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// RUN: %empty-directory(%t)
// RUN: %target-build-swift -Xfrontend -disable-availability-checking %s -parse-as-library -module-name main -o %t/main
// RUN: %target-codesign %t/main
// RUN: %target-run %t/main | %FileCheck %s
// REQUIRES: concurrency
// REQUIRES: executable_test
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
// UNSUPPORTED: OS=windows-msvc
var gg = 0
@inline(never)
public func identity<T>(_ x: T) -> T {
gg += 1
return x
}
actor Actor {
var x: Int = 0
init(x: Int) { self.x = x }
@inline(never)
func get(_ i: Int ) async -> Int {
return i + x
}
}
// Used to crash with an stack overflow with m >= 18
let m = 22
@inline(never)
func asyncFib(_ n: Int, _ a1: Actor, _ a2: Actor) async -> Int {
if n == 0 {
return await a1.get(n)
}
if n == 1 {
return await a2.get(n)
}
let first = await asyncFib(n-2, a1, a2)
let second = await asyncFib(n-1, a1, a2)
let result = first + second
return result
}
@main struct Main {
static func main() async {
let a1 = Actor(x: 0)
let a2 = Actor(x: 0)
_ = await asyncFib(identity(m), a1, a2)
// CHECK: result: 0
await print("result: \(a1.x)");
await print(a2.x)
}
}
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