Reverse a singly linked list in rust

reverse_list.rs

#[derive(PartialEq, Eq, Clone, Debug)]
pub struct ListNode {
    pub val: i32,
    pub next: Option<Box<ListNode>>,
}

impl ListNode {
    #[inline]
    fn new(val: i32) -> Self {
        ListNode { next: None, val }
    }

    fn push(&mut self, val: i32) {
        if let Some(next) = &mut self.next {
            next.push(val);
        } else {
            self.next = Some(Box::new(ListNode::new(val)));
        }
    }

    fn head(&self) -> i32 {
        self.val
    }
}

struct Solution {}

pub fn reverse_list(head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
    let mut list = head.clone();
    let mut prev: Option<Box<ListNode>> = None;
    while let Some(h) = &mut list {
        let next = std::mem::replace(&mut h.next, prev.to_owned());
        prev = list;
        list = next;
    }
    return prev;
}