arrow-fx-coroutines / arrow.fx.coroutines / Use

Use

inline class Use<A>

Marker for suspend () -> A to be marked as the Use action of a Resource. Offers a convenient DSL to use Resource for simple resources.

import arrow.fx.coroutines.*

class File(url: String) {
  suspend fun open(): File = this
  suspend fun close(): Unit {}
  override fun toString(): String = "This file contains some interesting content!"
}

suspend fun openFile(uri: String): File = File(uri).open()
suspend fun closeFile(file: File): Unit = file.close()
suspend fun fileToString(file: File): String = file.toString()

suspend fun main(): Unit {
  val res = resource {
    openFile("data.json")
  } release { file ->
    closeFile(file)
  } use { file ->
    fileToString(file)
  }

  println(res)
}

Constructors

<init> Marker for suspend () -> A to be marked as the Use action of a Resource. Offers a convenient DSL to use Resource for simple resources.Use(acquire: suspend () -> A)

Extension Functions

release	Composes a release action to a Resource.use action creating a Resource.`infix fun <A>` `Use<A>.release(release: suspend (A) ->` `Unit):` `Resource<A>`
releaseCase	Composes a releaseCase action to a Resource.use action creating a Resource.`infix fun <A>` `Use<A>.releaseCase(release: suspend (A,` `ExitCase) ->` `Unit):` `Resource<A>`