| 1 | // RUN: %clang_cc1 -Wno-int-to-pointer-cast -pedantic -fsyntax-only %s -verify -fblocks |
| 2 | |
| 3 | typedef void (^CL)(void); |
| 4 | |
| 5 | CL foo() { |
| 6 | short y; |
| 7 | short (^add1)(void) = ^{ return y+1; }; // expected-error {{incompatible block pointer types initializing 'short (^)(void)' with an expression of type 'int (^)(void)'}} |
| 8 | |
| 9 | CL X = ^{ |
| 10 | if (2) |
| 11 | return; |
| 12 | return 1; // expected-error {{return type 'int' must match previous return type 'void' when block literal has unspecified explicit return type}} |
| 13 | }; |
| 14 | |
| 15 | int (^Y) (void) = ^{ |
| 16 | if (3) |
| 17 | return 1; |
| 18 | else |
| 19 | return; // expected-error {{return type 'void' must match previous return type 'int' when block literal has unspecified explicit return type}} |
| 20 | }; |
| 21 | |
| 22 | char *(^Z)(void) = ^{ |
| 23 | if (3) |
| 24 | return ""; |
| 25 | else |
| 26 | return (char*)0; |
| 27 | }; |
| 28 | |
| 29 | double (^A)(void) = ^ { // expected-error {{incompatible block pointer types initializing 'double (^)(void)' with an expression of type 'float (^)(void)'}} |
| 30 | if (1) |
| 31 | return (float)1.0; |
| 32 | else |
| 33 | if (2) |
| 34 | return (double)2.0; // expected-error {{return type 'double' must match previous return type 'float' when block literal has unspecified explicit return type}} |
| 35 | return 1; // expected-error {{return type 'int' must match previous return type 'float' when block literal has unspecified explicit return type}} |
| 36 | }; |
| 37 | char *(^B)(void) = ^{ |
| 38 | if (3) |
| 39 | return ""; |
| 40 | else |
| 41 | return 2; // expected-error {{return type 'int' must match previous return type 'char *' when block literal has unspecified explicit return type}} |
| 42 | }; |
| 43 | |
| 44 | return ^{ return 1; }; // expected-error {{incompatible block pointer types returning 'int (^)(void)' from a function with result type 'CL' (aka 'void (^)(void)')}} |
| 45 | } |
| 46 | |
| 47 | typedef int (^CL2)(void); |
| 48 | |
| 49 | CL2 foo2() { |
| 50 | return ^{ return 1; }; |
| 51 | } |
| 52 | |
| 53 | typedef unsigned int * uintptr_t; |
| 54 | typedef char Boolean; |
| 55 | typedef int CFBasicHash; |
| 56 | |
| 57 | #define INVOKE_CALLBACK2(P, A, B) (P)(A, B) |
| 58 | |
| 59 | typedef struct { |
| 60 | Boolean (^isEqual)(const CFBasicHash *, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key); |
| 61 | } CFBasicHashCallbacks; |
| 62 | |
| 63 | int foo3() { |
| 64 | CFBasicHashCallbacks cb; |
| 65 | |
| 66 | Boolean (*value_equal)(uintptr_t, uintptr_t) = 0; |
| 67 | |
| 68 | cb.isEqual = ^(const CFBasicHash *table, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key) { |
| 69 | return (Boolean)(uintptr_t)INVOKE_CALLBACK2(value_equal, (uintptr_t)stack_value_or_key1, (uintptr_t)stack_value_or_key2); |
| 70 | }; |
| 71 | } |
| 72 | |
| 73 | static int funk(char *s) { |
| 74 | if (^{} == ((void*)0)) |
| 75 | return 1; |
| 76 | else |
| 77 | return 0; |
| 78 | } |
| 79 | void next(); |
| 80 | void foo4() { |
| 81 | int (^xx)(const char *s) = ^(char *s) { return 1; }; // expected-error {{incompatible block pointer types initializing 'int (^)(const char *)' with an expression of type 'int (^)(char *)'}} |
| 82 | int (*yy)(const char *s) = funk; // expected-warning {{incompatible pointer types initializing 'int (*)(const char *)' with an expression of type 'int (char *)'}} |
| 83 | |
| 84 | int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; }; // expected-warning{{implicitly declaring library function 'printf' with type 'int (const char *, ...)'}} \ |
| 85 | // expected-note{{include the header <stdio.h> or explicitly provide a declaration for 'printf'}} |
| 86 | } |
| 87 | |
| 88 | typedef void (^bptr)(void); |
| 89 | |
| 90 | bptr foo5(int j) { |
| 91 | __block int i; |
| 92 | if (j) |
| 93 | return ^{ ^{ i=0; }(); }; // expected-error {{returning block that lives on the local stack}} |
| 94 | return ^{ i=0; }; // expected-error {{returning block that lives on the local stack}} |
| 95 | return (^{ i=0; }); // expected-error {{returning block that lives on the local stack}} |
| 96 | return (void*)(^{ i=0; }); // expected-error {{returning block that lives on the local stack}} |
| 97 | } |
| 98 | |
| 99 | int (*funcptr3[5])(long); |
| 100 | int sz8 = sizeof(^int (*[5])(long) {return funcptr3;}); // expected-error {{block cannot return array type}} expected-warning {{incompatible pointer to integer conversion}} |
| 101 | int sz9 = sizeof(^int(*())()[3]{ }); // expected-error {{function cannot return array type}} |
| 102 | |
| 103 | void foo6() { |
| 104 | int (^b)(int) __attribute__((noreturn)); |
| 105 | b = ^ (int i) __attribute__((noreturn)) { return 1; }; // expected-error {{block declared 'noreturn' should not return}} |
| 106 | b(1); |
| 107 | int (^c)(void) __attribute__((noreturn)) = ^ __attribute__((noreturn)) { return 100; }; // expected-error {{block declared 'noreturn' should not return}} |
| 108 | } |
| 109 | |
| 110 | |
| 111 | void foo7() |
| 112 | { |
| 113 | const int (^BB) (void) = ^{ const int i = 1; return i; }; // OK - initializing 'const int (^)(void)' with an expression of type 'int (^)(void)' |
| 114 | |
| 115 | const int (^CC) (void) = ^const int{ const int i = 1; return i; }; |
| 116 | |
| 117 | |
| 118 | int i; |
| 119 | int (^FF) (void) = ^{ return i; }; // OK |
| 120 | int (^EE) (void) = ^{ return i+1; }; // OK |
| 121 | |
| 122 | __block int j; |
| 123 | int (^JJ) (void) = ^{ return j; }; // OK |
| 124 | int (^KK) (void) = ^{ return j+1; }; // OK |
| 125 | |
| 126 | __block const int k; |
| 127 | const int cint = 100; |
| 128 | |
| 129 | int (^MM) (void) = ^{ return k; }; |
| 130 | int (^NN) (void) = ^{ return cint; }; |
| 131 | } |
| 132 | |
| 133 | // rdar://11069896 |
| 134 | void (^blk)(void) = ^{ |
| 135 | return (void)0; // expected-warning {{void block literal should not return void expression}} |
| 136 | }; |
| 137 | |
| 138 | // rdar://13463504 |
| 139 | enum Test8 { T8_a, T8_b, T8_c }; |
| 140 | void test8(void) { |
| 141 | extern void test8_helper(int (^)(int)); |
| 142 | test8_helper(^(int flag) { if (flag) return T8_a; return T8_b; }); |
| 143 | } |
| 144 | void test8b(void) { |
| 145 | extern void test8_helper2(char (^)(int)); // expected-note {{here}} |
| 146 | test8_helper2(^(int flag) { if (flag) return T8_a; return T8_b; }); // expected-error {{passing 'enum Test8 (^)(int)' to parameter of type 'char (^)(int)'}} |
| 147 | } |
| 148 | |