futures::task

Struct Context

1.36.0 · Source
pub struct Context<'a> { /* private fields */ }
Expand description

The context of an asynchronous task.

Currently, Context only serves to provide access to a &Waker which can be used to wake the current task.

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impl<'a> Context<'a>

1.36.0 (const: 1.82.0) · Source

pub const fn from_waker(waker: &'a Waker) -> Context<'a>

Creates a new Context from a &Waker.

1.36.0 (const: 1.82.0) · Source

pub const fn waker(&self) -> &'a Waker

Returns a reference to the Waker for the current task.

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pub const fn local_waker(&self) -> &'a LocalWaker

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

Returns a reference to the LocalWaker for the current task.

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pub const fn ext(&mut self) -> &mut (dyn Any + 'static)

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

Returns a reference to the extension data for the current task.

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1.36.0 · Source§

impl Debug for Context<'_>

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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<'a> Freeze for Context<'a>

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impl<'a> RefUnwindSafe for Context<'a>

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impl<'a> !Send for Context<'a>

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impl<'a> !Sync for Context<'a>

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impl<'a> Unpin for Context<'a>

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impl<'a> UnwindSafe for Context<'a>

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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes