concurrency-discardingtaskgroup.swift

// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -enable-experimental-feature Embedded -target %target-cpu-apple-macos14 -parse-as-library %s -c -o %t/a.o
// RUN: %target-clang %t/a.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%target-cpu-apple-macos -lswift_Concurrency -lswift_ConcurrencyDefaultExecutor -dead_strip
// RUN: %target-run %t/a.out | %FileCheck %s

// REQUIRES: executable_test
// REQUIRES: swift_in_compiler
// REQUIRES: optimized_stdlib
// REQUIRES: OS=macosx
// REQUIRES: swift_feature_Embedded

import _Concurrency

protocolGo:Actor{
varname:String{get}
func go(times:Int)async->Int
}

extensionGo{
func go(times:Int)async->Int{
foriin0..<times {
print("\(name) @ \(i)")
awaitTask.yield()
}
return times
}
}

actorOne:Go{varname="One"}
actorTwo:Go{varname="Two"}

func yielding()async{
letone=One()
lettwo=Two()
awaitwithDiscardingTaskGroup(returning:Void.self){ group in
 group.addTask{
await one.go(times:5)
}
 group.addTask{
await two.go(times:5)
}
}
}

@mainstructMain{
staticfunc main()async{
awaityielding()
print("All done!")
 // CHECK: One @ 0
 // CHECK: Two @ 0
 // CHECK: One @ 1
 // CHECK: Two @ 1
 // CHECK: One @ 2
 // CHECK: Two @ 2
 // CHECK: One @ 3
 // CHECK: Two @ 3
 // CHECK: One @ 4
 // CHECK: Two @ 4
 // CHECK: All done!
}
}