Struct Weak 

pub struct Weak<T> { /* private fields */ }

A weak reference that does not prevent deallocation.

Weak references can be upgraded to strong references if the value is still alive.

Implementations

impl<T: Clone> Weak<T>

pub fn from_rc(rc: &Rc<T>) -> Self

Create a new weak reference from a strong reference.

pub fn upgrade(&self) -> Option<Rc<T>>

Try to upgrade this weak reference to a strong reference.

pub fn is_alive(&self) -> bool

Check if the referenced value is still alive.

pub fn invalidate(&self)

Mark this weak reference as dead (the strong references are all gone).

Trait Implementations

impl<T: Debug> Debug for Weak<T>

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

Formats the value using the given formatter.