1// RUN: %clang_cc1 -fblocks -analyze -analyzer-checker=osx.cocoa.UnusedIvars -verify -Wno-objc-root-class %s
2
3//===--- BEGIN: Delta-debugging reduced headers. --------------------------===//
4
5@protocol NSObject
6- (id)retain;
7- (oneway void)release;
8@end
9@interface NSObject <NSObject> {}
10- (id)init;
11+ (id)alloc;
12@end
13
14//===--- END: Delta-debugging reduced headers. ----------------------------===//
15
16// This test case tests the basic functionality of the unused ivar test.
17@interface TestA {
18@private
19  int x; // expected-warning {{Instance variable 'x' in class 'TestA' is never used}}
20}
21@end
22@implementation TestA @end
23
24// This test case tests whether the unused ivar check handles blocks that
25// reference an instance variable. (<rdar://problem/7075531>)
26@interface TestB : NSObject {
27@private
28  id _ivar; // no-warning
29}
30@property (readwrite,retain) id ivar;
31@end
32
33@implementation TestB
34- (id)ivar {
35  __attribute__((__blocks__(byref))) id value = ((void*)0);
36  void (^b)() = ^{ value = _ivar; };
37  b();
38  return value;
39}
40
41- (void)setIvar:(id)newValue {
42  void (^b)() = ^{ [_ivar release]; _ivar = [newValue retain]; };
43  b();
44}
45@end
46
47//===----------------------------------------------------------------------===//
48// <rdar://problem/6260004> Detect that ivar is in use, if used in category 
49//  in the same file as the implementation
50//===----------------------------------------------------------------------===//
51
52@protocol Protocol6260004
53- (id) getId;
54@end
55
56@interface RDar6260004 {
57@private
58  id x; // no-warning
59}
60@end
61@implementation RDar6260004 @end
62@implementation RDar6260004 (Protocol6260004)
63- (id) getId {
64  return x;
65}
66@end
67
68//===----------------------------------------------------------------------===//
69// <rdar://problem/7254495> - ivars referenced by lexically nested functions
70//  should not be flagged as unused
71//===----------------------------------------------------------------------===//
72
73@interface RDar7254495 {
74@private
75  int x; // no-warning
76}
77@end
78
79@implementation RDar7254495
80int radar_7254495(RDar7254495 *a) {
81  return a->x;
82}
83@end
84
85//===----------------------------------------------------------------------===//
86// <rdar://problem/7353683> - consult attribute((unused)) to silence warnings
87// about unused instance variables
88//===----------------------------------------------------------------------===//
89
90@interface RDar7353683 {
91@private
92  id x __attribute__((unused));
93}
94@end
95
96@implementation RDar7353683
97@end
98//===----------------------------------------------------------------------===//
99// <rdar://problem/8481311> Unused bitfield ivars trigger cause weird
100// diagnostic: "Instance variable '' in class..."
101//===----------------------------------------------------------------------===//
102
103@interface RDar8481311 {
104@private
105    unsigned bitfield:1; // expected-warning {{Instance variable 'bitfield' in class 'RDar8481311' is never used}}
106}
107@end
108
109@implementation RDar8481311
110@end
111
112@class NSString;
113@interface Radar11059352_1 {
114@private
115    NSString *_pathString;
116}
117@property (readonly, strong) NSString *pathString;
118@end
119
120@interface Radar11059352 {
121@private
122Radar11059352_1 *_workspacePath;
123}
124@end
125
126@implementation Radar11059352
127
128- (void)useWorkspace {
129    NSString *workspacePathString = _workspacePath.pathString;
130}
131@end