1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
|
// RUN: %target-typecheck-verify-swift
// Protocols with superclass-constrained Self.
class Concrete {
typealias ConcreteAlias = String
func concreteMethod(_: ConcreteAlias) {}
}
class Generic<T> : Concrete { // expected-note 6 {{arguments to generic parameter 'T' ('Int' and 'String') are expected to be equal}}
typealias GenericAlias = (T, T)
func genericMethod(_: GenericAlias) {}
}
protocol BaseProto {}
protocol ProtoRefinesClass where Self : Generic<Int>, Self : BaseProto {
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias)
// expected-note@-1 {{protocol requires function 'requirementUsesClassTypes' with type '(Generic<Int>.ConcreteAlias, Generic<Int>.GenericAlias) -> ()' (aka '(String, (Int, Int)) -> ()')}}
}
func duplicateOverload<T : ProtoRefinesClass>(_: T) {}
// expected-note@-1 {{'duplicateOverload' previously declared here}}
func duplicateOverload<T : ProtoRefinesClass & Generic<Int>>(_: T) {}
// expected-error@-1 {{invalid redeclaration of 'duplicateOverload'}}
extension ProtoRefinesClass {
func extensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
let _: Generic<Int> = self
let _: Concrete = self
let _: BaseProto = self
let _: BaseProto & Generic<Int> = self
let _: BaseProto & Concrete = self
let _: Generic<String> = self
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
}
func usesProtoRefinesClass1(_ t: ProtoRefinesClass) {
let x: ProtoRefinesClass.ConcreteAlias = "hi"
_ = ProtoRefinesClass.ConcreteAlias.self
t.concreteMethod(x)
let y: ProtoRefinesClass.GenericAlias = (1, 2)
_ = ProtoRefinesClass.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
func usesProtoRefinesClass2<T : ProtoRefinesClass>(_ t: T) {
let x: T.ConcreteAlias = "hi"
_ = T.ConcreteAlias.self
t.concreteMethod(x)
let y: T.GenericAlias = (1, 2)
_ = T.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
class BadConformingClass1 : ProtoRefinesClass {
// expected-error@-1 {{type 'BadConformingClass1' does not conform to protocol 'ProtoRefinesClass'}}
// expected-error@-2 {{'ProtoRefinesClass' requires that 'BadConformingClass1' inherit from 'Generic<Int>'}}
// expected-note@-3 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass1]}}
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
// expected-error@-1 {{cannot find type 'ConcreteAlias' in scope}}
// expected-error@-2 {{cannot find type 'GenericAlias' in scope}}
_ = ConcreteAlias.self
// expected-error@-1 {{cannot find 'ConcreteAlias' in scope}}
_ = GenericAlias.self
// expected-error@-1 {{cannot find 'GenericAlias' in scope}}
}
}
class BadConformingClass2 : Generic<String>, ProtoRefinesClass {
// expected-error@-1 {{'ProtoRefinesClass' requires that 'BadConformingClass2' inherit from 'Generic<Int>'}}
// expected-note@-2 {{requirement specified as 'Self' : 'Generic<Int>' [with Self = BadConformingClass2]}}
// expected-error@-3 {{type 'BadConformingClass2' does not conform to protocol 'ProtoRefinesClass'}}
// expected-note@-4 {{add stubs for conformance}}
// expected-note@+1 {{candidate has non-matching type '(BadConformingClass2.ConcreteAlias, BadConformingClass2.GenericAlias) -> ()' (aka '(String, (String, String)) -> ()')}}
func requirementUsesClassTypes(_: ConcreteAlias, _: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
}
}
class GoodConformingClass : Generic<Int>, ProtoRefinesClass {
func requirementUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
}
}
protocol ProtoRefinesProtoWithClass where Self : ProtoRefinesClass {}
extension ProtoRefinesProtoWithClass {
func anotherExtensionMethodUsesClassTypes(_ x: ConcreteAlias, _ y: GenericAlias) {
_ = ConcreteAlias.self
_ = GenericAlias.self
concreteMethod(x)
genericMethod(y)
let _: Generic<Int> = self
let _: Concrete = self
let _: BaseProto = self
let _: BaseProto & Generic<Int> = self
let _: BaseProto & Concrete = self
let _: Generic<String> = self
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
}
func usesProtoRefinesProtoWithClass1(_ t: ProtoRefinesProtoWithClass) {
let x: ProtoRefinesProtoWithClass.ConcreteAlias = "hi"
_ = ProtoRefinesProtoWithClass.ConcreteAlias.self
t.concreteMethod(x)
let y: ProtoRefinesProtoWithClass.GenericAlias = (1, 2)
_ = ProtoRefinesProtoWithClass.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
func usesProtoRefinesProtoWithClass2<T : ProtoRefinesProtoWithClass>(_ t: T) {
let x: T.ConcreteAlias = "hi"
_ = T.ConcreteAlias.self
t.concreteMethod(x)
let y: T.GenericAlias = (1, 2)
_ = T.GenericAlias.self
t.genericMethod(y)
t.requirementUsesClassTypes(x, y)
let _: Generic<Int> = t
let _: Concrete = t
let _: BaseProto = t
let _: BaseProto & Generic<Int> = t
let _: BaseProto & Concrete = t
let _: Generic<String> = t
// expected-error@-1 {{cannot assign value of type 'Generic<Int>' to type 'Generic<String>'}}
}
class ClassWithInits<T> {
init(notRequiredInit: ()) {}
// expected-note@-1 6{{selected non-required initializer 'init(notRequiredInit:)'}}
required init(requiredInit: ()) {}
}
protocol ProtocolWithClassInits where Self : ClassWithInits<Int> {}
func useProtocolWithClassInits1() {
_ = ProtocolWithClassInits(notRequiredInit: ())
// expected-error@-1 {{type 'any ProtocolWithClassInits' cannot be instantiated}}
_ = ProtocolWithClassInits(requiredInit: ())
// expected-error@-1 {{type 'any ProtocolWithClassInits' cannot be instantiated}}
}
func useProtocolWithClassInits2(_ t: ProtocolWithClassInits.Type) {
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'any ProtocolWithClassInits' with a metatype value must use a 'required' initializer}}
let _: ProtocolWithClassInits = t.init(requiredInit: ())
}
func useProtocolWithClassInits3<T : ProtocolWithClassInits>(_ t: T.Type) {
_ = T(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = T(requiredInit: ())
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = t.init(requiredInit: ())
}
protocol ProtocolRefinesClassInits : ProtocolWithClassInits {}
func useProtocolRefinesClassInits1() {
_ = ProtocolRefinesClassInits(notRequiredInit: ())
// expected-error@-1 {{type 'any ProtocolRefinesClassInits' cannot be instantiated}}
_ = ProtocolRefinesClassInits(requiredInit: ())
// expected-error@-1 {{type 'any ProtocolRefinesClassInits' cannot be instantiated}}
}
func useProtocolRefinesClassInits2(_ t: ProtocolRefinesClassInits.Type) {
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'any ProtocolRefinesClassInits' with a metatype value must use a 'required' initializer}}
let _: ProtocolRefinesClassInits = t.init(requiredInit: ())
}
func useProtocolRefinesClassInits3<T : ProtocolRefinesClassInits>(_ t: T.Type) {
_ = T(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = T(requiredInit: ())
_ = t.init(notRequiredInit: ())
// expected-error@-1 {{constructing an object of class type 'T' with a metatype value must use a 'required' initializer}}
let _: T = t.init(requiredInit: ())
}
// Make sure that we don't require 'mutating' when the protocol has a superclass
// constraint.
protocol HasMutableProperty : Concrete {
var mutableThingy: Any? { get set }
}
extension HasMutableProperty {
func mutateThingy() {
mutableThingy = nil
}
}
// Some pathological examples -- just make sure they don't crash.
protocol RecursiveSelf where Self : Generic<Self> {}
protocol RecursiveAssociatedType where Self : Generic<Self.X> {
associatedtype X
}
protocol BaseProtocol {
typealias T = Int
}
class BaseClass : BaseProtocol {}
protocol RefinedProtocol where Self : BaseClass {
func takesT(_: T)
}
class RefinedClass : BaseClass, RefinedProtocol {
func takesT(_: T) {
_ = T.self
}
}
func takesBaseProtocol(_: BaseProtocol) {}
func passesRefinedProtocol(_ r: RefinedProtocol) {
takesBaseProtocol(r)
}
class LoopClass : LoopProto {}
protocol LoopProto where Self : LoopClass {}
class FirstClass {}
protocol FirstProtocol where Self : FirstClass {}
class SecondClass : FirstClass {}
protocol SecondProtocol where Self : SecondClass, Self : FirstProtocol {}
class FirstConformer : FirstClass, SecondProtocol {}
// expected-error@-1 {{type 'FirstConformer' does not conform to protocol 'SecondProtocol'}}
// expected-error@-2 {{'SecondProtocol' requires that 'FirstConformer' inherit from 'SecondClass'}}
// expected-note@-3 {{requirement specified as 'Self' : 'SecondClass' [with Self = FirstConformer]}}
class SecondConformer : SecondClass, SecondProtocol {}
// Duplicate superclass
// FIXME: Should be an error here too
protocol DuplicateSuper1 : Concrete where Self : Concrete {}
protocol DuplicateSuper2 where Self : Concrete, Self : Concrete {}
// Ambiguous name lookup situation
protocol Amb where Self : Concrete {}
// expected-note@-1 {{'Amb' previously declared here}}
// expected-note@-2 {{found this candidate}}
protocol Amb where Self : Concrete {}
// expected-error@-1 {{invalid redeclaration of 'Amb'}}
// expected-note@-2 {{found this candidate}}
extension Amb { // expected-error {{'Amb' is ambiguous for type lookup in this context}}
func extensionMethodUsesClassTypes() {
_ = ConcreteAlias.self
}
}
|
