type Int = int | u8

struct Counter {
mut:
    value int
}

fn bump(mut values []int) {
    values << 2
}

fn inc_copy(value int) int {
    value += 1
    return value
}

fn main() {
    counter := Counter{}
    counter.value++
    arr := [1]
    arr << 2
    nums := [1]
    bump(nums)
    i := Int(0)
    if i is int {
        i = 1
    }
    match i {
        int {
            i = 2
        }
        u8 {}
    }

    println('${counter.value} ${arr.len} ${nums.len} ${inc_copy(1)} ${i}')
}