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1 // RUN: %clang_cc1 -emit-llvm -triple x86_64-apple-darwin %s -o /dev/null
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2
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3 typedef unsigned int size_t;
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4 @protocol P @end
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5
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6 @interface NSMutableArray
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7 #if __has_feature(objc_subscripting)
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8 - (id)objectAtIndexedSubscript:(size_t)index;
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9 - (void)setObject:(id)object atIndexedSubscript:(size_t)index;
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10 #endif
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11 @end
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12
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13 #if __has_feature(objc_subscripting)
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14 @interface XNSMutableArray
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15 - (id)objectAtIndexedSubscript:(size_t)index;
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16 - (void)setObject:(id)object atIndexedSubscript:(size_t)index;
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17 #endif
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18 @end
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19
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20 @interface NSMutableDictionary
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21 - (id)objectForKeyedSubscript:(id)key;
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22 - (void)setObject:(id)object forKeyedSubscript:(id)key;
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23 @end
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24
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25 @class NSString;
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26
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27 int main() {
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28 NSMutableArray<P> * array;
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29 id oldObject = array[10];
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30
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31 array[10] = oldObject;
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32
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33 id unknown_array;
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34 oldObject = unknown_array[1];
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35
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36 unknown_array[1] = oldObject;
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37
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38 NSMutableDictionary *dictionary;
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39 NSString *key;
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40 id newObject;
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41 oldObject = dictionary[key];
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42 dictionary[key] = newObject; // replace oldObject with newObject
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43
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44 }
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45
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