CheolhoJeon

package chap5.NestedClasses

import atomictest.eq
import chap5.NestedClasses.Game.Mark.*
import chap5.NestedClasses.Game.State.Finished
import chap5.NestedClasses.Game.State.Playing
import kotlin.random.Random

interface Game {
  enum class State { Playing, Finished }

CheolhoJeon

package chap5.NestedClasses

import chap5.NestedClasses.Ticket.Seat.*

class Ticket(
  val name: String,
  val seat: Seat = Coach
) {
  enum class Seat {
    Coach,

CheolhoJeon

package chap5.NestedClasses

import atomictest.eq

interface Item {
  val type: Type

  data class Type(val type: String)
}

CheolhoJeon

package chap5.NestedClasses

interface Amphibian

fun createAmphibian(): Amphibian {
  class Frog : Amphibian
  return Frog()
}

fun main(){

CheolhoJeon

package chap5.NestedClasses

fun localClasses() {
  open class Amphibian
  class Frog : Amphibian()
  val amphibian: Amphibian = Frog()
}

CheolhoJeon

package chap5.NestedClasses

import atomictest.eq

abstract class Cleanable(val id: String) {
  open val parts: List<Cleanable> = listOf()
  fun clean(): String {
    val text = "$id clean"
    if (parts.isEmpty()) return text
    return "${parts.joinToString(

CheolhoJeon

package chap5.NestedClasses

import atomictest.eq
import chap5.NestedClasses.Airport.Plane

class Airport(private val code: String) {
  open class Plane {
    // Can access private properties:
    fun contact(airport: Airport) =
      "Contacting ${airport.code}"

CheolhoJeon

package chap5.TypeCheking.typechecking3

import atomictest.eq
import chap5.TypeCheking.name


interface BeverageContainer {
  fun open(): String
  fun pour() = "$name: Pour"
  fun recycle(): String

CheolhoJeon

package chap5.TypeCheking.typechecking2

import atomictest.eq

sealed class BeverageContainer {
  abstract fun open(): String
  abstract fun pour(): String
}

sealed class Can : BeverageContainer() {

CheolhoJeon

package chap5.TypeCheking.typechecking3

import atomictest.eq
import chap5.TypeCheking.name

sealed class Shape {
  fun draw() = "$name: Draw"
}

class Circle : Shape()