| /* When assigning function pointers, allow for covariant return types | |
| and contravariant argument types. */ | |
| /* { dg-do compile } */ | |
| #include <objc/Object.h> | |
| @class Derived; | |
| Object *ExternFunc (Object *filePath, Object *key); | |
| typedef id FuncSignature (Object *arg1, Derived *arg2); | |
| @interface Derived: Object | |
| + (void)registerFunc:(FuncSignature *)function; | |
| @end | |
| void foo(void) | |
| { | |
| [Derived registerFunc: ExternFunc]; | |
| } | |