Struct TreeWeak 

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

A weak reference to the tree, without ownership.

Implementations

impl<T> TreeWeak<T>

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

Attempts to upgrade the weak reference of a tree to a Tree.

Returns None if the target tree is already dropped.

use dendron::tree;

let tree = tree!("root");
let tree_weak = tree.downgrade();
assert!(tree_weak.upgrade().is_some());

drop(tree);
assert!(tree_weak.upgrade().is_none());

Trait Implementations

impl<T> Clone for TreeWeak<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> Debug for TreeWeak<T>

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

Formats the value using the given formatter.