1// RUN: %clang_cc1 -verify -o - %s
2
3__attribute__((objc_root_class))
4@interface Root @end
5
6// Test reference binding.
7
8typedef struct {
9  int f0;
10  int f1;
11} T;
12
13@interface A : Root
14@property (assign) T p0;
15@property (assign) T& p1;
16@end
17
18int f0(const T& t) {
19  return t.f0;
20}
21
22int f1(A *a) {
23  return f0(a.p0);
24}
25
26int f2(A *a) {
27  return f0(a.p1);
28}
29
30// PR7740
31@class NSString;
32
33void f3(id);
34void f4(NSString &tmpstr) {
35  f3(&tmpstr);
36}
37
38// PR7741
39@protocol P1 @end
40@protocol P2 @end
41@protocol P3 @end
42@interface foo<P1> {} @end
43@interface bar : foo <P1, P2, P3> {} @end
44typedef bar baz;
45
46struct ToBar {
47  operator bar&() const;
48};
49
50void f5(foo&);
51void f5b(foo<P1>&);
52void f5c(foo<P2>&);
53void f5d(foo<P3>&);
54void f6(baz* x) {
55  f5(*x);
56  f5b(*x);
57  f5c(*x);
58  f5d(*x);
59  (void)((foo&)*x);
60  f5(ToBar());
61  f5b(ToBar());
62  f5c(ToBar());
63  f5d(ToBar());
64  (void)((foo&)ToBar());
65}
66
67// rdar://13794269
68@interface B : Root @end
69@implementation B {
70  unsigned bf : 4; // expected-note {{declared here}}
71}
72
73- (void) foo {
74  unsigned &i = bf; // expected-error {{non-const reference cannot bind to bit-field 'bf'}}
75}
76@end
77