I'm trying to have typed Ids, so I created a inter...

# getting-started

[ursus]

I'm trying to have typed Ids, so I created a interface

interface Id : Comparable<Id> {
    val value: String
    
    override fun compareTo(other: Id): Int = value.compareTo(other.value)
    fun toString(): String = value
}

but it complains 'toString' hides member of supertype 'Comparable' and needs 'override' modifier which is nonsense, but if I remove the comparable, then it complains that im hiding Any
is this possible?

[Ayfri]

It is not nonsense but Kotlin wants you to override the toString method, because it is already present in Comparable if I remember correctly

[ursus]

no its not

[Rob Elliot]

You can’t override toString in an interface. Just have to leave it to the implementations of Id.

Or make Id an open class rather than an interface.

[Ayfri]

It's already implemented in Any class, which every Class extends in Kotlin

[Rob Elliot]

open class Id(
  val value: String
) : Comparable<Id> {
  final override fun compareTo(other: Id): Int = value.compareTo(other.value)
  final override fun toString(): String = value
}

[ursus]

yea I figured its impossible, its just that the error messages are bs imo

[Paul Griffith]

typed IDs

An inline class? https://kotlinlang.org/docs/inline-classes.html

[ursus]

Yea but dagger doesnt work with them yet