exercism 0.1.9

My exercism
Documentation 
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#[derive(Debug, PartialEq, Eq)]
pub enum Comparison {
    Equal,
    Sublist,
    Superlist,
    Unequal,
}

pub fn sublist<T: PartialEq>(_first_list: &[T], _second_list: &[T]) -> Comparison {
    use Comparison::*;
    match (_first_list.len(), _second_list.len()) {
        (0, 0) => Equal,
        (0, _) => Sublist,
        (_, 0) => Superlist,
        (m, n) if m > n => if _first_list.windows(n).any(|v| v == _second_list) {Superlist} else {Unequal},
        (m, n) if m < n => if _second_list.windows(m).any(|v| v == _first_list) {Sublist} else {Unequal},
        (_, _) => if _first_list == _second_list {Equal} else {Unequal},
    }
}