1// RUN: %clang_cc1  -fsyntax-only -verify %s
2
3typedef unsigned int size_t;
4@protocol P @end
5
6@interface NSMutableArray
7- (id)objectAtIndexedSubscript:(size_t)index;
8- (void)setObject:(id)object atIndexedSubscript:(size_t)index;
9@end
10
11@interface NSMutableDictionary
12- (id)objectForKeyedSubscript:(id)key;
13- (void)setObject:(id)object forKeyedSubscript:(size_t)key;
14@end
15
16id func() {
17  NSMutableArray *array;
18  float f;
19  array[f] = array; // expected-error {{indexing expression is invalid because subscript type 'float' is not an integral or Objective-C pointer type}}
20  return array[3.14]; // expected-error {{indexing expression is invalid because subscript type 'double' is not an integral or Objective-C pointer type}}
21}
22
23void test_unused() {
24  NSMutableArray *array;
25  array[10]; // expected-warning {{container access result unused - container access should not be used for side effects}}
26
27  NSMutableDictionary *dict;
28  dict[array]; // expected-warning {{container access result unused - container access should not be used for side effects}}
29}
30
31void testQualifiedId(id<P> qualifiedId) {
32  id object = qualifiedId[10];   // expected-error {{expected method to read array element not found on object of type 'id<P>'}}
33  qualifiedId[10] = qualifiedId; // expected-error {{expected method to write array element not found on object of type 'id<P>'}}
34}
35
36void testUnqualifiedId(id unqualId) {
37  id object = unqualId[10];
38  unqualId[10] = object;
39}
40
41@protocol Subscriptable
42- (id)objectAtIndexedSubscript:(size_t)index;
43- (void)setObject:(id)object atIndexedSubscript:(size_t)index;
44@end
45
46void testValidQualifiedId(id<Subscriptable> qualifiedId) {
47  id object = qualifiedId[10];
48  qualifiedId[10] = object;
49}
50