Attempt to update code for Rust 0.6

find_even_generic.rs

extern mod std;
use core::num::IntConvertible;
use core::ops::Modulo;

fn find_even<T:Copy+Modulo<T,T>+IntConvertible+cmp::Eq>(vec: &[T]) -> Option<T> {
    let zero: T = IntConvertible::from_int(0);
    let two: T = IntConvertible::from_int(2);
    for vec.each |x| {
        if *x % two == zero {
            return Some(*x);
        }
    }
    None
}

fn main() {
    io::println(match find_even(@[1,2,3,5,7,9,10]) {
        Some(x) => int::to_str(x),
        None    => ~"No even numbers"
    });
}

// Output:
// find_even_generic.rs:17:22: 17:31 error: failed to find an implementation of trait core::num::IntConvertible for <V2>
// find_even_generic.rs:17     io::println(match find_even(@[1,2,3,5,7,9,10]) {
//                                               ^~~~~~~~~