Struct differential_dataflow::trace::layers::ordered_leaf::OrderedLeafCursor

pub struct OrderedLeafCursor { /* fields omitted */ }

A cursor for walking through an unordered sequence of values.

This cursor does not support seek, though I'm not certain how to expose this.

Trait Implementations

impl Debug for OrderedLeafCursor

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<K: Clone, R: Clone> Cursor<OrderedLeaf<K, R>> for OrderedLeafCursor

type Key = (K, R)

The type revealed by the cursor.

fn key<'a>(&self, storage: &'a OrderedLeaf<K, R>) -> &'a Self::Key

Reveals the current key.

fn step(&mut self, storage: &OrderedLeaf<K, R>)

Advances the cursor by one element.

fn seek(&mut self, _storage: &OrderedLeaf<K, R>, _key: &Self::Key)

Advances the cursor until the location where key would be expected.

fn valid(&self, _storage: &OrderedLeaf<K, R>) -> bool

Returns true if the cursor points at valid data. Returns false if the cursor is exhausted.

fn rewind(&mut self, _storage: &OrderedLeaf<K, R>)

Rewinds the cursor to its initial state.

fn reposition(
    &mut self,
    _storage: &OrderedLeaf<K, R>,
    lower: usize,
    upper: usize
)

Repositions the cursor to a different range of values.