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Context

snafu::futures::try_stream

Struct Context 

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pub struct Context<St, C, E> { /* private fields */ }
Available on crate feature futures only.
Expand description

Stream for the context combinator.

See the TryStreamExt::context method for more details.

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impl<St: Debug, C: Debug, E: Debug> Debug for Context<St, C, E>

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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<St, C, E> Stream for Context<St, C, E>
where St: TryStream, C: IntoError<E, Source = St::Error> + Clone, E: Error + ErrorCompat,

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type Item = Result<<St as TryStream>::Ok, E>

Values yielded by the stream.
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fn poll_next( self: Pin<&mut Self>, ctx: &mut TaskContext<'_>, ) -> Poll<Option<Self::Item>>

Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None if the stream is exhausted. Read more
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fn size_hint(&self) -> (usize, Option<usize>)

Returns the bounds on the remaining length of the stream. Read more
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impl<'pin, St, C, E> Unpin for Context<St, C, E>
where PinnedFieldsOf<__Context<'pin, St, C, E>>: Unpin,

Auto Trait Implementations§

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impl<St, C, E> Freeze for Context<St, C, E>
where St: Freeze, C: Freeze, PhantomData<E>: Freeze,

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impl<St, C, E> RefUnwindSafe for Context<St, C, E>
where St: RefUnwindSafe, C: RefUnwindSafe, PhantomData<E>: RefUnwindSafe,

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impl<St, C, E> Send for Context<St, C, E>
where St: Send, C: Send, PhantomData<E>: Send,

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impl<St, C, E> Sync for Context<St, C, E>
where St: Sync, C: Sync, PhantomData<E>: Sync,

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impl<St, C, E> UnsafeUnpin for Context<St, C, E>
where St: UnsafeUnpin, C: UnsafeUnpin, PhantomData<E>: UnsafeUnpin,

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impl<St, C, E> UnwindSafe for Context<St, C, E>
where St: UnwindSafe, C: UnwindSafe, PhantomData<E>: UnwindSafe,

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 = !

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<S, T, E> TryStream for S
where S: Stream<Item = Result<T, E>> + ?Sized,

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type Ok = T

The type of successful values yielded by this future
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type Error = E

The type of failures yielded by this future
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fn try_poll_next( self: Pin<&mut S>, cx: &mut Context<'_>, ) -> Poll<Option<Result<<S as TryStream>::Ok, <S as TryStream>::Error>>>

Poll this TryStream as if it were a Stream. Read more
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impl<St> TryStreamExt for St
where St: TryStream,

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fn context<C, E>(self, context: C) -> Context<St, C, E>
where C: IntoError<E, Source = <St as TryStream>::Error> + Clone, E: Error + ErrorCompat,

Available on crate feature futures only.
Extend a TryStream’s error with additional context-sensitive information. Read more
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fn with_context<F, C, E>(self, context: F) -> WithContext<St, F, E>
where F: FnMut(&mut <St as TryStream>::Error) -> C, C: IntoError<E, Source = <St as TryStream>::Error>, E: Error + ErrorCompat,

Available on crate feature futures only.
Extend a TryStream’s error with lazily-generated context-sensitive information. Read more
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fn whatever_context<S, E>(self, context: S) -> WhateverContext<St, S, E>
where S: Into<String>, E: FromString,

Available on crate feature futures and (crate features alloc) only.
Extend a TryStream’s error with information from a string. Read more
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fn with_whatever_context<F, S, E>( self, context: F, ) -> WithWhateverContext<St, F, E>
where F: FnMut(&mut <St as TryStream>::Error) -> S, S: Into<String>, E: FromString,

Available on crate feature futures and (crate features alloc) only.
Extend a TryStream’s error with information from a lazily-generated string. Read more