Struct WeakShared

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pub struct WeakShared<Fut>(/* private fields */)
where
    Fut: Future;

Expand description

A weak reference to a Shared that can be upgraded much like an Arc.

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impl<Fut> WeakShared<Fut>
where Fut: Future,

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pub fn upgrade(&self) -> Option<Shared<Fut>>

Attempts to upgrade this WeakShared into a Shared.

Returns None if all clones of the Shared have been dropped or polled to completion.

Trait Implementations§

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impl<Fut> Clone for WeakShared<Fut>
where Fut: Future,

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fn clone(&self) -> WeakShared<Fut>

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<Fut> Debug for WeakShared<Fut>
where Fut: Future,

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<Fut> Freeze for WeakShared<Fut>

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impl<Fut> !RefUnwindSafe for WeakShared<Fut>

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impl<Fut> Send for WeakShared<Fut>
where Fut: Send, <Fut as Future>::Output: Send + Sync,

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impl<Fut> Sync for WeakShared<Fut>
where Fut: Send, <Fut as Future>::Output: Send + Sync,

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impl<Fut> Unpin for WeakShared<Fut>

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impl<Fut> !UnwindSafe for WeakShared<Fut>

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 u8)

🔬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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.

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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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