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/*
* Copyright 2016-2018 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.channel04
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.*
fun main() = runBlocking {
//sampleStart
val numbers = produceNumbers() // produces integers from 1 and on
val squares = square(numbers) // squares integers
for (i in 1..5) println(squares.receive()) // print first five
println("Done!") // we are done
coroutineContext.cancelChildren() // cancel children coroutines
//sampleEnd
}
fun CoroutineScope.produceNumbers() = produce<Int> {
var x = 1
while (true) send(x++) // infinite stream of integers starting from 1
}
fun CoroutineScope.square(numbers: ReceiveChannel<Int>): ReceiveChannel<Int> = produce {
for (x in numbers) send(x * x)
}
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