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().
Implementations§
source§impl<'a, F: Flash + 'a, M: RawMutex + 'a> Cursor<'a, F, M>
impl<'a, F: Flash + 'a, M: RawMutex + 'a> Cursor<'a, F, M>
sourcepub async fn next(
&mut self,
key: &mut [u8],
value: &mut [u8]
) -> Result<Option<(usize, usize)>, CursorError<F::Error>>
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§
impl<'a, F, M> Freeze for Cursor<'a, F, M>
impl<'a, F, M> !RefUnwindSafe for Cursor<'a, F, M>
impl<'a, F, M> Send for Cursor<'a, F, M>
impl<'a, F, M> Sync for Cursor<'a, F, M>
impl<'a, F, M> Unpin for Cursor<'a, F, M>
impl<'a, F, M> !UnwindSafe for Cursor<'a, F, M>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more