ZIO learning - defining and injecting a custom very basic layer into the environment / published by https://github.com/dacr/code-examples-manager #2e6b18e2-4971-407d-8556-3a62a0aaf218/d3dc733b1b7e532c4d46950509701e55ce9a8b5e

zio-learning-4-env-3-custom-1.sc

// summary : ZIO learning - defining and injecting a custom very basic layer into the environment
// 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 : 2e6b18e2-4971-407d-8556-3a62a0aaf218
// created-on : 2021-03-27T08:57:03+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.worksheet.*

val logic: ZIO[String, Exception, Unit] = for {
  env <- ZIO.environment[String]
  name = env.get
  _   <- Console.printLine(s"Hello $name !")
} yield ()

// -------------------------------------------------------------
logic.provideLayer(ZLayer.succeed("world")).unsafeRun