ninedraft

use std::convert::AsMut;

fn clone_into_array<A, T>(slice: &[T]) -> Option<A>
    where A: Sized + Default + AsMut<[T]>,
          T: Clone
{
    let mut arr = Default::default();
    {
        let mut_arr = <A as AsMut<[T]>>::as_mut(&mut arr);
        let arr_len = mut_arr.len();