Clang Project

clang_source_code/test/SemaObjCXX/objc-weak-type-traits.mm
1// RUN: %clang_cc1 -fsyntax-only -fobjc-weak -fobjc-runtime-has-weak -verify -std=c++11 %s
2// expected-no-diagnostics
3
4// Check the results of the various type-trait query functions on
5// lifetime-qualified types in ObjC Weak.
6
7#define TRAIT_IS_TRUE(Trait, Type) static_assert(Trait(Type), "")
8#define TRAIT_IS_FALSE(Trait, Type) static_assert(!Trait(Type), "")
9#define TRAIT_IS_TRUE_2(Trait, Type1, Type2) static_assert(Trait(Type1, Type2), "")
10#define TRAIT_IS_FALSE_2(Trait, Type1, Type2) static_assert(!Trait(Type1, Type2), "")
11  
12struct HasStrong { id obj; };
13struct HasWeak { __weak id obj; };
14struct HasUnsafeUnretained { __unsafe_unretained id obj; };
15
16// __has_nothrow_assign
17TRAIT_IS_TRUE(__has_nothrow_assign, __strong id);
18TRAIT_IS_TRUE(__has_nothrow_assign, __weak id);
19TRAIT_IS_TRUE(__has_nothrow_assign, __autoreleasing id);
20TRAIT_IS_TRUE(__has_nothrow_assign, __unsafe_unretained id);
21TRAIT_IS_TRUE(__has_nothrow_assign, HasStrong);
22TRAIT_IS_TRUE(__has_nothrow_assign, HasWeak);
23TRAIT_IS_TRUE(__has_nothrow_assign, HasUnsafeUnretained);
24
25// __has_nothrow_copy
26TRAIT_IS_TRUE(__has_nothrow_copy, __strong id);
27TRAIT_IS_TRUE(__has_nothrow_copy, __weak id);
28TRAIT_IS_TRUE(__has_nothrow_copy, __autoreleasing id);
29TRAIT_IS_TRUE(__has_nothrow_copy, __unsafe_unretained id);
30TRAIT_IS_TRUE(__has_nothrow_copy, HasStrong);
31TRAIT_IS_TRUE(__has_nothrow_copy, HasWeak);
32TRAIT_IS_TRUE(__has_nothrow_copy, HasUnsafeUnretained);
33
34// __has_nothrow_constructor
35TRAIT_IS_TRUE(__has_nothrow_constructor, __strong id);
36TRAIT_IS_TRUE(__has_nothrow_constructor, __weak id);
37TRAIT_IS_TRUE(__has_nothrow_constructor, __autoreleasing id);
38TRAIT_IS_TRUE(__has_nothrow_constructor, __unsafe_unretained id);
39TRAIT_IS_TRUE(__has_nothrow_constructor, HasStrong);
40TRAIT_IS_TRUE(__has_nothrow_constructor, HasWeak);
41TRAIT_IS_TRUE(__has_nothrow_constructor, HasUnsafeUnretained);
42
43// __has_trivial_assign
44TRAIT_IS_TRUE(__has_trivial_assign, __strong id);
45TRAIT_IS_FALSE(__has_trivial_assign, __weak id);
46TRAIT_IS_TRUE(__has_trivial_assign, __autoreleasing id);
47TRAIT_IS_TRUE(__has_trivial_assign, __unsafe_unretained id);
48TRAIT_IS_TRUE(__has_trivial_assign, HasStrong);
49TRAIT_IS_FALSE(__has_trivial_assign, HasWeak);
50TRAIT_IS_TRUE(__has_trivial_assign, HasUnsafeUnretained);
51
52// __has_trivial_copy
53TRAIT_IS_TRUE(__has_trivial_copy, __strong id);
54TRAIT_IS_FALSE(__has_trivial_copy, __weak id);
55TRAIT_IS_TRUE(__has_trivial_copy, __autoreleasing id);
56TRAIT_IS_TRUE(__has_trivial_copy, __unsafe_unretained id);
57TRAIT_IS_TRUE(__has_trivial_copy, HasStrong);
58TRAIT_IS_FALSE(__has_trivial_copy, HasWeak);
59TRAIT_IS_TRUE(__has_trivial_copy, HasUnsafeUnretained);
60
61// __has_trivial_constructor
62TRAIT_IS_TRUE(__has_trivial_constructor, __strong id);
63TRAIT_IS_FALSE(__has_trivial_constructor, __weak id);
64TRAIT_IS_TRUE(__has_trivial_constructor, __autoreleasing id);
65TRAIT_IS_TRUE(__has_trivial_constructor, __unsafe_unretained id);
66TRAIT_IS_TRUE(__has_trivial_constructor, HasStrong);
67TRAIT_IS_FALSE(__has_trivial_constructor, HasWeak);
68TRAIT_IS_TRUE(__has_trivial_constructor, HasUnsafeUnretained);
69
70// __has_trivial_destructor
71TRAIT_IS_TRUE(__has_trivial_destructor, __strong id);
72TRAIT_IS_FALSE(__has_trivial_destructor, __weak id);
73TRAIT_IS_TRUE(__has_trivial_destructor, __autoreleasing id);
74TRAIT_IS_TRUE(__has_trivial_destructor, __unsafe_unretained id);
75TRAIT_IS_TRUE(__has_trivial_destructor, HasStrong);
76TRAIT_IS_FALSE(__has_trivial_destructor, HasWeak);
77TRAIT_IS_TRUE(__has_trivial_destructor, HasUnsafeUnretained);
78
79// __is_literal
80TRAIT_IS_TRUE(__is_literal, __strong id);
81TRAIT_IS_TRUE(__is_literal, __weak id);
82TRAIT_IS_TRUE(__is_literal, __autoreleasing id);
83TRAIT_IS_TRUE(__is_literal, __unsafe_unretained id);
84
85// __is_literal_type
86TRAIT_IS_TRUE(__is_literal_type, __strong id);
87TRAIT_IS_TRUE(__is_literal_type, __weak id);
88TRAIT_IS_TRUE(__is_literal_type, __autoreleasing id);
89TRAIT_IS_TRUE(__is_literal_type, __unsafe_unretained id);
90
91// __is_pod
92TRAIT_IS_TRUE(__is_pod, __strong id);
93TRAIT_IS_FALSE(__is_pod, __weak id);
94TRAIT_IS_TRUE(__is_pod, __autoreleasing id);
95TRAIT_IS_TRUE(__is_pod, __unsafe_unretained id);
96TRAIT_IS_TRUE(__is_pod, HasStrong);
97TRAIT_IS_FALSE(__is_pod, HasWeak);
98TRAIT_IS_TRUE(__is_pod, HasUnsafeUnretained);
99
100// __is_trivial
101TRAIT_IS_TRUE(__is_trivial, __strong id);
102TRAIT_IS_FALSE(__is_trivial, __weak id);
103TRAIT_IS_TRUE(__is_trivial, __autoreleasing id);
104TRAIT_IS_TRUE(__is_trivial, __unsafe_unretained id);
105TRAIT_IS_TRUE(__is_trivial, HasStrong);
106TRAIT_IS_FALSE(__is_trivial, HasWeak);
107TRAIT_IS_TRUE(__is_trivial, HasUnsafeUnretained);
108
109// __is_scalar
110TRAIT_IS_TRUE(__is_scalar, __strong id);
111TRAIT_IS_FALSE(__is_scalar, __weak id);
112TRAIT_IS_TRUE(__is_scalar, __autoreleasing id);
113TRAIT_IS_TRUE(__is_scalar, __unsafe_unretained id);
114
115// __is_standard_layout
116TRAIT_IS_TRUE(__is_standard_layout, __strong id);
117TRAIT_IS_TRUE(__is_standard_layout, __weak id);
118TRAIT_IS_TRUE(__is_standard_layout, __autoreleasing id);
119TRAIT_IS_TRUE(__is_standard_layout, __unsafe_unretained id);
120
121// __is_trivally_assignable
122TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __strong id);
123TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __weak id);
124TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __autoreleasing id);
125TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __unsafe_unretained id);
126TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __strong id&&);
127TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __weak id&&);
128TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __autoreleasing id&&);
129TRAIT_IS_TRUE_2(__is_trivially_assignable, __strong id&, __unsafe_unretained id&&);
130TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __strong id);
131TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __weak id);
132TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __autoreleasing id);
133TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __unsafe_unretained id);
134TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __strong id&&);
135TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __weak id&&);
136TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __autoreleasing id&&);
137TRAIT_IS_FALSE_2(__is_trivially_assignable, __weak id&, __unsafe_unretained id&&);
138
139TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __strong id);
140TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __weak id);
141TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __autoreleasing id);
142TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __unsafe_unretained id);
143TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __strong id&&);
144TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __weak id&&);
145TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __autoreleasing id&&);
146TRAIT_IS_TRUE_2(__is_trivially_assignable, __autoreleasing id&, __unsafe_unretained id&&);
147
148TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __strong id);
149TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __weak id);
150TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __autoreleasing id);
151TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __unsafe_unretained id);
152TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __strong id&&);
153TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __weak id&&);
154TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __autoreleasing id&&);
155TRAIT_IS_TRUE_2(__is_trivially_assignable, __unsafe_unretained id&, __unsafe_unretained id&&);
156
157TRAIT_IS_TRUE_2(__is_trivially_assignable, HasStrong&, HasStrong);
158TRAIT_IS_TRUE_2(__is_trivially_assignable, HasStrong&, HasStrong&&);
159TRAIT_IS_FALSE_2(__is_trivially_assignable, HasWeak&, HasWeak);
160TRAIT_IS_FALSE_2(__is_trivially_assignable, HasWeak&, HasWeak&&);
161TRAIT_IS_TRUE_2(__is_trivially_assignable, HasUnsafeUnretained&, HasUnsafeUnretained);
162TRAIT_IS_TRUE_2(__is_trivially_assignable, HasUnsafeUnretained&, HasUnsafeUnretained&&);
163
164// __is_trivally_constructible
165TRAIT_IS_TRUE(__is_trivially_constructible, __strong id);
166TRAIT_IS_FALSE(__is_trivially_constructible, __weak id);
167TRAIT_IS_TRUE(__is_trivially_constructible, __autoreleasing id);
168TRAIT_IS_TRUE(__is_trivially_constructible, __unsafe_unretained id);
169
170TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __strong id);
171TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __weak id);
172TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __autoreleasing id);
173TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __unsafe_unretained id);
174TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __strong id&&);
175TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __weak id&&);
176TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __autoreleasing id&&);
177TRAIT_IS_TRUE_2(__is_trivially_constructible, __strong id, __unsafe_unretained id&&);
178TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __strong id);
179TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __weak id);
180TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __autoreleasing id);
181TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __unsafe_unretained id);
182TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __strong id&&);
183TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __weak id&&);
184TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __autoreleasing id&&);
185TRAIT_IS_FALSE_2(__is_trivially_constructible, __weak id, __unsafe_unretained id&&);
186
187TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __strong id);
188TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __weak id);
189TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __autoreleasing id);
190TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __unsafe_unretained id);
191TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __strong id&&);
192TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __weak id&&);
193TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __autoreleasing id&&);
194TRAIT_IS_TRUE_2(__is_trivially_constructible, __autoreleasing id, __unsafe_unretained id&&);
195
196TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __strong id);
197TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __weak id);
198TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __autoreleasing id);
199TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __unsafe_unretained id);
200TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __strong id&&);
201TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __weak id&&);
202TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __autoreleasing id&&);
203TRAIT_IS_TRUE_2(__is_trivially_constructible, __unsafe_unretained id, __unsafe_unretained id&&);
204
205TRAIT_IS_TRUE_2(__is_trivially_constructible, HasStrong, HasStrong);
206TRAIT_IS_TRUE_2(__is_trivially_constructible, HasStrong, HasStrong&&);
207TRAIT_IS_FALSE_2(__is_trivially_constructible, HasWeak, HasWeak);
208TRAIT_IS_FALSE_2(__is_trivially_constructible, HasWeak, HasWeak&&);
209TRAIT_IS_TRUE_2(__is_trivially_constructible, HasUnsafeUnretained, HasUnsafeUnretained);
210TRAIT_IS_TRUE_2(__is_trivially_constructible, HasUnsafeUnretained, HasUnsafeUnretained&&);
211
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