Struct zng_var::types::WeakArcVar

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pub struct WeakArcVar<T: VarValue>(/* private fields */);

Expand description

Weak reference to a ArcVar<T>.

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impl<T: VarValue> WeakArcVar<T>

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pub fn new() -> Self

New reference to nothing.

Trait Implementations§

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impl<T: VarValue> AnyWeakVar for WeakArcVar<T>

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fn clone_any(&self) -> BoxedAnyWeakVar

Clone the weak reference.

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fn strong_count(&self) -> usize

Gets the number of strong references to the variable. Read more

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fn weak_count(&self) -> usize

Gets the number of weak references to the variable. Read more

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fn upgrade_any(&self) -> Option<BoxedAnyVar>

Upgrade to a strong AnyVar clone. Read more

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fn as_any(&self) -> &dyn Any

Access to dyn Any methods.

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impl<T: Clone + VarValue> Clone for WeakArcVar<T>

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

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl<T: VarValue> Default for WeakArcVar<T>

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fn default() -> Self

Returns the “default value” for a type. Read more

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impl<T: VarValue> WeakVar<T> for WeakArcVar<T>

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type Upgrade = ArcVar<T>

Output of WeakVar::upgrade.

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fn upgrade(&self) -> Option<ArcVar<T>>

Upgrade to a strong BoxedVar<T> clone. Read more

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fn boxed(self) -> BoxedWeakVar<T>
where Self: Sized,

Gets the weak reference a as BoxedWeakVar<T>, does not double box.

Auto Trait Implementations§

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impl<T> !UnwindSafe for WeakArcVar<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,

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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,

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

Mutably borrows from an owned value. Read more

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

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unsafe fn clone_to_uninit(&self, dst: *mut T)

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

Performs copy-assignment from self to dst. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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