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
|
// RUN: %target-run-simple-swift( -Xfrontend -disable-availability-checking -parse-as-library) | %FileCheck %s
// REQUIRES: executable_test
// REQUIRES: concurrency
// REQUIRES: reflection
// rdar://76038845
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
struct Boom: Error {}
struct IgnoredBoom: Error {}
@available(SwiftStdlib 5.1, *)
func one() async -> Int { 1 }
@available(SwiftStdlib 5.1, *)
func boom() async throws -> Int {
throw Boom()
}
@available(SwiftStdlib 5.1, *)
func test_taskGroup_throws() async {
let got: Int = try await withThrowingTaskGroup(of: Int.self) { group in
group.addTask { try await boom() }
do {
while let r = try await group.next() {
print("next: \(r)")
}
} catch {
print("error caught in group: \(error)")
let gc = group.isCancelled
print("group cancelled: \(gc)")
group.addTask { () async -> Int in
let c = Task.isCancelled
print("task 3 (cancelled: \(c))")
return 3
}
switch await group.nextResult() {
case .success(let third):
print("task group returning normally: \(third)")
return third
case .failure(let error):
fatalError("got an erroneous third result: \(error)")
case .none:
print("task group failed to get 3")
return 0
}
}
fatalError("Should have thrown and handled inside the catch block")
}
// CHECK: error caught in group: Boom()
// CHECK: group cancelled: false
// CHECK: task 3 (cancelled: false)
// CHECK: task group returning normally: 3
// CHECK: got: 3
print("got: \(got)")
}
@available(SwiftStdlib 5.1, *)
@main struct Main {
static func main() async {
await test_taskGroup_throws()
}
}
|
