ZIO learning - assembling a program from smaller parts / published by https://github.com/dacr/code-examples-manager #2d08f6f7-e52b-4d5b-bdcc-7f21fb690dd8/5b79f1be2683230380c903e90271bf9089e6446d

zio-learning-3-chaining.sc

// summary : ZIO learning - assembling a program from smaller parts
// keywords : scala, zio, learning, pure-functional, @testable
// publish : gist
// authors : David Crosson
// license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
// id : 2d08f6f7-e52b-4d5b-bdcc-7f21fb690dd8
// created-on : 2021-03-27T17:52:36+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.4.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "fr.janalyse::zio-worksheet:2.0.13.0"
// ---------------------

import zio.*, zio.ZIO.*, zio.worksheet.*

// Task[Int] is a type alias for ZIO[Any, Throwable, Int]
val computeLogic: Task[Int] = for {
  a <- succeed(10)
  b <- succeed(11)
  c <- succeed(a + b)
} yield c

def doubleLogic(x: Int): Task[Int] = succeed(x * 2)

val computeAndOutputLogic: Task[Unit] = for {
  a <- computeLogic
  b <- doubleLogic(a)
  _ <- Console.printLine(s"value=$b")
} yield ()

// -------------------------------------------------------------
computeAndOutputLogic.unsafeRun