async_utils::fold

Enum FoldResult

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pub enum FoldResult<F, R> {
    StreamEnded(F),
    ShortCircuited(R),
}
Expand description

The result of folding a stream.

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StreamEnded(F)

The stream ended with folded state F.

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ShortCircuited(R)

The stream was short-cirtuited with result R.

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impl<F, R> FoldResult<F, R>

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pub fn ended(self) -> Result<F, R>

Transforms into Result mapping the FoldResult::StreamEnded variant into Ok.

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pub fn short_circuited(self) -> Result<R, F>

Transforms into Result mapping the FoldResult::ShortCircuited variant into Ok.

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impl<F> FoldResult<F, F>

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pub fn into_inner(self) -> F

Unwraps this FoldResult into its inner value, discarding the variant information.

Trait Implementations§

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impl<F: Clone, R: Clone> Clone for FoldResult<F, R>

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fn clone(&self) -> FoldResult<F, R>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<F: Debug, R: Debug> Debug for FoldResult<F, R>

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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<F: PartialEq, R: PartialEq> PartialEq for FoldResult<F, R>

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fn eq(&self, other: &FoldResult<F, R>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<F: Copy, R: Copy> Copy for FoldResult<F, R>

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impl<F: Eq, R: Eq> Eq for FoldResult<F, R>

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impl<F, R> StructuralPartialEq for FoldResult<F, R>

Auto Trait Implementations§

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impl<F, R> Freeze for FoldResult<F, R>
where F: Freeze, R: Freeze,

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impl<F, R> RefUnwindSafe for FoldResult<F, R>
where F: RefUnwindSafe, R: RefUnwindSafe,

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impl<F, R> Send for FoldResult<F, R>
where F: Send, R: Send,

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impl<F, R> Sync for FoldResult<F, R>
where F: Sync, R: Sync,

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impl<F, R> Unpin for FoldResult<F, R>
where F: Unpin, R: Unpin,

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impl<F, R> UnwindSafe for FoldResult<F, R>
where F: UnwindSafe, R: 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. 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> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. 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<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
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impl<St> WithTag for St

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fn tagged<T>(self, tag: T) -> Tagged<T, St> ⓘ

Produce a new stream from this one which yields item tupled with a constant tag