How can you check, if a class has an initializer for a lateinit variable, when this class is passed ...

# getting-started

[hfhbd]

How can you check, if a class has an initializer for a lateinit variable, when this class is passed as variable to another class?

class Config {
    lateinit var s: String
}
class Consumer(val config: Config) {
    init {
         require(config::s.isInitialized)
    }
}

My current workaround is using an internal member function: fun isInitialized() = ::s.isInitialized and call this function in require.

[Arxing Lin]

class Config(var s: String)

can ensure that s must have a value

[Arxing Lin]

or use Delegates.notNull<T>() more elegantly

class Config {
  var s: String by Delegates.notNull()
}

[Mendess]

@Arxing Lin what is the point of Delegates.notNull? How is it different from lateinit var?