async_task_cancellation_taskGroup.swift

// RUN: %target-run-simple-swift( -target %target-swift-5.1-abi-triple %import-libdispatch -parse-as-library) | %FileCheck %s --dump-input=always

// REQUIRES: executable_test
// REQUIRES: concurrency
// REQUIRES: libdispatch

// rdar://76038845
// REQUIRES: concurrency_runtime

// rdar://103606995
// UNSUPPORTED: back_deployment_runtime

import Dispatch

@available(SwiftStdlib 5.1,*)
func test_detach_cancel_taskGroup()async{
print(#function) // CHECK: test_detach_cancel_taskGroup

awaitwithTaskGroup(of:Void.self){ group in
 group.cancelAll() // immediately cancel the group
print("group.cancel()") // CHECK: group.cancel()

 group.addTask{
 // immediately cancelled child task...
awaitwithTaskCancellationHandler{
print("child: operation, was cancelled: \(Task.isCancelled)")
} onCancel:{
print("child: onCancel, was cancelled: \(Task.isCancelled)")
}
}
 // CHECK: child: onCancel, was cancelled: true
 // CHECK: child: operation, was cancelled: true
}

print("done") // CHECK: done
}

@available(SwiftStdlib 5.1,*)
@mainstructMain{
staticfunc main()async{
awaittest_detach_cancel_taskGroup()
}
}