#![feature(pin)]
#![feature(optin_builtin_traits)]

use std::pin::Pin;
use std::marker::{Unpin};
use std::ptr::NonNull;


struct Unmovable {
    data: String,
    slice: NonNull<String>,
}

impl !Unpin for Unmovable {

}

impl Unmovable {
    fn new(data: String) -> Self {
        Unmovable {
            data,
            slice: NonNull::dangling(),
        }
    }
}

#[cfg(test)]
mod tests {
    use std::ptr::NonNull;
    use super::Unmovable;

    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }

    #[test]
    fn unmovable() {
        let unmoved = Unmovable::new("hello".to_string());
        let mut still_unmoved = unmoved;
        assert_eq!(still_unmoved.slice, NonNull::from(&still_unmoved.data));
    }
}