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WhateverContext

snafu::futures::try_future

Struct WhateverContext 

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pub struct WhateverContext<Fut, S, E> { /* private fields */ }
Available on crate feature futures only.
Expand description

Future for the whatever_context combinator.

See the TryFutureExt::whatever_context method for more details.

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impl<Fut: Debug, S: Debug, E: Debug> Debug for WhateverContext<Fut, S, 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<Fut, S, E> Future for WhateverContext<Fut, S, E>
where Fut: TryFuture, S: Into<String>, E: FromString, Fut::Error: Into<E::Source>,

Available on crate features alloc only.
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type Output = Result<<Fut as TryFuture>::Ok, E>

The type of value produced on completion.
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fn poll(self: Pin<&mut Self>, ctx: &mut TaskContext<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
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impl<'pin, Fut, S, E> Unpin for WhateverContext<Fut, S, E>
where PinnedFieldsOf<__WhateverContext<'pin, Fut, S, E>>: Unpin,

Auto Trait Implementations§

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impl<Fut, S, E> Freeze for WhateverContext<Fut, S, E>
where Fut: Freeze, S: Freeze,

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impl<Fut, S, E> RefUnwindSafe for WhateverContext<Fut, S, E>
where Fut: RefUnwindSafe, S: RefUnwindSafe, E: RefUnwindSafe,

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impl<Fut, S, E> Send for WhateverContext<Fut, S, E>
where Fut: Send, S: Send, E: Send,

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impl<Fut, S, E> Sync for WhateverContext<Fut, S, E>
where Fut: Sync, S: Sync, E: Sync,

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impl<Fut, S, E> UnsafeUnpin for WhateverContext<Fut, S, E>
where Fut: UnsafeUnpin, S: UnsafeUnpin,

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impl<Fut, S, E> UnwindSafe for WhateverContext<Fut, S, E>
where Fut: UnwindSafe, S: UnwindSafe, 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<F> IntoFuture for F
where F: Future,

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type Output = <F as Future>::Output

The output that the future will produce on completion.
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type IntoFuture = F

Which kind of future are we turning this into?
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fn into_future(self) -> <F as IntoFuture>::IntoFuture

Creates a future from a value. Read more
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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<F, T, E> TryFuture for F
where F: Future<Output = 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( self: Pin<&mut F>, cx: &mut Context<'_>, ) -> Poll<<F as Future>::Output>

Poll this TryFuture as if it were a Future. Read more
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impl<Fut> TryFutureExt for Fut
where Fut: TryFuture,

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fn context<C, E>(self, context: C) -> Context<Fut, C, E> ⓘ
where C: IntoError<E, Source = <Fut as TryFuture>::Error>, E: Error + ErrorCompat,

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

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

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

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