Struct WeakVar 

pub struct WeakVar<T>
where
    T: VarValue,
{ /* private fields */ }

Weak reference to a Var<T>.

Implementations

impl<T> WeakVar<T>

where T: VarValue,

pub fn as_any(&self) -> &WeakAnyVar

Reference the weak variable without the strong value type.

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

Attempt to create a strong reference to the variable.

pub const fn new() -> WeakVar<T>

New weak var that does not upgrade.

Methods from Deref<Target = WeakAnyVar>

pub fn strong_count(&self) -> usize

Current count of strong references to the variable.

pub fn upgrade(&self) -> Option<AnyVar>

Attempt to create a strong reference to the variable.

pub fn var_eq(&self, other: &WeakAnyVar) -> bool

Gets if this and other are a weak reference to the same var.

Trait Implementations

impl<T> Clone for WeakVar<T>

where T: VarValue,

fn clone(&self) -> WeakVar<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for WeakVar<T>

where T: VarValue,

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

Formats the value using the given formatter.

impl<T> Default for WeakVar<T>

where T: VarValue,

fn default() -> WeakVar<T>

Returns the “default value” for a type.

impl<T> Deref for WeakVar<T>

where T: VarValue,

type Target = WeakAnyVar

The resulting type after dereferencing.

fn deref(&self) -> &<WeakVar<T> as Deref>::Target

Dereferences the value.

impl<T> From<WeakVar<T>> for WeakAnyVar

where T: VarValue,

fn from(var: WeakVar<T>) -> WeakAnyVar

Converts to this type from the input type.