#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let store = [0, 1, 2, 3];
    let v_orig = store.iter().collect::<Vec<&i32>>();
    let v_clone = v_orig.clone();
    let v_transmuted = unsafe {
        std::mem::transmute::<Vec<&i32>, Vec<Option<&i32>>>(v_clone)
    };
    let v_clone = v_orig.clone();
    let v_collected = v_clone.into_iter().map(Some).collect::<Vec<Option<&i32>>>();
    let v_clone = v_orig.clone();
    let v_from_raw = unsafe {
        let mut v_clone = std::mem::ManuallyDrop::new(v_clone);
        Vec::from_raw_parts(
            v_clone.as_mut_ptr() as *mut Option<&i32>,
            v_clone.len(),
            v_clone.capacity(),
        )
    };
}