customDelegateDemo.kt

package demo

import fj.P
import kotlin.properties.ReadOnlyProperty
import kotlin.reflect.KProperty

class FjLazy<in R,T>(init: () -> T) : ReadOnlyProperty<R, T> {

    val initIt = P.hardMemo(init)

    override fun getValue(thisRef: R, property: KProperty<*>): T {
        return initIt._1()
    }

}

fun main(args: Array<String>) {
    val foo: String by FjLazy {
        println("initializing")
        "asdasd"
    }

    println(foo)
    println(foo)


}