Struct rc::Weak [−] [src]

pub struct Weak<T> {
    // some fields omitted
}

A weak version of Rc<T>.

Weak references do not count when determining if the inner value should be dropped.

Methods

Upgrades a weak reference to a strong reference.

Upgrades the Weak<T> reference to an Rc<T>, if possible.

Returns None if there were no strong references and the data was destroyed.

use rc::Rc;

let five = Rc::new(5);

let weak_five = five.downgrade();

let strong_five: Option<Rc<_>> = weak_five.upgrade();