slice and raw pointer mututal conversions in rust

slice_ptr_mutual_conversion.rs

#![allow(unused)]

fn to_mut_ptr(data: Vec<u8>) -> *mut u8 {
    unsafe { data.to_owned().as_mut_ptr() }
}

fn main() {
    let s = String::from("hello world");

    let mut storage = vec![0; s.len()];
    storage.fill(0);

    let storage_mut_ptr = to_mut_ptr(storage);

    unsafe {
        std::ptr::copy_nonoverlapping(s.as_bytes().as_ptr(), storage_mut_ptr, s.len());
    }
    unsafe {
        let storage_mut_slice = std::slice::from_raw_parts_mut(storage_mut_ptr, s.len());
        println!("{}", std::str::from_utf8_unchecked(&storage_mut_slice[..]));
    }
}