Douglas Gregor | 4c4efee | 2011-06-13 16:42:53 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -verify %s |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 2 | |
| 3 | @interface Unrelated |
| 4 | @end |
| 5 | |
| 6 | @interface NSObject |
| 7 | + (id)new; |
| 8 | + (id)alloc; |
| 9 | - (NSObject *)init; |
| 10 | |
| 11 | - (id)retain; // expected-note 2{{instance method 'retain' is assumed to return an instance of its receiver type ('NSArray *')}} |
| 12 | - autorelease; |
| 13 | |
| 14 | - (id)self; |
| 15 | |
| 16 | - (id)copy; |
| 17 | - (id)mutableCopy; |
| 18 | |
| 19 | // Do not infer when instance/class mismatches |
| 20 | - (id)newNotInferred; |
| 21 | - (id)alloc; |
| 22 | + (id)initWithBlarg; |
| 23 | + (id)self; |
| 24 | |
| 25 | // Do not infer when the return types mismatch. |
| 26 | - (Unrelated *)initAsUnrelated; |
| 27 | @end |
| 28 | |
| 29 | @interface NSString : NSObject |
| 30 | - (id)init; |
| 31 | - (id)initWithCString:(const char*)string; |
| 32 | @end |
| 33 | |
| 34 | @interface NSArray : NSObject |
| 35 | - (unsigned)count; |
| 36 | @end |
| 37 | |
| 38 | @interface NSBlah |
| 39 | @end |
| 40 | |
| 41 | @interface NSMutableArray : NSArray |
| 42 | @end |
| 43 | |
| 44 | @interface NSBlah () |
| 45 | + (Unrelated *)newUnrelated; |
| 46 | @end |
| 47 | |
| 48 | void test_inference() { |
| 49 | // Inference based on method family |
| 50 | __typeof__(([[NSString alloc] init])) *str = (NSString**)0; |
| 51 | __typeof__(([[[[NSString new] self] retain] autorelease])) *str2 = (NSString **)0; |
| 52 | __typeof__(([[NSString alloc] initWithCString:"blah"])) *str3 = (NSString**)0; |
| 53 | |
| 54 | // Not inferred |
| 55 | __typeof__(([[NSString new] copy])) *id1 = (id*)0; |
| 56 | |
| 57 | // Not inferred due to instance/class mismatches |
| 58 | __typeof__(([[NSString new] newNotInferred])) *id2 = (id*)0; |
| 59 | __typeof__(([[NSString new] alloc])) *id3 = (id*)0; |
| 60 | __typeof__(([NSString self])) *id4 = (id*)0; |
| 61 | __typeof__(([NSString initWithBlarg])) *id5 = (id*)0; |
| 62 | |
| 63 | // Not inferred due to return type mismatch |
| 64 | __typeof__(([[NSString alloc] initAsUnrelated])) *unrelated = (Unrelated**)0; |
| 65 | __typeof__(([NSBlah newUnrelated])) *unrelated2 = (Unrelated**)0; |
| 66 | |
| 67 | NSArray *arr = [[NSMutableArray alloc] init]; |
| 68 | NSMutableArray *marr = [arr retain]; // expected-warning{{incompatible pointer types initializing 'NSMutableArray *' with an expression of type 'NSArray *'}} |
Douglas Gregor | 8cf0d22 | 2011-06-11 04:42:12 +0000 | [diff] [blame] | 69 | marr = [arr retain]; // expected-warning{{incompatible pointer types assigning to 'NSMutableArray *' from 'NSArray *'}} |
Douglas Gregor | 0833f1f | 2011-06-11 04:42:58 +0000 | [diff] [blame] | 70 | arr = [marr retain]; |
Douglas Gregor | 926df6c | 2011-06-11 01:09:30 +0000 | [diff] [blame] | 71 | } |