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// RUN: %empty-directory(%t)
// RUN: %target-swift-frontend -enable-experimental-feature Embedded -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
func fib(_ n: Int) -> Int {
var first = 0
var second = 1
for _ in 0..<n {
let temp = first
first = second
second = temp + first
}
return first
}
@available(SwiftStdlib 5.1, *)
func asyncFib(_ n: Int) async -> Int {
if n == 0 || n == 1 {
return n
}
async let first = await asyncFib(n-2)
async let second = await asyncFib(n-1)
let result = await first + second
return result
}
@available(SwiftStdlib 5.1, *)
func runFibonacci(_ n: Int) async {
let result = await asyncFib(n)
print("")
print(result == fib(n) ? "OK!" : "???")
// CHECK: OK!
}
@available(SwiftStdlib 5.1, *)
@main struct Main {
static func main() async {
await runFibonacci(10)
}
}
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