Sieve of Eratosthenes in Rust

primes.rs

pub fn main() {
    let limit = 1000000;
    let mut sieve = Vec::with_capacity(limit-2);
    for _ in (2..limit) {
        sieve.push(true);
    }
    for ix in(0..limit-2) {
        if sieve[ix] {
            println!("{}", ix + 2);
            for i in (2..).map(|i| i * (ix + 2) - 2).take_while(|&i| i < limit - 2) {
                sieve[i] = false;
            }
        }
    }
}