1 | // RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fsyntax-only -verify %s -Wno-objc-root-class |
2 | |
3 | // Mark this protocol as requiring all of its methods and properties |
4 | // to be explicitly implemented in the adopting class. |
5 | __attribute__((objc_protocol_requires_explicit_implementation)) |
6 | @protocol Protocol |
7 | - (void) theBestOfTimes; // expected-note {{method 'theBestOfTimes' declared here}} |
8 | @property (readonly) id theWorstOfTimes; // expected-note {{property declared here}} |
9 | @end |
10 | |
11 | // In this example, ClassA adopts the protocol. We won't |
12 | // provide the implementation here, but this protocol will |
13 | // be adopted later by a subclass. |
14 | @interface ClassA <Protocol> |
15 | - (void) theBestOfTimes; |
16 | @property (readonly) id theWorstOfTimes; // expected-note {{property declared here}} |
17 | @end |
18 | |
19 | // This class subclasses ClassA (which also adopts 'Protocol'). |
20 | @interface ClassB : ClassA <Protocol> |
21 | @end |
22 | |
23 | @implementation ClassB // expected-warning {{property 'theWorstOfTimes' requires method 'theWorstOfTimes' to be defined - use @synthesize, @dynamic or provide a method implementation in this class implementation}} |
24 | @end |
25 | |
26 | @interface ClassB_Good : ClassA <Protocol> |
27 | @end |
28 | |
29 | @implementation ClassB_Good // no-warning |
30 | - (void) theBestOfTimes {} |
31 | @dynamic theWorstOfTimes; |
32 | @end |
33 | |
34 | @interface ClassB_AlsoGood : ClassA <Protocol> |
35 | @property (readonly) id theWorstOfTimes; // expected-warning {{auto property synthesis will not synthesize property 'theWorstOfTimes'; it will be implemented by its superclass}} |
36 | @end |
37 | |
38 | // Default synthesis acts as if @dynamic |
39 | // had been written for 'theWorstOfTimes' because |
40 | // it is declared in ClassA. This is okay, since |
41 | // the author of ClassB_AlsoGood needs explicitly |
42 | // write @property in the @interface. |
43 | @implementation ClassB_AlsoGood // expected-note {{detected while default synthesizing properties in class implementation}} |
44 | - (void) theBestOfTimes {} |
45 | @end |
46 | |
47 | // Test that inherited protocols do not get the explicit conformance requirement. |
48 | @protocol Inherited |
49 | - (void) fairIsFoul; |
50 | @end |
51 | |
52 | __attribute__((objc_protocol_requires_explicit_implementation)) |
53 | @protocol Derived <Inherited> |
54 | - (void) foulIsFair; // expected-note {{method 'foulIsFair' declared here}} |
55 | @end |
56 | |
57 | @interface ClassC <Inherited> |
58 | @end |
59 | |
60 | @interface ClassD : ClassC <Derived> |
61 | @end |
62 | |
63 | @implementation ClassD // expected-warning {{method 'foulIsFair' in protocol 'Derived' not implemented}} |
64 | @end |
65 | |
66 | // Test that the attribute is used correctly. |
67 | __attribute__((objc_protocol_requires_explicit_implementation(1+2))) // expected-error {{attribute takes no arguments}} |
68 | @protocol AnotherProtocol @end |
69 | |
70 | // Cannot put the attribute on classes or other non-protocol declarations. |
71 | __attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}} |
72 | @interface AnotherClass @end |
73 | |
74 | __attribute__((objc_protocol_requires_explicit_implementation)) // expected-error {{attribute only applies to Objective-C protocols}} |
75 | int x; |
76 | |
77 | // Test that inherited protocols with the attribute |
78 | // are treated properly. |
79 | __attribute__((objc_protocol_requires_explicit_implementation)) |
80 | @protocol ProtocolA |
81 | @required |
82 | - (void)rlyeh; // expected-note 2 {{method 'rlyeh' declared here}} |
83 | - (void)innsmouth; // expected-note 2 {{method 'innsmouth' declared here}} |
84 | @end |
85 | |
86 | @protocol ProtocolB <ProtocolA> |
87 | @required |
88 | - (void)dunwich; |
89 | - (void)innsmouth; // expected-note {{method 'innsmouth' declared here}} |
90 | @end |
91 | |
92 | __attribute__((objc_protocol_requires_explicit_implementation)) |
93 | @protocol ProtocolB_Explicit <ProtocolA> |
94 | @required |
95 | - (void)dunwich; |
96 | - (void)innsmouth; // expected-note 2 {{method 'innsmouth' declared here}} |
97 | @end |
98 | |
99 | @protocol ProtocolC |
100 | @required |
101 | - (void)rlyeh; |
102 | - (void)innsmouth; |
103 | - (void)dunwich; |
104 | @end |
105 | |
106 | @interface MyObject <ProtocolC> @end |
107 | |
108 | // Provide two variants of a base class, one that adopts ProtocolA and |
109 | // one that does not. |
110 | @interface Lovecraft <ProtocolA> @end |
111 | @interface Lovecraft_2 @end |
112 | |
113 | // Provide two variants of a subclass that conform to ProtocolB. One |
114 | // subclasses from a class that conforms to ProtocolA, the other that |
115 | // does not. |
116 | // |
117 | // From those, provide two variants that conformat to ProtocolB_Explicit |
118 | // instead. |
119 | @interface Shoggoth : Lovecraft <ProtocolB> @end |
120 | @interface Shoggoth_2 : Lovecraft_2 <ProtocolB> @end |
121 | @interface Shoggoth_Explicit : Lovecraft <ProtocolB_Explicit> @end |
122 | @interface Shoggoth_2_Explicit : Lovecraft_2 <ProtocolB_Explicit> @end |
123 | |
124 | @implementation MyObject |
125 | - (void)innsmouth {} |
126 | - (void)rlyeh {} |
127 | - (void)dunwich {} |
128 | @end |
129 | |
130 | @implementation Lovecraft |
131 | - (void)innsmouth {} |
132 | - (void)rlyeh {} |
133 | @end |
134 | |
135 | @implementation Shoggoth |
136 | - (void)dunwich {} |
137 | @end |
138 | |
139 | @implementation Shoggoth_2 // expected-warning {{method 'innsmouth' in protocol 'ProtocolB' not implemented}}\ |
140 | // expected-warning {{method 'rlyeh' in protocol 'ProtocolA' not implemented}}\ |
141 | // expected-warning {{'innsmouth' in protocol 'ProtocolA' not implemented}} |
142 | - (void)dunwich {} |
143 | @end |
144 | |
145 | @implementation Shoggoth_Explicit // expected-warning {{method 'innsmouth' in protocol 'ProtocolB_Explicit' not implemented}} |
146 | - (void)dunwich {} |
147 | @end |
148 | |
149 | @implementation Shoggoth_2_Explicit // expected-warning {{method 'innsmouth' in protocol 'ProtocolB_Explicit' not implemented}}\ |
150 | // expected-warning {{method 'rlyeh' in protocol 'ProtocolA' not implemented}}\ |
151 | // expected-warning {{method 'innsmouth' in protocol 'ProtocolA' not implemented}} |
152 | - (void)dunwich {} |
153 | @end |
154 | |
155 | // Categories adopting a protocol with explicit conformance need to implement that protocol. |
156 | @interface Parent |
157 | - (void) theBestOfTimes; |
158 | @property (readonly) id theWorstOfTimes; |
159 | @end |
160 | |
161 | @interface Derived : Parent |
162 | @end |
163 | |
164 | @interface Derived (MyCat) <Protocol> |
165 | @end |
166 | |
167 | @implementation Derived (MyCat) // expected-warning {{method 'theBestOfTimes' in protocol 'Protocol' not implemented}} |
168 | @end |
169 | |
170 | __attribute__((objc_protocol_requires_explicit_implementation)) // expected-error{{attribute 'objc_protocol_requires_explicit_implementation' can only be applied to @protocol definitions, not forward declarations}} |
171 | @protocol NotDefined; |
172 | |
173 | // Another complete hierarchy. |
174 | __attribute__((objc_protocol_requires_explicit_implementation)) |
175 | @protocol Ex2FooBar |
176 | - (void)methodA; |
177 | @end |
178 | |
179 | __attribute__((objc_protocol_requires_explicit_implementation)) |
180 | @protocol Ex2ProtocolA |
181 | - (void)methodB; |
182 | @end |
183 | |
184 | __attribute__((objc_protocol_requires_explicit_implementation)) |
185 | @protocol Ex2ProtocolB <Ex2ProtocolA> |
186 | - (void)methodA; // expected-note {{method 'methodA' declared here}} |
187 | @end |
188 | |
189 | // NOT required |
190 | @protocol Ex2ProtocolC <Ex2ProtocolA> |
191 | - (void)methodB; |
192 | - (void)methodA; |
193 | @end |
194 | |
195 | @interface Ex2ClassA <Ex2ProtocolC, Ex2FooBar> |
196 | @end |
197 | @implementation Ex2ClassA |
198 | - (void)methodB {} |
199 | - (void)methodA {} |
200 | @end |
201 | |
202 | @interface Ex2ClassB : Ex2ClassA <Ex2ProtocolB> |
203 | @end |
204 | |
205 | @implementation Ex2ClassB // expected-warning {{method 'methodA' in protocol 'Ex2ProtocolB' not implemented}} |
206 | @end |
207 | |
208 | |