Igor Laevsky
38 lines
933 B
Kotlin
Vendored
38 lines
933 B
Kotlin
Vendored
// !LANGUAGE: +UnrestrictedBuilderInference
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// WITH_RUNTIME
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import kotlin.experimental.ExperimentalTypeInference
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@OptIn(ExperimentalTypeInference::class)
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fun <T> flow(@BuilderInference block: suspend FlowCollector<T>.() -> Unit) = Flow<T>()
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@OptIn(ExperimentalTypeInference::class)
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fun <E> produce(@BuilderInference block: suspend SendChannel<E>.() -> Unit) {}
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interface SendChannel<in E> {
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val onSend: SelectClause2<E, SendChannel<E>>
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}
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interface SelectClause2<in P, out Q>
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class Flow<out T>
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interface FlowCollector<in T>
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interface SelectBuilder<in R> {
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operator fun <P, Q> SelectClause2<P, Q>.invoke(param: P, block: suspend (Q) -> R)
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}
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inline fun <R> select(crossinline builder: SelectBuilder<R>.() -> Unit) = Unit as R
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fun box(): String {
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val x: Flow<String> = flow {
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produce {
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select<Unit> {
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onSend("") {
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}
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}
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}
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}
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return "OK"
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}
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