fn main() {

struct Unit { kind: i32, hp: i32, x: f32, y: f32, name: Vec<u8> }
impl Default for Unit {
    fn default() -> Self {
        Self { kind: 0, hp: 100, x: 0.0, y: 0.0, name: Vec::new() }
    }
}
let scout = Unit { kind: 2, x: 1.5, ..Unit::default() };
let mut selected = Unit::default();
let mut log: Vec<Vec<u8>> = Vec::new();

assert_eq!((scout.kind, scout.hp, scout.x, scout.y, scout.name.len()), (2,100,1.5,0.0,0)); assert_eq!(selected.hp,100); selected.hp=1; log.push(vec![]); assert_eq!((selected.hp,log.len()),(1,1));
}