| 1 | // RUN: %clang_cc1 -fsyntax-only -verify %s |
|---|
| 2 | // rdar://8191774 |
|---|
| 3 | |
|---|
| 4 | @protocol SomeProtocol |
|---|
| 5 | @end |
|---|
| 6 | |
|---|
| 7 | @protocol SomeProtocol1 |
|---|
| 8 | @end |
|---|
| 9 | |
|---|
| 10 | @interface SomeObject <SomeProtocol> |
|---|
| 11 | @end |
|---|
| 12 | |
|---|
| 13 | int main () { |
|---|
| 14 | Class <SomeProtocol> classA; |
|---|
| 15 | Class <SomeProtocol> classB; |
|---|
| 16 | Class <SomeProtocol, SomeProtocol1> classC; |
|---|
| 17 | Class <SomeProtocol1> classD; |
|---|
| 18 | void * pv = 0; |
|---|
| 19 | Class c = (Class)0;; |
|---|
| 20 | if (pv) |
|---|
| 21 | return classA == pv; |
|---|
| 22 | |
|---|
| 23 | if (c) |
|---|
| 24 | return classA == c; |
|---|
| 25 | |
|---|
| 26 | return classA == classB || classA == classC || |
|---|
| 27 | classC == classA || |
|---|
| 28 | classA == classD; // expected-warning {{comparison of distinct pointer types ('Class<SomeProtocol>' and 'Class<SomeProtocol1>')}} |
|---|
| 29 | } |
|---|
| 30 | |
|---|
| 31 | // rdar://18491222 |
|---|
| 32 | @protocol NSObject @end |
|---|
| 33 | |
|---|
| 34 | @interface NSObject @end |
|---|
| 35 | @protocol ProtocolX <NSObject> |
|---|
| 36 | @end |
|---|
| 37 | |
|---|
| 38 | @protocol ProtocolY <NSObject> |
|---|
| 39 | @end |
|---|
| 40 | |
|---|
| 41 | @interface ClassA : NSObject |
|---|
| 42 | @end |
|---|
| 43 | |
|---|
| 44 | @interface ClassB : ClassA <ProtocolY, ProtocolX> |
|---|
| 45 | @end |
|---|
| 46 | |
|---|
| 47 | @interface OtherClass : NSObject |
|---|
| 48 | @property (nonatomic, copy) ClassB<ProtocolX> *aProperty; |
|---|
| 49 | - (ClassA<ProtocolY> *)aMethod; |
|---|
| 50 | - (ClassA<ProtocolY> *)anotherMethod; |
|---|
| 51 | @end |
|---|
| 52 | |
|---|
| 53 | @implementation OtherClass |
|---|
| 54 | - (ClassA<ProtocolY> *)aMethod { |
|---|
| 55 | // This does not work, even though ClassB subclasses from A and conforms to Y |
|---|
| 56 | // because the property type explicitly adds ProtocolX conformance |
|---|
| 57 | // even though ClassB already conforms to ProtocolX |
|---|
| 58 | return self.aProperty; |
|---|
| 59 | } |
|---|
| 60 | - (ClassA<ProtocolY> *)anotherMethod { |
|---|
| 61 | // This works, even though all it is doing is removing an explicit |
|---|
| 62 | // protocol conformance that ClassB already conforms to |
|---|
| 63 | return (ClassB *)self.aProperty; |
|---|
| 64 | } |
|---|
| 65 | @end |
|---|
| 66 | |
|---|