Can't I access outer class var from inner singleton?-CodePudding

New to Kotlin and way rusty on Java but I am trying to accomplish the instantiation of a inner Singleton object which uses a outer class variable to construct:

class Foo(inpoint: String) {
    val point: Path
    val bar: Bar
    object Bar {
        val content: String
        init {
            content = point.toFile().readText()
        }
    }
    init {
        point = Paths.get(inpoint)
        bar = Bar
    }
}

I get an error on the Singleton Bar init trying to get the Foo point (Path)

CodePudding user response：

Here point is a member variable of class Foo. Every object of this class will have its own copy of this variable. So it can only be accessed from an object of this class.

Bar on the other hand is a static class. It belongs to class Foo and not to an object of Foo.

If you want to access point inside Bar, you will have to put it inside Bar definition but then you will only have one copy of point throughout the program.

object Bar {
    private lateinit var point: Path
    private lateinit var content: String

    fun setPoint(inpoint: String) {
        point = Paths.get(inpoint)
        content = point.toFile().readText()
    }
}