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Context

Struct Context 

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

The Context of an asynchronous task.

Unlike std::task::Context, this context optionally contains a waker.

This is necessary because try_send and try_recv need to poll, but the task waker should not be saved if the try returns pending.

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impl<'a> Context<'a>

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pub fn from_waker(waker: &'a Waker) -> Self

Create a new Context from a &Waker.

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pub fn empty() -> Self

Create an empty context with no waker.

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

Returns an optional reference to the Waker for the current task.

Trait Implementations§

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impl Debug for Context<'_>

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

Formats the value using the given formatter. Read more
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impl<'a> From<&Context<'a>> for Context<'a>

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fn from(cx: &Context<'a>) -> Self

Converts to this type from the input type.
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impl<'a> From<&mut Context<'a>> for Context<'a>

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fn from(cx: &mut Context<'a>) -> Self

Converts to this type from the input type.
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impl<'a> From<Context<'a>> for Context<'a>

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fn from(cx: Context<'a>) -> Self

Converts to this type from the input type.

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> UnsafeUnpin 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.