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#ifdef __clang__
#define FOR_IN(type, var, collection) \
for (type var in collection)\
{
#define END_FOR_IN(collection) }
#else
void objc_enumerationMutation(id);
#define FOR_IN(type, var, c) \
do\
{\
type var;\
NSFastEnumerationState gs_##c##_enumState = { 0 };\
id gs_##c##_items[16];\
unsigned long gs_##c##_limit = \
[c countByEnumeratingWithState: &gs_##c##_enumState \
objects: gs_##c##_items \
count: 16];\
if (gs_##c##_limit)\
{\
unsigned long gs_startMutations = *gs_##c##_enumState.mutationsPtr;\
do {\
unsigned long gs_##c##counter = 0;\
do {\
if (gs_startMutations != *gs_##c##_enumState.mutationsPtr)\
{\
objc_enumerationMutation(c);\
}\
var = gs_##c##_enumState.itemsPtr[gs_##c##counter++];\
#define END_FOR_IN(c) \
} while (gs_##c##counter < gs_##c##_limit);\
} while ((gs_##c##_limit = [c countByEnumeratingWithState: &gs_##c##_enumState\
objects: gs_##c##_items\
count: 16]));\
}\
} while(0);
#endif
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