| /* |
| * Copyright 2016-2017 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // This file was automatically generated from coroutines-guide.md by Knit tool. Do not edit. |
| package kotlinx.coroutines.experimental.guide.channel04 |
| |
| import kotlinx.coroutines.experimental.* |
| import kotlinx.coroutines.experimental.channels.* |
| |
| fun produceNumbers() = produce<Int> { |
| var x = 1 |
| while (true) send(x++) // infinite stream of integers starting from 1 |
| } |
| |
| fun square(numbers: ReceiveChannel<Int>) = produce<Int> { |
| for (x in numbers) send(x * x) |
| } |
| |
| fun main(args: Array<String>) = runBlocking<Unit> { |
| 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 |
| squares.cancel() // need to cancel these coroutines in a larger app |
| numbers.cancel() |
| } |