a)(); 83 int test7(void (^p)()) { 84 return test7a == p; 85 } 86 87 88 void test8() { 89 somelabel: 90 ^{ goto somelabel; }(); // expected-error {{use of undeclared label 'somelabel'}} 91 } 92 93 void test9() { 94 goto somelabel; // expected-error {{use of undeclared label 'somelabel'}} 95 ^{ somelabel: ; }(); 96 } 97 98 void test10(int i) { 99 switch (i) { 100 case 41: ; 101 ^{ case 42: ; }(); // expected-error {{'case' statement not in switch statement}} 102 } 103 } 104 105 void test11(int i) { 106 switch (i) { 107 case 41: ; 108 ^{ break; }(); // expected-error {{'break' statement not in loop or switch statement}} 109 } 110 111 for (; i < 100; ++i) 112 ^{ break; }(); // expected-error {{'break' statement not in loop or switch statement}} 113 } 114 115 void (^test12f)(void); 116 void test12() { 117 test12f = ^test12f; // expected-error {{type name requires a specifier or qualifier}} expected-error {{expected expression}} 118 } 119 120 // rdar://6808730 121 void *test13 = ^{ 122 int X = 32; 123 124 void *P = ^{ 125 return X+4; // References outer block's "X", so outer block is constant. 126 }; 127 }; 128 129 void test14() { 130 int X = 32; 131 static void *P = ^{ // expected-error {{initializer element is not a compile-time constant}} 132 133 void *Q = ^{ 134 // References test14's "X": outer block is non constant. 135 return X+4; 136 }; 137 }; 138 } 139 140 enum { LESS }; 141 142 void foo(long (^comp)()) { // expected-note{{passing argument to parameter 'comp' here}} 143 } 144 145 void (^test15f)(void); 146 void test15() { 147 foo(^{ return LESS; }); // expected-error {{incompatible block pointer types passing 'int (^)(void)' to parameter of type 'long (^)()'}} 148 } 149 150 __block int test16i; // expected-error {{__block attribute not allowed, only allowed on local variables}} 151 152 void test16(__block int i) { // expected-error {{__block attribute not allowed, only allowed on local variables}} 153 int size = 5; 154 extern __block double extern_var; // expected-error {{__block attribute not allowed, only allowed on local variables}} 155 static __block char * pch; // expected-error {{__block attribute not allowed, only allowed on local variables}} 156 __block int a[size]; // expected-error {{__block attribute not allowed on declaration with a variably modified type}} 157 __block int (*ap)[size]; // expected-error {{__block attribute not allowed on declaration with a variably modified type}} 158 } 159 160 void f(); 161 162 void test17() { 163 void (^bp)(int); 164 void (*rp)(int); 165 void (^bp1)(); 166 void *vp = bp; 167 168 f(1 ? bp : vp); 169 f(1 ? vp : bp); 170 f(1 ? bp : bp1); 171 (void)(bp > rp); // expected-error {{invalid operands}} 172 (void)(bp > 0); // expected-error {{invalid operands}} 173 (void)(bp > bp); // expected-error {{invalid operands}} 174 (void)(bp > vp); // expected-error {{invalid operands}} 175 f(1 ? bp : rp); // expected-error {{incompatible operand types ('void (^)(int)' and 'void (*)(int)')}} 176 (void)(bp == 1); // expected-error {{invalid operands to binary expression}} 177 (void)(bp == 0); 178 (void)(1 == bp); // expected-error {{invalid operands to binary expression}} 179 (void)(0 == bp); 180 (void)(bp < 1); // expected-error {{invalid operands to binary expression}} 181 (void)(bp < 0); // expected-error {{invalid operands to binary expression}} 182 (void)(1 < bp); // expected-error {{invalid operands to binary expression}} 183 (void)(0 < bp); // expected-error {{invalid operands to binary expression}} 184 } 185 186 void test18() { 187 void (^const blockA)(void) = ^{ }; 188 blockA = ^{ }; // expected-error {{read-only variable is not assignable}} 189 } 190 191 // rdar://7072507 192 int test19() { 193 goto L0; // expected-error {{goto into protected scope}} 194 195 __block int x; // expected-note {{jump bypasses setup of __block variable}} 196 L0: 197 x = 0; 198 ^(){ ++x; }(); 199 return x; 200 } 201 202 // radr://7438948 203 void test20() { 204 int n = 7; 205 int vla[n]; // expected-note {{declared here}} 206 int (*vm)[n] = 0; // expected-note {{declared here}} 207 vla[1] = 4341; 208 ^{ 209 (void)vla[1]; // expected-error {{cannot refer to declaration with a variably modified type inside block}} 210 (void)(vm+1); // expected-error {{cannot refer to declaration with a variably modified type inside block}} 211 }(); 212 } 213 214 // radr://7438948 215 void test21() { 216 int a[7]; // expected-note {{declared here}} 217 __block int b[10]; // expected-note {{declared here}} 218 a[1] = 1; 219 ^{ 220 (void)a[1]; // expected-error {{cannot refer to declaration with an array type inside block}} 221 (void)b[1]; // expected-error {{cannot refer to declaration with an array type inside block}} 222 }(); 223 } 224 225 // rdar ://8218839 226 const char * (^func)(void) = ^{ return __func__; }; 227 const char * (^function)(void) = ^{ return __FUNCTION__; }; 228 const char * (^pretty)(void) = ^{ return __PRETTY_FUNCTION__; }; 229
