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#ifdef __GNUC__
# define __GCC_VERSION__ (__GNUC__ * 100 + __GNUC_MINOR__)
#else
# define __GCC_VERSION__ 0
#endif
#if defined(__clang__)
# define OF_HAVE_PROPERTIES
# define OF_HAVE_OPTIONAL_PROTOCOLS
# define OF_HAVE_FAST_ENUMERATION
#elif __GCC_VERSION__ >= 406 || defined(OBJC_NEW_PROPERTIES)
# define OF_HAVE_PROPERTIES
# define OF_HAVE_OPTIONAL_PROTOCOLS
# define OF_HAVE_FAST_ENUMERATION
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#ifdef __GNUC__
# define __GCC_VERSION__ (__GNUC__ * 100 + __GNUC_MINOR__)
#else
# define __GCC_VERSION__ 0
#endif
#if defined(__clang__) || __GCC_VERSION__ >= 406 || defined(OBJC_NEW_PROPERTIES)
# define OF_HAVE_PROPERTIES
# define OF_HAVE_OPTIONAL_PROTOCOLS
# define OF_HAVE_FAST_ENUMERATION
# define OF_HAVE_CLASS_EXTENSIONS
#endif
#if !__has_feature(objc_instancetype)
# define instancetype id
#endif
#if __has_feature(blocks)
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