| // WITH_STDLIB |
| // WITH_COROUTINES |
| |
| import kotlin.contracts.* |
| import kotlin.coroutines.* |
| import helpers.* |
| |
| @ExperimentalContracts |
| public fun <T> runBlocking(block: suspend () -> T): T { |
| contract { |
| callsInPlace(block, InvocationKind.EXACTLY_ONCE) |
| } |
| var res: T? = null |
| suspend { |
| res = block() |
| }.startCoroutine(EmptyContinuation) |
| return res!! |
| } |
| |
| sealed class S { |
| class Z : S() { |
| fun f(): String = "OK" |
| } |
| } |
| |
| val z: S = S.Z() |
| |
| @OptIn(ExperimentalContracts::class) |
| fun box(): String = test() |
| |
| @ExperimentalContracts |
| fun test(): String = when (val w = z) { |
| is S.Z -> runBlocking { w.f() } |
| } |
