Struct WeakRef 

pub struct WeakRef<T: ?Sized> { /* private fields */ }

A weak reference to something a server owns, see Ref::downgrade, which keeps nothing of it alive and can therefore be kept anywhere, a thread of its own in particular. What it upgrades into is a Ref borrowed from it, so that it is only held for as long as it is used.

It is tied to that very thing: a device removed, or replaced by a restart under the same name, no longer upgrades, which is what tells a thread it started to stop.

Implementations

impl<T: ?Sized> WeakRef<T>

pub fn upgrade(&self) -> Option<Ref<'_, T>>

What this refers to, if it is still there.

Trait Implementations

impl<T: ?Sized> Clone for WeakRef<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: ?Sized> Debug for WeakRef<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.