struct Left[E] {
    error E
}

struct Right[T] {
    inner T
}

type Either[T, E] = Left[E] | Right[T]

fn works(v []Either[int, int]) {
    first := v[0]
    match first {
        Left[int] {
            println(first.error)
        }
        else {}
    }
}

fn doesntwork(v []Either[int, int]) {
    match v[0] {
        Left[int] {
            println(v[0].error)
        }
        else {}
    }
}

fn main() {}