mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
44 lines
1.0 KiB
Swift
44 lines
1.0 KiB
Swift
// RUN: %target-run-simple-swift(-Xfrontend -enable-experimental-concurrency) | %FileCheck %s --dump-input always
|
|
// REQUIRES: executable_test
|
|
// REQUIRES: concurrency
|
|
// REQUIRES: OS=macosx
|
|
// REQUIRES: CPU=x86_64
|
|
|
|
import Dispatch
|
|
|
|
#if canImport(Darwin)
|
|
import Darwin
|
|
#elseif canImport(Glibc)
|
|
import Glibc
|
|
#endif
|
|
|
|
func asyncEcho(_ value: Int) async -> Int {
|
|
value
|
|
}
|
|
|
|
func test_taskGroup_isEmpty() async {
|
|
_ = await try! Task.withGroup(resultType: Int.self) { (group) async -> Int in
|
|
// CHECK: before add: isEmpty=true
|
|
print("before add: isEmpty=\(group.isEmpty)")
|
|
|
|
await group.add {
|
|
sleep(2)
|
|
return await asyncEcho(1)
|
|
}
|
|
|
|
// CHECK: while add running, outside: isEmpty=false
|
|
print("while add running, outside: isEmpty=\(group.isEmpty)")
|
|
|
|
// CHECK: next: 1
|
|
while let value = await try! group.next() {
|
|
print("next: \(value)")
|
|
}
|
|
|
|
// CHECK: after draining tasks: isEmpty=true
|
|
print("after draining tasks: isEmpty=\(group.isEmpty)")
|
|
return 0
|
|
}
|
|
}
|
|
|
|
runAsyncAndBlock(test_taskGroup_isEmpty)
|