Struct ArcRecursion 

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

The possibly recursive reference to the parent anchor that must be ArcRecursive, thread safe It is more complex to use than RcRecursive (you need to 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> 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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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.

impl<T> Eq for ArcRecursion<T>