Rust EZ Pointer

EZ.rs

use std::rc::Rc;
use std::cell::RefCell;

#[derive(Clone)]
struct EZ<T> {
    inner: Rc<RefCell<T>>,
}

impl<T> EZ<T> {
    fn new(value: T) -> Self {
        EZ {
            inner: Rc::new(RefCell::new(value)),
        }
    }
    fn value_with<F, R>(&self, f: F) -> R
    where
        F: FnOnce(&T) -> R,
    {
        f(&self.inner.try_borrow().unwrap())
    }
    fn write<F>(&self, f: F)
    where
        F: FnOnce(&mut T),
    {
        f(&mut self.inner.try_borrow_mut().unwrap())
    }
}

impl<T> EZ<T> where T: Copy {
    fn value(&self) -> T {
        *self.inner.try_borrow().unwrap()
    }
}