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// RUN: %clang_cc1 -analyze -analyzer-checker=core,alpha.core.DynamicTypeChecker -verify %s
#define nil 0
typedef unsigned long NSUInteger;
typedef int BOOL;
@protocol NSObject
+ (id)alloc;
- (id)init;
@end
@protocol NSCopying
@end
__attribute__((objc_root_class))
@interface NSObject <NSObject>
@end
@interface NSString : NSObject <NSCopying>
@end
@interface NSMutableString : NSString
@end
@interface NSNumber : NSObject <NSCopying>
@end
@class MyType;
void testTypeCheck(NSString* str) {
id obj = str;
NSNumber *num = obj; // expected-warning {{}}
(void)num;
}
void testForwardDeclarations(NSString* str) {
id obj = str;
// Do not warn, since no information is available wether MyType is a sub or
// super class of any other type.
MyType *num = obj; // no warning
(void)num;
}
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