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justin/gist:2298197

Created April 4, 2012 05:48
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gistfile1.m
#ifndef SG_WEAK
#if defined __IPHONE_OS_VERSION_MIN_REQUIRED
#if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_4_3
#define __SG_WEAK __weak
#define SG_WEAK weak
#else
#define __SG_WEAK __unsafe_unretained
#define SG_WEAK unsafe_unretained
#endif
#elif defined __MAC_OS_X_VERSION_MIN_REQUIRED
#if __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_6
#define __SG_WEAK __weak
#define SG_WEAK weak
#else
#define __SG_WEAK __unsafe_unretained
#define SG_WEAK unsafe_unretained
#endif
#endif
#endif
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