Struct WeakRefKey 

pub struct WeakRefKey<T>(pub WeakRef<T>);

Wrapper around WeakRef allowing to use it in a Set or as a key of a Map.

Tuple Fields

0: WeakRef<T>

Methods from Deref<Target = WeakRef<T>>

pub fn upgrade(&self) -> Option<TempRef<'_, T>>

Try to upgrade the WeakRef into a TempRef. This will fail as soon as the last OwnedRef is released, even if some TempRef still exist at that time. The returned TempRef must be dropped as soon as possible. In particular, it must not be kept across blocking calls.

pub fn re_own(&self) -> Option<OwnedRef<T>>

Try to upgrade the WeakRef into a OwnedRef. This will fail as soon as the last OwnedRef is released.

pub fn as_ptr(&self) -> *const T

Returns a raw pointer to the object T pointed to by this WeakRef.

See Weak::as_ptr

Trait Implementations

impl<T> Clone for WeakRefKey<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 WeakRefKey<T>

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

Formats the value using the given formatter.

impl<T> Deref for WeakRefKey<T>

type Target = WeakRef<T>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'a, T> From<&OwnedRef<T>> for WeakRefKey<T>

fn from(owned_ref: &OwnedRef<T>) -> Self

Converts to this type from the input type.

impl<'a, T> From<&TempRef<'a, T>> for WeakRefKey<T>

fn from(temp_ref: &TempRef<'a, T>) -> Self

Converts to this type from the input type.

impl<T> From<WeakRef<T>> for WeakRefKey<T>

fn from(weak_ref: WeakRef<T>) -> Self

Converts to this type from the input type.

impl<T> Hash for WeakRefKey<T>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T> Ord for WeakRefKey<T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T> PartialEq for WeakRefKey<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> PartialOrd for WeakRefKey<T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> Eq for WeakRefKey<T>