Struct futures::prelude::future::WeakShared

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pub struct WeakShared<Fut>(_) 
where
    Fut: Future;

Expand description

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

Implementations

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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

1.0.0 · source

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

impl<Fut> !RefUnwindSafe for WeakShared<Fut>

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

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

impl<Fut> Unpin for WeakShared<Fut>

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,

const: unstable · source

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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

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> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

Struct futures::prelude::future::WeakShared

Implementations

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

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

Trait Implementations

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

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

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

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

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

Auto Trait Implementations

impl<Fut> !RefUnwindSafe for WeakShared<Fut>

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

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

impl<Fut> Unpin for WeakShared<Fut>

impl<Fut> !UnwindSafe for WeakShared<Fut>

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where
T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Struct futures::prelude::future::WeakShared

Implementations

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

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

Trait Implementations

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

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

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

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

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

Auto Trait Implementations

impl<Fut> !RefUnwindSafe for WeakShared<Fut>

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

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

impl<Fut> Unpin for WeakShared<Fut>

impl<Fut> !UnwindSafe for WeakShared<Fut>

Blanket Implementations

impl<T> Any for T where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for T where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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

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

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

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

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

impl<T> Any for T where
T: 'static + ?Sized,

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

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

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

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

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,