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
|
// RUN: %target-typecheck-verify-swift -swift-version 5
// These are all legal uses of '!'.
struct Fine {
var value: Int!
func m(_ unnamed: Int!, named: Int!) -> Int! { return unnamed }
static func s(_ unnamed: Int!, named: Int!) -> Int! { return named }
init(_ value: Int) { self.value = value }
init!() { return nil }
subscript (
index: Int!
) -> Int! {
return index
}
subscript<T> (
index: T!
) -> T! {
return index
}
}
let _: ImplicitlyUnwrappedOptional<Int> = 1 // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{8-35=Optional}}
let _: ImplicitlyUnwrappedOptional = 1 // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}
extension ImplicitlyUnwrappedOptional {} // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}
func functionSpelling(
_: ImplicitlyUnwrappedOptional<Int> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{6-33=Optional}}
) -> ImplicitlyUnwrappedOptional<Int> { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{6-33=Optional}}
return 1
}
// Okay, like in the method case.
func functionSigil(
_: Int!
) -> Int! {
return 1
}
// Not okay because '!' is not at the top level of the type.
func functionSigilArray(
_: [Int!] // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{10-11=?}}
) -> [Int!] { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{10-11=?}}
return [1]
}
func genericFunction<T>(
iuo: ImplicitlyUnwrappedOptional<T> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{8-35=Optional}}
) -> ImplicitlyUnwrappedOptional<T> { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{6-33=Optional}}
return iuo
}
// Okay, like in the non-generic case.
func genericFunctionSigil<T>(
iuo: T!
) -> T! {
return iuo
}
func genericFunctionSigilArray<T>(
iuo: [T!] // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{10-11=?}}
) -> [T!] { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{8-9=?}}
return iuo
}
protocol P {
associatedtype T
associatedtype U
}
struct S : P {
typealias T = ImplicitlyUnwrappedOptional<Int> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{17-44=Optional}}
typealias U = Optional<ImplicitlyUnwrappedOptional<Int>> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{26-53=Optional}}
typealias V = Int! // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{20-21=?}}
typealias W = Int!? // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{20-21=?}}
var x: V
var y: W
var fn1: (Int!) -> Int // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{16-17=?}}
var fn2: (Int) -> Int! // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{24-25=?}}
subscript (
index: ImplicitlyUnwrappedOptional<Int> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{12-39=Optional}}
) -> ImplicitlyUnwrappedOptional<Int> { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{12-39=Optional}}
return index
}
subscript<T> (
index: ImplicitlyUnwrappedOptional<T> // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{12-39=Optional}}
) -> ImplicitlyUnwrappedOptional<T> { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{12-39=Optional}}
return index
}
}
func generic<T : P>(_: T) where T.T == ImplicitlyUnwrappedOptional<Int> { } // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{40-67=Optional}}
func genericOptIUO<T : P>(_: T) where T.U == Optional<ImplicitlyUnwrappedOptional<Int>> {} // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{55-82=Optional}}
func testClosure() -> Int {
return {
(i: ImplicitlyUnwrappedOptional<Int>) // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{9-36=Optional}}
-> ImplicitlyUnwrappedOptional<Int> in // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{9-36=Optional}}
return i
}(1)!
}
_ = Array<Int!>() // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{14-15=?}}
let _: Array<Int!> = [1] // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{17-18=?}}
_ = [Int!]() // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{9-10=?}}
let _: [Int!] = [1] // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{12-13=?}}
_ = Optional<Int!>(nil) // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{17-18=?}}
let _: Optional<Int!> = nil // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{20-21=?}}
_ = Int!?(0) // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{8-9=?}}
let _: Int!? = 0 // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{11-12=?}}
_ = (
Int!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{6-7=?}}
Float!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{8-9=?}}
String! // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{9-10=?}}
)(1, 2.0, "3")
let _: (
Int!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{6-7=?}}
Float!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{8-9=?}}
String! // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{9-10=?}}
) = (1, 2.0, "3")
struct Generic<T, U, C> {
init(_ t: T, _ u: U, _ c: C) {}
}
_ = Generic<Int!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{16-17=?}}
Float!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{18-19=?}}
String!>(1, 2.0, "3") // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{19-20=?}}
let _: Generic<Int!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{19-20=?}}
Float!, // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{21-22=?}}
String!> = Generic(1, 2.0, "3") // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{22-23=?}}
func vararg(_ first: Int, more: Int!...) { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{36-37=?}}
}
func varargIdentifier(_ first: Int, more: ImplicitlyUnwrappedOptional<Int>...) { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{43-70=Optional}}
}
func iuoInTuple() -> (Int!) { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{26-27=?}}
return 1
}
func iuoInTupleIdentifier() -> (ImplicitlyUnwrappedOptional<Int>) { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{33-60=Optional}}
return 1
}
func iuoInTuple2() -> (Float, Int!) { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{34-35=?}}
return (1.0, 1)
}
func iuoInTuple2Identifier() -> (Float, ImplicitlyUnwrappedOptional<Int>) { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{41-68=Optional}}
return (1.0, 1)
}
func takesFunc(_ fn: (Int!) -> Int) -> Int { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{26-27=?}}
return fn(0)
}
func takesFuncIdentifier(_ fn: (ImplicitlyUnwrappedOptional<Int>) -> Int) -> Int { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{33-60=Optional}}
return fn(0)
}
func takesFunc2(_ fn: (Int) -> Int!) -> Int { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{35-36=?}}
return fn(0)!
}
func takesFunc2Identifier(_ fn: (Int) -> ImplicitlyUnwrappedOptional<Int>) -> Int { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{42-69=Optional}}
return fn(0)!
}
func returnsFunc() -> (Int!) -> Int { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{27-28=?}}
return { $0! }
}
func returnsFuncIdentifier() -> (ImplicitlyUnwrappedOptional<Int>) -> Int { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{34-61=Optional}}
return { $0! }
}
func returnsFunc2() -> (Int) -> Int! { // expected-error {{'!' is not allowed here; perhaps '?' was intended?}}{{36-37=?}}
return { $0 }
}
func returnsFunc2Identifier() -> (Int) -> ImplicitlyUnwrappedOptional<Int> { // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{43-70=Optional}}
return { $0 }
}
let x0 = 1 as ImplicitlyUnwrappedOptional // expected-error {{'ImplicitlyUnwrappedOptional' has been renamed to 'Optional'}}{{15-42=Optional}}
let x: Int? = 1
let y0: Int = x as Int! // expected-error {{using '!' is not allowed here; perhaps '?' was intended?}}{{23-24=?}}
let y1: Int = (x as Int!)! // expected-error {{using '!' is not allowed here; perhaps '?' was intended?}}{{24-25=?}}
let z0: Int = x as! Int! // expected-error {{using '!' is not allowed here; perhaps '?' was intended?}}{{24-25=?}}
// expected-warning@-1 {{forced cast from 'Int?' to 'Int' only unwraps optionals; did you mean to use '!'?}}
let z1: Int = (x as! Int!)! // expected-error {{using '!' is not allowed here; perhaps '?' was intended?}}{{25-26=?}}
// expected-warning@-1 {{forced cast from 'Int?' to 'Int' only unwraps optionals; did you mean to use '!'?}}
let w0: Int = (x as? Int!)! // expected-warning {{conditional cast from 'Int?' to 'Int?' always succeeds}}
// expected-error@-1 {{using '!' is not allowed here; perhaps '?' was intended?}}{{25-26=?}}
let w1: Int = (x as? Int!)!! // expected-warning {{conditional cast from 'Int?' to 'Int?' always succeeds}}
// expected-error@-1 {{using '!' is not allowed here; perhaps '?' was intended?}}{{25-26=?}}
func overloadedByOptionality(_ a: inout Int!) {}
// expected-note@-1 {{'overloadedByOptionality' previously declared here}}
func overloadedByOptionality(_ a: inout Int?) {}
// expected-error@-1 {{invalid redeclaration of 'overloadedByOptionality'}}
// expected-note@-2 {{optional parameter is of same type as implicitly unwrapped optional parameter}}
struct T {
let i: Int!
var j: Int!
let k: Int
}
func select(i: Int!, m: Int, t: T) {
let _ = i ? i : m // expected-error {{optional type 'Int?' cannot be used as a boolean; test for '!= nil' instead}} {{11-11=(}} {{12-12= != nil)}}
let _ = t.i ? t.j : t.k // expected-error {{optional type 'Int?' cannot be used as a boolean; test for '!= nil' instead}} {{11-11=(}} {{14-14= != nil)}}
}
|
