Sum up a vector of optional numbers

sum_missing.rs

use std::iter::Sum;

fn sum_with_missing<T: Sum + Copy>(vec: &Vec<Option<T>>) -> T {
    vec.into_iter().filter_map(|x| *x).sum()
}

fn main() {
    let mut v = vec![Some(1), Some(2), Some(3), None, Some(5)];
    println!("{}", sum_with_missing(&v));

    v.push(Some(10));

    println!("{}", sum_with_missing(&v));

    let mut f = vec![Some(1.0), Some(2.0), Some(3.0), None, Some(5.1)];
    println!("{}", sum_with_missing(&f));
}

Outputs

11
21
11.1