1// RUN: %clang_cc1 -fsyntax-only -verify -pedantic %s
2
3@protocol NSObject
4@end
5@interface NSObject <NSObject> {
6}
7@end
8@interface NSString : NSObject
9@end
10void __setRetained(id *ivar, id value, NSObject **o) {
11    *ivar = value;
12}
13static NSString *_logProcessPrefix = 0;
14void func() {
15  __setRetained(&_logProcessPrefix, _logProcessPrefix, &_logProcessPrefix);
16}
17@implementation NSObject (ScopeAdditions)
18+ (void)setObjectLogProcessPrefix:(NSString *)processPrefix {
19    __setRetained(&_logProcessPrefix, processPrefix, &_logProcessPrefix);
20}
21@end
22
23@class Derived;
24
25NSObject *ExternFunc (NSObject *filePath, NSObject *key);
26typedef id FuncSignature (NSObject *arg1, Derived *arg2);
27
28@interface Derived: NSObject
29+ (void)registerFunc:(FuncSignature *)function; // expected-note{{passing argument to parameter 'function' here}}
30@end
31
32void foo(void)
33{
34  // GCC currently allows this (it has some fiarly new support for covariant return types and contravariant argument types).
35  // Since registerFunc: expects a Derived object as it's second argument, I don't know why this would be legal.
36  [Derived registerFunc: ExternFunc];  // expected-warning{{incompatible pointer types sending 'NSObject *(NSObject *, NSObject *)' to parameter of type 'FuncSignature *'}}
37}
38