pub struct BatchCursorEnter<C, TInner, F> { /* private fields */ }
Expand description

Wrapper to provide cursor to nested scope.

Trait Implementations§

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impl<TInner, C: Cursor, F> Cursor for BatchCursorEnter<C, TInner, F>
where TInner: Refines<C::Time> + Lattice, F: FnMut(C::Key<'_>, C::Val<'_>, &C::Time) -> TInner,

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type Key<'a> = <C as Cursor>::Key<'a>

Key by which updates are indexed.
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type KeyOwned = <C as Cursor>::KeyOwned

Owned version of the above.
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type Val<'a> = <C as Cursor>::Val<'a>

Values associated with keys.
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type Time = TInner

Timestamps associated with updates
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type Diff = <C as Cursor>::Diff

Associated update.
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type Storage = BatchEnter<<C as Cursor>::Storage, TInner, F>

Storage required by the cursor.
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fn key_valid(&self, storage: &Self::Storage) -> bool

Indicates if the current key is valid. Read more
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fn val_valid(&self, storage: &Self::Storage) -> bool

Indicates if the current value is valid. Read more
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fn key<'a>(&self, storage: &'a Self::Storage) -> Self::Key<'a>

A reference to the current key. Asserts if invalid.
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fn val<'a>(&self, storage: &'a Self::Storage) -> Self::Val<'a>

A reference to the current value. Asserts if invalid.
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fn map_times<L: FnMut(&TInner, &Self::Diff)>( &mut self, storage: &Self::Storage, logic: L )

Applies logic to each pair of time and difference. Intended for mutation of the closure’s scope.
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fn step_key(&mut self, storage: &Self::Storage)

Advances the cursor to the next key.
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fn seek_key(&mut self, storage: &Self::Storage, key: Self::Key<'_>)

Advances the cursor to the specified key.
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fn step_val(&mut self, storage: &Self::Storage)

Advances the cursor to the next value.
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fn seek_val(&mut self, storage: &Self::Storage, val: Self::Val<'_>)

Advances the cursor to the specified value.
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fn rewind_keys(&mut self, storage: &Self::Storage)

Rewinds the cursor to the first key.
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fn rewind_vals(&mut self, storage: &Self::Storage)

Rewinds the cursor to the first value for current key.
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fn get_key<'a>(&self, storage: &'a Self::Storage) -> Option<Self::Key<'a>>

Returns a reference to the current key, if valid.
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fn get_val<'a>(&self, storage: &'a Self::Storage) -> Option<Self::Val<'a>>

Returns a reference to the current value, if valid.
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fn seek_key_owned(&mut self, storage: &Self::Storage, key: &Self::KeyOwned)

Convenience method to get access by reference to an owned key.
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fn to_vec<V, F>( &mut self, from: F, storage: &Self::Storage ) -> Vec<((Self::KeyOwned, V), Vec<(Self::Time, Self::Diff)>)>
where F: Fn(Self::Val<'_>) -> V,

Rewinds the cursor and outputs its contents to a Vec

Auto Trait Implementations§

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impl<C, TInner, F> Freeze for BatchCursorEnter<C, TInner, F>
where C: Freeze, F: Freeze,

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impl<C, TInner, F> RefUnwindSafe for BatchCursorEnter<C, TInner, F>

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impl<C, TInner, F> Send for BatchCursorEnter<C, TInner, F>
where C: Send, F: Send, TInner: Send,

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impl<C, TInner, F> Sync for BatchCursorEnter<C, TInner, F>
where C: Sync, F: Sync, TInner: Sync,

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impl<C, TInner, F> Unpin for BatchCursorEnter<C, TInner, F>
where C: Unpin, F: Unpin, TInner: Unpin,

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impl<C, TInner, F> UnwindSafe for BatchCursorEnter<C, TInner, F>
where C: UnwindSafe, F: UnwindSafe, TInner: 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<R, O, T> CopyOnto<ConsecutiveOffsetPairs<R, O>> for T
where R: Region<Index = (usize, usize)>, O: OffsetContainer<usize>, T: CopyOnto<R>,

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fn copy_onto( self, target: &mut ConsecutiveOffsetPairs<R, O> ) -> <ConsecutiveOffsetPairs<R, O> as Region>::Index

Copy self into the target container, returning an index that allows to look up the corresponding read item.
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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<R, T> PushInto<FlatStack<R>> for T
where R: Region + Clone + 'static, T: CopyOnto<R>,

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fn push_into(self, target: &mut FlatStack<R>)

Push self into the target container.
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impl<T> PushInto<Vec<T>> for T

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fn push_into(self, target: &mut Vec<T>)

Push self into the target container.
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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.