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/*
* Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
// This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit.
package kotlinx.coroutines.guide.select02
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.*
import kotlinx.coroutines.selects.*
suspend fun selectAorB(a: ReceiveChannel<String>, b: ReceiveChannel<String>): String =
select<String> {
a.onReceiveOrNull { value ->
if (value == null)
"Channel 'a' is closed"
else
"a -> '$value'"
}
b.onReceiveOrNull { value ->
if (value == null)
"Channel 'b' is closed"
else
"b -> '$value'"
}
}
fun main() = runBlocking<Unit> {
val a = produce<String> {
repeat(4) { send("Hello $it") }
}
val b = produce<String> {
repeat(4) { send("World $it") }
}
repeat(8) { // print first eight results
println(selectAorB(a, b))
}
coroutineContext.cancelChildren()
}
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