Trait StorageIterator 

pub trait StorageIterator {
    type KeyType<'a>: PartialEq + Eq + PartialOrd + Ord
       where Self: 'a;

    // Required methods
    fn value(&self) -> &[u8] ;
    fn key(&self) -> Self::KeyType<'_>;
    fn is_valid(&self) -> bool;
    fn next(&mut self) -> Result<()>;

    // Provided method
    fn num_active_iterators(&self) -> usize { ... }
}

Required Associated Types

type KeyType<'a>: PartialEq + Eq + PartialOrd + Ord where Self: 'a

Required Methods

fn value(&self) -> &[u8]

Get the current value.

fn key(&self) -> Self::KeyType<'_>

Get the current key.

fn is_valid(&self) -> bool

Check if the current iterator is valid.

fn next(&mut self) -> Result<()>

Move to the next position.

Provided Methods

fn num_active_iterators(&self) -> usize

Number of underlying active iterators for this iterator.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl StorageIterator for LsmIterator

type KeyType<'a> = &'a [u8]

impl StorageIterator for MemTableIterator

type KeyType<'a> = Key<&'a [u8]>

impl StorageIterator for TxnIterator

type KeyType<'a> = &'a [u8] where Self: 'a

impl StorageIterator for TxnLocalIterator

type KeyType<'a> = &'a [u8]

impl StorageIterator for SsTableIterator

type KeyType<'a> = Key<&'a [u8]>

impl StorageIterator for SstConcatIterator

type KeyType<'a> = Key<&'a [u8]>

impl<A: 'static + StorageIterator, B: 'static + for<'a> StorageIterator<KeyType<'a> = A::KeyType<'a>>> StorageIterator for TwoMergeIterator<A, B>

type KeyType<'a> = <A as StorageIterator>::KeyType<'a>

impl<I: 'static + for<'a> StorageIterator<KeyType<'a> = KeySlice<'a>>> StorageIterator for MergeIterator<I>

type KeyType<'a> = Key<&'a [u8]>

impl<I: StorageIterator> StorageIterator for FusedIterator<I>

type KeyType<'a> = <I as StorageIterator>::KeyType<'a> where Self: 'a