some sample would help. but if you want to provide some compatibility with outside consumers:

typealias Coordinate2D = Triple<Int, Int, String>
operator fun Coordinate2D.invoke(x: Int, y: Int, description: String) = Coordinate2D(x, y, description)

Your invoke requires a instance to exist already...

what do you mean. it fakes a constructor on a

typealias

to

Triple

of a certain type thats called

Coordinate2D

and gives it named arguments

operator fun Coordinate2D.invoke

works on an instance of

Triple<Int, Int, String>

, so it would be used like so:

val tri = Triple(5, 6, "test")
val coord = tri(7, 8, "test-2")

I think you want

fun Coordinate2D(x: Int, y: Int, description: String): Coordinate2D = Triple(x, y, description)

I guess so. might as well just make it a function I guess at that point named

coordinate()

. haha.