Struct ArcRecursion 

#[repr(transparent)]
pub struct ArcRecursion<T>(pub Weak<Mutex<Option<T>>>);

Thread-safe recursive reference to a parent ArcRecursive anchor. It is more complex to use than RcRecursive because you must lock it before accessing the value. See ArcRecursive for code example.

Tuple Fields

0: Weak<Mutex<Option<T>>>

Implementations

impl<T> ArcRecursion<T>

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

Try to upgrade the weak reference to ArcRecursive<T>.

pub fn with<R>(&self, f: impl FnOnce(&T) -> R) -> Option<R>

Access the recursive value in one step, if it is still alive.

pub fn is_dangling(&self) -> bool

Returns true if the underlying value has been dropped (no strong refs remain).

Trait Implementations

impl<T: Clone> Clone for ArcRecursion<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for ArcRecursion<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for ArcRecursion<T>

where T: Deserialize<'de> + Send + Sync + 'static,

Available on crate feature deserialize only.

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Eq for ArcRecursion<T>

impl<T> From<&ArcRecursive<T>> for ArcRecursion<T>

fn from(ara: &ArcRecursive<T>) -> Self

Converts to this type from the input type.

impl<T> PartialEq for ArcRecursion<T>

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: Serialize> Serialize for ArcRecursion<T>

fn serialize<S: Serializer>(&self, s: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.