| 1 | // RUN: %clang_cc1 -fsyntax-only -verify -fblocks -Wno-objc-root-class %s |
| 2 | // test for block type safety. |
| 3 | |
| 4 | @interface Super @end |
| 5 | @interface Sub : Super @end |
| 6 | |
| 7 | void f2(void(^f)(Super *)) { // expected-note{{passing argument to parameter 'f' here}} |
| 8 | Super *o; |
| 9 | f(o); |
| 10 | } |
| 11 | |
| 12 | void f3(void(^f)(Sub *)) { |
| 13 | Sub *o; |
| 14 | f(o); |
| 15 | } |
| 16 | |
| 17 | void r0(Super* (^f)()) { |
| 18 | Super *o = f(); |
| 19 | } |
| 20 | |
| 21 | void r1(Sub* (^f)()) { // expected-note{{passing argument to parameter 'f' here}} |
| 22 | Sub *o = f(); |
| 23 | } |
| 24 | |
| 25 | @protocol NSObject; |
| 26 | @class NSObject; |
| 27 | |
| 28 | void r2 (id<NSObject> (^f) (void)) { |
| 29 | id o = f(); |
| 30 | } |
| 31 | |
| 32 | void test1() { |
| 33 | f2(^(Sub *o) { }); // expected-error {{incompatible block pointer types passing}} |
| 34 | f3(^(Super *o) { }); // OK, block taking Super* may be called with a Sub* |
| 35 | |
| 36 | r0(^Super* () { return 0; }); // OK |
| 37 | r0(^Sub* () { return 0; }); // OK, variable of type Super* gets return value of type Sub* |
| 38 | r0(^id () { return 0; }); |
| 39 | |
| 40 | r1(^Super* () { return 0; }); // expected-error {{incompatible block pointer types passing}} |
| 41 | r1(^Sub* () { return 0; }); // OK |
| 42 | r1(^id () { return 0; }); |
| 43 | |
| 44 | r2(^id<NSObject>() { return 0; }); |
| 45 | } |
| 46 | |
| 47 | |
| 48 | @interface A @end |
| 49 | @interface B @end |
| 50 | |
| 51 | void f0(void (^f)(A* x)) { |
| 52 | A* a; |
| 53 | f(a); |
| 54 | } |
| 55 | |
| 56 | void f1(void (^f)(id x)) { |
| 57 | B *b; |
| 58 | f(b); |
| 59 | } |
| 60 | |
| 61 | void test2(void) |
| 62 | { |
| 63 | f0(^(id a) { }); // OK |
| 64 | f1(^(A* a) { }); |
| 65 | f1(^(id<NSObject> a) { }); // OK |
| 66 | } |
| 67 | |
| 68 | @interface NSArray |
| 69 | // Calls block() with every object in the array |
| 70 | -enumerateObjectsWithBlock:(void (^)(id obj))block; |
| 71 | @end |
| 72 | |
| 73 | @interface MyThing |
| 74 | -(void) printThing; |
| 75 | @end |
| 76 | |
| 77 | @implementation MyThing |
| 78 | static NSArray* myThings; // array of MyThing* |
| 79 | |
| 80 | -(void) printThing { } |
| 81 | |
| 82 | // programmer wants to write this: |
| 83 | -printMyThings1 { |
| 84 | [myThings enumerateObjectsWithBlock: ^(MyThing *obj) { |
| 85 | [obj printThing]; |
| 86 | }]; |
| 87 | } |
| 88 | |
| 89 | // strict type safety requires this: |
| 90 | -printMyThings { |
| 91 | [myThings enumerateObjectsWithBlock: ^(id obj) { |
| 92 | MyThing *obj2 = (MyThing *)obj; |
| 93 | [obj2 printThing]; |
| 94 | }]; |
| 95 | } |
| 96 | @end |
| 97 | |
| 98 | @protocol P, P2; |
| 99 | void f4(void (^f)(id<P> x)) { // expected-note{{passing argument to parameter 'f' here}} |
| 100 | NSArray<P2> *b; |
| 101 | f(b); // expected-warning {{passing 'NSArray<P2> *' to parameter of incompatible type 'id<P>'}} |
| 102 | } |
| 103 | |
| 104 | void test3() { |
| 105 | f4(^(NSArray<P2>* a) { }); // expected-error {{incompatible block pointer types passing 'void (^)(NSArray<P2> *)' to parameter of type 'void (^)(id<P>)'}} |
| 106 | } |
| 107 | |
| 108 | // rdar : //8302845 |
| 109 | @protocol Foo @end |
| 110 | |
| 111 | @interface Baz @end |
| 112 | |
| 113 | @interface Baz(FooConformance) <Foo> |
| 114 | @end |
| 115 | |
| 116 | @implementation Baz @end |
| 117 | |
| 118 | int test4 () { |
| 119 | id <Foo> (^b)() = ^{ // Doesn't work |
| 120 | return (Baz *)0; |
| 121 | }; |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | // rdar:// 9118343 |
| 126 | |
| 127 | @protocol NSCopying @end |
| 128 | |
| 129 | @interface NSAllArray <NSCopying> |
| 130 | @end |
| 131 | |
| 132 | @interface NSAllArray (FooConformance) <Foo> |
| 133 | @end |
| 134 | |
| 135 | int test5() { |
| 136 | NSAllArray *(^block)(id); |
| 137 | id <Foo> (^genericBlock)(id); |
| 138 | genericBlock = block; |
| 139 | return 0; |
| 140 | } |
| 141 | |
| 142 | // rdar://10798770 |
| 143 | typedef int NSInteger; |
| 144 | |
| 145 | typedef enum : NSInteger {NSOrderedAscending = -1L, NSOrderedSame, NSOrderedDescending} NSComparisonResult; |
| 146 | |
| 147 | typedef NSComparisonResult (^NSComparator)(id obj1, id obj2); |
| 148 | |
| 149 | @interface radar10798770 |
| 150 | - (void)sortUsingComparator:(NSComparator)c; |
| 151 | @end |
| 152 | |
| 153 | void f() { |
| 154 | radar10798770 *f; |
| 155 | [f sortUsingComparator:^(id a, id b) { |
| 156 | return NSOrderedSame; |
| 157 | }]; |
| 158 | } |
| 159 | |
| 160 | // rdar://16739120 |
| 161 | @protocol P1 @end |
| 162 | @protocol P2 @end |
| 163 | |
| 164 | void Test() { |
| 165 | void (^aBlock)(); |
| 166 | id anId = aBlock; // OK |
| 167 | |
| 168 | id<P1,P2> anQualId = aBlock; // expected-error {{initializing 'id<P1,P2>' with an expression of incompatible type 'void (^)()'}} |
| 169 | |
| 170 | NSArray* anArray = aBlock; // expected-error {{initializing 'NSArray *' with an expression of incompatible type 'void (^)()'}} |
| 171 | |
| 172 | aBlock = anId; // OK |
| 173 | |
| 174 | id<P1,P2> anQualId1; |
| 175 | aBlock = anQualId1; // expected-error {{assigning to 'void (^)()' from incompatible type 'id<P1,P2>'}} |
| 176 | |
| 177 | NSArray* anArray1; |
| 178 | aBlock = anArray1; // expected-error {{assigning to 'void (^)()' from incompatible type 'NSArray *'}} |
| 179 | } |
| 180 | |
| 181 | void Test2() { |
| 182 | void (^aBlock)(); |
| 183 | id<NSObject> anQualId1 = aBlock; // Ok |
| 184 | id<NSObject, NSCopying> anQualId2 = aBlock; // Ok |
| 185 | id<NSObject, NSCopying, NSObject, NSCopying> anQualId3 = aBlock; // Ok |
| 186 | id <P1> anQualId4 = aBlock; // expected-error {{initializing 'id<P1>' with an expression of incompatible type 'void (^)()'}} |
| 187 | id<NSObject, P1, NSCopying> anQualId5 = aBlock; // expected-error {{initializing 'id<NSObject,P1,NSCopying>' with an expression of incompatible type 'void (^)()'}} |
| 188 | id<NSCopying> anQualId6 = aBlock; // Ok |
| 189 | } |
| 190 | |
| 191 | void Test3() { |
| 192 | void (^aBlock)(); |
| 193 | NSObject *NSO = aBlock; // Ok |
| 194 | NSObject<NSObject> *NSO1 = aBlock; // Ok |
| 195 | NSObject<NSObject, NSCopying> *NSO2 = aBlock; // Ok |
| 196 | NSObject<NSObject, NSCopying, NSObject, NSCopying> *NSO3 = aBlock; // Ok |
| 197 | NSObject <P1> *NSO4 = aBlock; // expected-error {{initializing 'NSObject<P1> *' with an expression of incompatible type 'void (^)()'}} |
| 198 | NSObject<NSObject, P1, NSCopying> *NSO5 = aBlock; // expected-error {{initializing 'NSObject<NSObject,P1,NSCopying> *' with an expression of incompatible type 'void (^)()'}} |
| 199 | NSObject<NSCopying> *NSO6 = aBlock; // Ok |
| 200 | } |
| 201 | |
| 202 | // rdar://problem/19420731 |
| 203 | typedef NSObject<P1> NSObject_P1; |
| 204 | typedef NSObject_P1<P2> NSObject_P1_P2; |
| 205 | |
| 206 | void Test4(void (^handler)(NSObject_P1_P2 *p)) { |
| 207 | Test4(^(NSObject<P2> *p) { }); |
| 208 | } |
| 209 | |