#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::cell::Cell;
use std::ptr::NonNull;
use std::process::abort;
use std::marker::PhantomData;
struct Rc<T: ?Sized> {
    ptr: NonNull<RcInner<T>>,
    phantom: PhantomData<RcInner<T>>,
}
struct RcInner<T: ?Sized> {
    strong: Cell<usize>,
    refcount: Cell<usize>,
    value: T,
}
impl<T: ?Sized> Clone for Rc<T> {
    fn clone(&self) -> Rc<T> {
        self.inc_strong();
        Rc {
            ptr: self.ptr,
            phantom: PhantomData,
        }
    }
}
trait RcInnerPtr<T: ?Sized> {
    fn inner(&self) -> &RcInner<T>;
    fn strong(&self) -> usize {
        self.inner().strong.get()
    }
    fn inc_strong(&self) {
        self.inner().strong.set(self.strong().checked_add(1).unwrap_or_else(|| abort()));
    }
}
impl<T: ?Sized> RcInnerPtr<T> for Rc<T> {
    fn inner(&self) -> &RcInner<T> {
        unsafe { self.ptr.as_ref() }
    }
}
fn main() {}