Is there an easy way to count booleans in Rust?

Question

I've encountered a scenario in which I have a known, small number of boolean values, but I don't care about them individually, I just want to determine how many of them are true. It seems like there should be a fast way of doing this, but the best I can come up with is the naive solution:

let mut count: u8 = 0;
if a {
    count += 1;
}
if b {
    count += 1;
}
if c {
    count += 1;
}

Is there a better way of doing this?

Answer 1

You could simply do:

let count = a as u8 + b as u8 + c as u8;