#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![allow(dead_code)]
use std::marker::PhantomData;
struct Slice<'a, T> {
    start: *const T,
    end: *const T,
    phantom: PhantomData<&'a T>,
}
fn borrow_vec<T>(vec: &Vec<T>) -> Slice<'_, T> {
    let ptr = vec.as_ptr();
    Slice {
        start: ptr,
        end: unsafe { ptr.add(vec.len()) },
        phantom: PhantomData,
    }
}
fn main() {}