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Struct ekv::Cursor

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pub struct Cursor<'a, F: Flash + 'a, M: RawMutex + 'a> { /* private fields */ }
Expand description

Cursor for a range read.

Returned by ReadTransaction::read_all() and ReadTransaction::read_range().

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impl<'a, F: Flash + 'a, M: RawMutex + 'a> Cursor<'a, F, M>

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pub async fn next( &mut self, key: &mut [u8], value: &mut [u8], ) -> Result<Option<(usize, usize)>, CursorError<F::Error>>

Get the next key/value entry.

If the cursor has not reached the end, the next entry in lexicographically ascending order is read into the start of the key and value buffers. The respective lengths are returned: Ok(Some((key_len, value_len))).

If the cursor has reached the end of the iteration, Ok(None) is returned.

Auto Trait Implementations§

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impl<'a, F, M> Freeze for Cursor<'a, F, M>

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impl<'a, F, M> !RefUnwindSafe for Cursor<'a, F, M>

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impl<'a, F, M> Send for Cursor<'a, F, M>
where M: Sync, F: Send,

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impl<'a, F, M> Sync for Cursor<'a, F, M>
where M: Sync, F: Send,

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impl<'a, F, M> Unpin for Cursor<'a, F, M>

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impl<'a, F, M> !UnwindSafe for Cursor<'a, F, M>

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.