test "Variadic Sum" {
    // We can't define full variadic functions inside tests easily due to closure wrapping in some contexts?
    // Actually, global functions are better. But tests usually run in main.
    // Let's rely on declared test function below.
    assert(sum_all(3, 10, 20, 30) == 60);
    assert(sum_all(5, 1, 1, 1, 1, 1) == 5);
    puts("OK");
}

fn sum_all(count: int, ...) -> int {
    var total = 0;
    var ap: va_list;
    va_start(ap, count);
    
    for (var i = 0; i < count; i = i + 1) {
        total = total + va_arg(ap, int);
    }
    
    va_end(ap);
    return total;
}