match_sumtype.v

enum Color {
	red
	blue
	green
}
struct Rgb{
	r int
	g int
        b int
}
type MColor = Color | Rgb

fn is_red_or_blue(c MColor) bool {
	return match c {
		Color {
                  match it {
                    .red {true}
                    .blue {false}
                     else {false}
                  }
                }
		Rgb { true }
                else {false}
	}
}

fn main() {
   print(is_red_or_blue(Color.red))
}