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1// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-runtime=macosx-10.13.0 -fblocks -fobjc-arc %s -verify
2// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-runtime=macosx-10.13.0 -fblocks -fobjc-arc -xobjective-c++ %s -verify
3
4#define EXT_RET __attribute__((objc_externally_retained))
5
6@interface ObjCTy
7@end
8
9void test1() {
10  EXT_RET int a; // expected-warning{{'objc_externally_retained' can only be applied to}}
11  EXT_RET __weak ObjCTy *b; // expected-warning{{'objc_externally_retained' can only be applied to}}
12  EXT_RET __weak int (^c)(); // expected-warning{{'objc_externally_retained' can only be applied to}}
13
14  EXT_RET int (^d)() = ^{return 0;};
15  EXT_RET ObjCTy *e = 0;
16  EXT_RET __strong ObjCTy *f = 0;
17
18  e = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
19  f = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
20  d = ^{ return 0; }; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
21}
22
23void test2(ObjCTy *a);
24
25void test2(ObjCTy *a) EXT_RET {
26  a = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
27}
28
29EXT_RET ObjCTy *test3; // expected-warning{{'objc_externally_retained' can only be applied to}}
30
31@interface X // expected-warning{{defined without specifying a base class}} expected-note{{add a super class}}
32-(void)m: (ObjCTy *) p;
33@end
34@implementation X
35-(void)m: (ObjCTy *) p EXT_RET {
36  p = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
37}
38@end
39
40void test4() {
41  __attribute__((objc_externally_retained(0))) ObjCTy *a; // expected-error{{'objc_externally_retained' attribute takes no arguments}}
42}
43
44void test5(ObjCTy *first, __strong ObjCTy *second) EXT_RET {
45  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
46  second = 0; // fine
47}
48
49void test6(ObjCTy *first,
50           __strong ObjCTy *second) EXT_RET {
51  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
52  second = 0;
53}
54
55__attribute__((objc_root_class)) @interface Y @end
56
57@implementation Y
58- (void)test7:(__strong ObjCTy *)first
59    withThird:(ObjCTy *)second EXT_RET {
60  first = 0;
61  second = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
62}
63@end
64
65void (^blk)(ObjCTy *, ObjCTy *) =
66    ^(__strong ObjCTy *first, ObjCTy *second) EXT_RET {
67  first = 0;
68  second = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
69};
70
71void (^blk2)(ObjCTy *, ObjCTy *) =
72    ^(__strong ObjCTy *first, ObjCTy *second) __attribute__((objc_externally_retained)) {
73  first = 0;
74  second = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
75};
76
77void test8(EXT_RET ObjCTy *x) {} // expected-warning{{'objc_externally_retained' attribute only applies to variables}}
78
79#pragma clang attribute ext_ret.push(__attribute__((objc_externally_retained)), apply_to=any(function, block, objc_method))
80void test9(ObjCTy *first, __strong ObjCTy *second) {
81  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
82  second = 0;
83}
84void (^test10)(ObjCTy *first, ObjCTy *second) = ^(ObjCTy *first, __strong ObjCTy *second) {
85  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
86  second = 0;
87};
88__attribute__((objc_root_class)) @interface Test11 @end
89@implementation Test11
90-(void)meth: (ObjCTy *)first withSecond:(__strong ObjCTy *)second {
91  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
92  second = 0;
93}
94+(void)othermeth: (ObjCTy *)first withSecond:(__strong ObjCTy *)second {
95  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
96  second = 0;
97}
98@end
99
100#if __cplusplus
101class Test12 {
102  void inline_member(ObjCTy *first, __strong ObjCTy *second) {
103    first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
104    second = 0;
105  }
106  static void static_inline_member(ObjCTy *first, __strong ObjCTy *second) {
107    first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
108    second = 0;
109  }
110};
111#endif
112
113void test13(ObjCTy *first, __weak ObjCTy *second, __unsafe_unretained ObjCTy *third, __strong ObjCTy *fourth) {
114  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
115  second = 0;
116  third = 0;
117  fourth = 0;
118}
119
120#pragma clang attribute ext_ret.pop
121
122__attribute__((objc_externally_retained))
123void unprototyped();
124