Scala example source code file (SafeApp.scala)

This example Scala source code file (SafeApp.scala) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Scala by Example" ^TM.

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Java - Scala tags/keywords

array, immutablearray, list, safeapp

The SafeApp.scala Scala example source code

package scalaz
package effect

import IO._

/**
 * A safe alternative to the `App` trait in the Scala standard library. This
 * trait provides an implementation of the `main` method by calling
 * `unsafePerformIO` on a specified `IO` action.
 */
trait SafeApp {

  def run(args: ImmutableArray[String]): IO[Unit] = runl(args.toList)

  def runl(args: List[String]): IO[Unit] = runc

  def runc: IO[Unit] = ioUnit

  final def main(args: Array[String]) {
    run(ImmutableArray.fromArray(args)).unsafePerformIO()
  }

}