odds.rs

#![feature(try_from)]

use std::{ops,convert,clone,fmt};

fn generic_odds<T>(v: &Vec<T>) -> Vec<T>
        where T: ops::Rem<T> + convert::TryFrom<u8> + clone::Clone,
              <T as ops::Rem<T>>::Output: PartialEq<T>,
              <T as convert::TryFrom<u8>>::Err: fmt::Debug {
    v.iter().cloned().filter(|elt| {
        elt.clone() % T::try_from(2u8).unwrap() == T::try_from(1u8).unwrap()
    }).collect()
}

fn odds(v: &Vec<i32>) -> Vec<i32> {
    v.iter().cloned().filter(|&elt| elt % 2 == 1).collect()
}

fn main() {
    let v = vec![1,2,3,4,5];
    println!("{:?}", odds(&v));

    let v2: Vec<u64> = vec![1,2,3,4,5];
    println!("{:?}", generic_odds(&v2));
}