| /* |
| * Copyright 2016-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license. |
| */ |
| |
| // This file was automatically generated from channels.md by Knit tool. Do not edit. |
| package kotlinx.coroutines.guide.exampleChannel04 |
| |
| import kotlinx.coroutines.* |
| import kotlinx.coroutines.channels.* |
| |
| fun main() = runBlocking { |
| val numbers = produceNumbers() // produces integers from 1 and on |
| val squares = square(numbers) // squares integers |
| repeat(5) { |
| println(squares.receive()) // print first five |
| } |
| println("Done!") // we are done |
| coroutineContext.cancelChildren() // cancel children coroutines |
| } |
| |
| 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) |
| } |