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
|
// RUN: %target-swift-frontend -parse-as-library -emit-sil -verify %s
// REQUIRES: concurrency
@available(SwiftStdlib 5.1, *)
struct Kappa {
var maybeData: Int? {
get async { 12 }
}
func take() -> Int? { // expected-note 3{{add 'async' to function 'take()' to make it asynchronous}}
if let data = maybeData { // expected-error{{'async' property access in a function that does not support concurrency}}
return data
}
let x = maybeData // expected-error{{'async' property access in a function that does not support concurrency}}
_ = x
if let maybeData { // expected-error{{'async' property access in a function that does not support concurrency}}
return maybeData
}
return nil
}
func takeAsync() async -> Int? {
if let data = maybeData { // expected-error{{expression is 'async' but is not marked with 'await'}}
// expected-note@-1{{property access is 'async'}}
return data
}
let x = maybeData // expected-error{{expression is 'async' but is not marked with 'await'}}
// expected-note@-1{{property access is 'async'}}
_ = x
if let maybeData { // expected-error{{expression is 'async' but is not marked with 'await'}}
// expected-note@-1{{property access is 'async'}}
return maybeData
}
return nil
}
func illegalSyntax() async -> Int? {
// This is NOT valid syntax and we reject it properly,
// though we could try to could give a better message
if let await maybeData { // expected-error{{unwrap condition requires a valid identifier}}
// expected-error@-1{{pattern variable binding cannot appear in an expression}}
// expected-warning@-2{{no 'async' operations occur within 'await' expression}}
return maybeData // expected-error{{expression is 'async' but is not marked with 'await'}}
// expected-note@-1{{property access is 'async'}}
}
}
}
|
