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kotlinlang

some sample would help.
but if you want to provide some compatibility with outside consumers:
```
typealias Coordinate2D = Triple&lt;Int, Int, String&gt;
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&lt;Int, Int, String&gt;`, 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.