คลาสภายในฟังก์ชัน

fun main() {
    class Greeting(val text: String) {
        fun show() = println(text)
    }
    Greeting("Hello local").show()
}

fun build(): String {
    class Builder {
        fun make() = "built"
    }
    return Builder().make()
}

fun main() {
    println(build())
}

fun main() {
    val prefix = ">> "
    class Logger {
        fun log(msg: String) = println(prefix + msg)
    }
    Logger().log("started")
}

fun main() {
    class Point(val x: Int)
    val a = Point(1)
    val b = Point(2)
    println(a.x + b.x)
}

fun main() {
    class Account(var balance: Int) {
        fun deposit(n: Int) { balance += n }
    }
    val acc = Account(100)
    acc.deposit(50)
    println(acc.balance)
}

fun parseLine(line: String): Int {
    class Token(val value: String)
    val tokens = line.split(",").map { Token(it) }
    return tokens.size
}

fun main() {
    println(parseLine("a,b,c"))
}

fun main() {
    var total = 0
    class Adder {
        fun add(n: Int) { total += n }
    }
    val a = Adder()
    a.add(5)
    a.add(7)
    println(total)
}

interface Step { fun run(): String }

fun main() {
    class First : Step {
        override fun run() = "first"
    }
    println(First().run())
}

fun main() {
    class Repeater(val times: Int) {
        fun run() = "x".repeat(times)
    }
    println(Repeater(3).run())
}

fun main() {
    for (i in 1..2) {
        class Tag(val id: Int)
        println(Tag(i).id)
    }
}

fun report(values: List<Int>): String {
    class Stats(val sum: Int, val max: Int)
    val s = Stats(values.sum(), values.max())
    return "sum=${s.sum} max=${s.max}"
}

fun main() {
    println(report(listOf(3, 7, 2)))
}

fun main() {
    val tag = "L"
    class C { fun show() = tag }
    println(C().show())
}