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Abizern/dct_weak.h

Forked from danielctull/dct_weak.h
Created November 10, 2011 04:19
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ARC macros for weak references
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dct_weak.h
#import <Availability.h>
#if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_4_3
#warning "This library uses ARC which is only available in iOS SDK 4.3 and later."
#endif
#if !defined dct_weak && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_5_0
#define dct_weak weak
#define __dct_weak __weak
#define dct_nil(x)
#elif !defined dct_weak && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_4_3
#define dct_weak unsafe_unretained
#define __dct_weak __unsafe_unretained
#define dct_nil(x) x = nil
#endif
@steipete
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"ARC is supported in Xcode 4.2 for Mac OS X v10.6 and v10.7 (64-bit applications) and for iOS 4 and iOS 5. Weak references are not supported in Mac OS X v10.6 and iOS 4." (http://developer.apple.com/library/mac/#releasenotes/ObjectiveC/RN-TransitioningToARC/_index.html#//apple_ref/doc/uid/TP40011226)

So stating that you need 4.3 is not true. Anway, the macro idea is great, thanks!

@danielctull
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I've also just realised that there should be a check for Mac OS version as well. Will have a look at some point :)

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