Weak Sauce

gistfile1.m

#import <Foundation/Foundation.h>

@interface FMFancyObject : NSObject {
    
}

@end

@interface FMDeallocCheckerObjectHolder : NSObject {
    __weak id _holdingObject;
}

@property (weak) id holdingObject;
@end

@implementation FMDeallocCheckerObjectHolder

@synthesize holdingObject=_holdingObject;

@end


@implementation FMFancyObject 

- (void)dealloc {
    NSLog(@"FMFancyObject dealloc!");
    [super dealloc];
}


@end



int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    FMDeallocCheckerObjectHolder *objh = [FMDeallocCheckerObjectHolder new];
    
    FMFancyObject *foo = [FMFancyObject new];
    
    [objh setHoldingObject:foo];
    
    NSLog(@"Releasing…");
    
    [foo release];
    
    NSLog(@"Released!");
    
    if ([objh holdingObject]) {
        NSLog(@"wait, what?  you should not be seeing this line");
    }
    
    [objh release];
    
    
    [pool drain];
    return 0;
}

/*
 2011-08-04 17:12:55.863 weaksauce[31567:1307] Releasing…
 2011-08-04 17:12:55.866 weaksauce[31567:1307] FMFancyObject dealloc!
 2011-08-04 17:12:55.867 weaksauce[31567:1307] Released!
 2011-08-04 17:12:55.868 weaksauce[31567:1307] wait, what?  you should not be seeing this line
 
*/