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AlanQuatermain/gist:1046799

Created June 25, 2011 19:22
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A simple macro to create a non-retaining reference to an object for use within a block. For variable 'foo' will create non-retained variable '_block_foo' of type 'id'.
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gistfile1.m
#if __has_feature(arr)
# if __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_5_0
# define block_unretained(obj) id _block_##obj __weak = (obj)
# else
# define block_unretained(obj) id _block_##obj __unsafe_unretained = (obj)
#else
# define block_unretained(obj) id _block_##obj __block = (obj)
#endif
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