Struct async_std::task::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: 1.83.0) · source

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

Creates a new Context from a &Waker.

1.36.0 (const: 1.83.0) · 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.

Trait Implementations§

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> 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<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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more