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`finally` clause in Kotlin just like `defer` in Go

// ExceptionHandling/GuaranteedCleanup.kt

package exceptionhandling

import atomictest.eq



data class Switch(

  var on: Boolean = false,

  var result: String = "OK"

)



fun testFinally(i: Int): Switch {

  val sw = Switch()

  try {

    sw.on = true

    when (i) {

      0 -> throw IllegalStateException()

      1 -> return sw                 // [1]

    }

  } catch (e: IllegalStateException) {

    sw.result = "exception"

  } finally {

    sw.on = false

  }

  return sw

}



fun main() {

  testFinally(0) eq

    "Switch(on=false, result=exception)"

  testFinally(1) eq

    "Switch(on=false, result=OK)"    // [2]

  testFinally(2) eq

    "Switch(on=false, result=OK)"

}