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// RUN: %clang_cc1 -fobjc-infer-related-result-type -verify %s
@interface Unrelated
@end
@interface NSObject
+ (id)new;
+ (id)alloc;
- (NSObject *)init;
- (id)retain; // expected-note{{instance method 'retain' is assumed to return an instance of its receiver type ('NSArray *')}}
- autorelease;
- (id)self;
- (id)copy;
- (id)mutableCopy;
// Do not infer when instance/class mismatches
- (id)newNotInferred;
- (id)alloc;
+ (id)initWithBlarg;
+ (id)self;
// Do not infer when the return types mismatch.
- (Unrelated *)initAsUnrelated;
@end
@interface NSString : NSObject
- (id)init;
- (id)initWithCString:(const char*)string;
@end
@interface NSArray : NSObject
- (unsigned)count;
@end
@interface NSBlah
@end
@interface NSMutableArray : NSArray
@end
@interface NSBlah ()
+ (Unrelated *)newUnrelated;
@end
void test_inference() {
// Inference based on method family
__typeof__(([[NSString alloc] init])) *str = (NSString**)0;
__typeof__(([[[[NSString new] self] retain] autorelease])) *str2 = (NSString **)0;
__typeof__(([[NSString alloc] initWithCString:"blah"])) *str3 = (NSString**)0;
// Not inferred
__typeof__(([[NSString new] copy])) *id1 = (id*)0;
// Not inferred due to instance/class mismatches
__typeof__(([[NSString new] newNotInferred])) *id2 = (id*)0;
__typeof__(([[NSString new] alloc])) *id3 = (id*)0;
__typeof__(([NSString self])) *id4 = (id*)0;
__typeof__(([NSString initWithBlarg])) *id5 = (id*)0;
// Not inferred due to return type mismatch
__typeof__(([[NSString alloc] initAsUnrelated])) *unrelated = (Unrelated**)0;
__typeof__(([NSBlah newUnrelated])) *unrelated2 = (Unrelated**)0;
NSArray *arr = [[NSMutableArray alloc] init];
NSMutableArray *marr = [arr retain]; // expected-warning{{incompatible pointer types initializing 'NSMutableArray *' with an expression of type 'NSArray *'}}
}
@implementation NSBlah
+ (Unrelated *)newUnrelated {
return (Unrelated *)0;
}
@end
@implementation NSBlah (Cat)
+ (Unrelated *)newUnrelated2 {
return (Unrelated *)0;
}
@end
@interface A
- (id)initBlah; // expected-note 2{{overridden method is part of the 'init' method family}}
@end
@interface B : A
- (Unrelated *)initBlah; // expected-warning{{method is expected to return an instance of its class type 'B', but is declared to return 'Unrelated *'}}
@end
@interface C : A
@end
@implementation C
- (Unrelated *)initBlah { // expected-warning{{method is expected to return an instance of its class type 'C', but is declared to return 'Unrelated *'}}
return (Unrelated *)0;
}
@end
@interface D
+ (id)newBlarg; // expected-note{{overridden method is part of the 'new' method family}}
@end
@interface D ()
+ alloc; // expected-note{{overridden method is part of the 'alloc' method family}}
@end
@implementation D
+ (Unrelated *)newBlarg { // expected-warning{{method is expected to return an instance of its class type 'D', but is declared to return 'Unrelated *'}}
return (Unrelated *)0;
}
+ (Unrelated *)alloc { // expected-warning{{method is expected to return an instance of its class type 'D', but is declared to return 'Unrelated *'}}
return (Unrelated *)0;
}
@end
@protocol P1
- (id)initBlah; // expected-note{{overridden method is part of the 'init' method family}}
- (int)initBlarg;
@end
@protocol P2 <P1>
- (int)initBlah; // expected-warning{{protocol method is expected to return an instance of the implementing class, but is declared to return 'int'}}
- (int)initBlarg;
- (int)initBlech;
@end
@interface E
- init;
@end
@implementation E
- init {
return self;
}
@end
@protocol P3
+ (NSString *)newString;
@end
@interface F<P3>
@end
@implementation F
+ (NSString *)newString { return @"blah"; }
@end
// <rdar://problem/9340699>
@interface G
- (id)_ABC_init __attribute__((objc_method_family(init)));
@end
@interface G (Additions)
- (id)_ABC_init2 __attribute__((objc_method_family(init)));
@end
@implementation G (Additions)
- (id)_ABC_init {
return 0;
}
- (id)_ABC_init2 {
return 0;
}
- (id)_ABC_init3 {
return 0;
}
@end
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