Struct dendron::tree::TreeWeak

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

Expand description

A weak reference to the tree, without ownership.

Implementations

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impl<T> TreeWeak<T>

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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

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impl<T> Clone for TreeWeak<T>

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fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source

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

Performs copy-assignment from source. Read more

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impl<T> Debug for TreeWeak<T>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<T> !RefUnwindSafe for TreeWeak<T>

impl<T> !Send for TreeWeak<T>

impl<T> !Sync for TreeWeak<T>

impl<T> Unpin for TreeWeak<T>

impl<T> !UnwindSafe for TreeWeak<T>

Blanket Implementations

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impl<T> Any for T where
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct dendron::tree::TreeWeak

Implementations

impl<T> TreeWeak<T>

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

Trait Implementations

impl<T> Clone for TreeWeak<T>

fn clone(&self) -> Self

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

impl<T> Debug for TreeWeak<T>

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

Auto Trait Implementations

impl<T> !RefUnwindSafe for TreeWeak<T>

impl<T> !Send for TreeWeak<T>

impl<T> !Sync for TreeWeak<T>

impl<T> Unpin for TreeWeak<T>

impl<T> !UnwindSafe for TreeWeak<T>

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where
U: From<T>,

fn into(self) -> U

impl<T> ToOwned for T where
T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct dendron::tree::TreeWeak

Implementations

impl<T> TreeWeak<T>

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

Trait Implementations

impl<T> Clone for TreeWeak<T>

fn clone(&self) -> Self

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

impl<T> Debug for TreeWeak<T>

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

Auto Trait Implementations

impl<T> !RefUnwindSafe for TreeWeak<T>

impl<T> !Send for TreeWeak<T>

impl<T> !Sync for TreeWeak<T>

impl<T> Unpin for TreeWeak<T>

impl<T> !UnwindSafe for TreeWeak<T>

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for T where U: From<T>,

fn into(self) -> U

impl<T> ToOwned for T where T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<T, U> Into<U> for T where
U: From<T>,

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,