use selfie::refs::RefType;
use selfie::Selfie;
use std::cell::RefCell;

// From https://github.com/Voultapher/self_cell/issues/28

struct Bar<'a>(RefCell<(Option<&'a Bar<'a>>, String)>);

struct BarRef;
impl<'a> RefType<'a> for BarRef {
    type Ref = Bar<'a>;
}

fn main() {
    let value = Box::pin(());

    let mut selfie: Selfie<Box<()>, BarRef> =
        Selfie::new(value, |_| Bar(RefCell::new((None, "Hello".to_owned()))));

    selfie.with_referential(|referential| {
        referential.0.borrow_mut().0 = Some(selfie.with_referential(|r| r));
    });

    selfie.with_referential_mut(|dep| {
        let r1 = dep.0.get_mut();
        let string_ref_1 = &mut r1.1;
        let mut r2 = r1.0.unwrap().0.borrow_mut();
        let string_ref_2 = &mut r2.1;

        let s = &string_ref_1[..];
        string_ref_2.clear();
        string_ref_2.shrink_to_fit();
        println!("{}", s); // prints garbage
    });
}