also I realize it can probably be done via reflection, but want to avoid that

# announcements

[Nir]

also I realize it can probably be done via reflection, but want to avoid that

[Nikky]

issue is that you know you need a D but the specific of the instance of D used to construct a point are thrown away and only the dimension attribute is kept

with reified you can get the type that was used, but still won't get you the DimThree object
i currently see no way around restructuring this or storing the dimension.. or at the least D::dimension

from what i can tell the length of data is always D::dimension and everything should be fine as long as that matches.. maybe that is good enough ?

[Nir]

hmm, you gave me an idea, I think it can be done with another private constructor, perhaps

[Nir]

not a real solution of course but a workaround

[Nir]

data class Point<D : Dimension> private constructor(val data: List<Int>) {
    constructor(d: D, init: (Int) -> Int) : this(List(d.dimension, init))
    operator fun <D : Dimension> plus(p: Point<D>) = Point<D>(data.zip(p.data) { x, y -> x + y } )
}

[Nir]

basically the solution was just to make that function a member function, and use the private constructor