小编has*_*adv的帖子

我开始尝试 ZIO，并尝试运行以下高度复杂的程序：

import logger.{Logger, _}
import zio.console._
import zio.{system, _}

object MyApp extends App {

  override def run(args: List[String]): ZIO[ZEnv, Nothing, Int] = {

    app
      .provideSome[Logger](_ => Slf4jLogger.create) //1 
      .fold(_ => 1, _ => 0)
  }

  val app: ZIO[Console with system.System with Logger, SecurityException, Unit] =
    for {
      _         <- info("This message from the logger") //2
      maybeUser <- system.env("USER")
      _         <- maybeUser match {
                      case Some(userName) => putStrLn(s"Hello ${userName}!")
                      case None => putStrLn("I don't know your name")
                    }
    } yield …