| @interface NSString (ss) | |
| - (NSString *):(NSString *)str; | |
| @end | |
| @implementation NSString (ss) | |
| - (NSString *):(NSString *)str { | |
| return [NSString stringWithFormat:self, str]; | |
| } | |
| @end | |
| void testFunc() { | |
| NSString *testStrig = [@"Hello %@": @"world"]; | |
| } | |
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