Struct differential_dataflow::trace::wrappers::frontier::BatchFrontier

pub struct BatchFrontier<K, V, T, R, B> { /* fields omitted */ }

Wrapper to provide batch to nested scope.

Methods

impl<K, V, T, R, B> BatchFrontier<K, V, T, R, B> where
    B: BatchReader<K, V, T, R>,
    T: Timestamp + Lattice, 

pub fn make_from(batch: B, frontier: &[T]) -> Self

Makes a new batch wrapper

Trait Implementations

impl<K, V, T, R, B> BatchReader<K, V, T, R> for BatchFrontier<K, V, T, R, B> where
    B: BatchReader<K, V, T, R>,
    T: Timestamp + Lattice, 

type Cursor = BatchCursorFrontier<K, V, T, R, B>

The type used to enumerate the batch's contents.

fn cursor(&self) -> Self::Cursor

Acquires a cursor to the batch's contents.

fn len(&self) -> usize

The number of updates in the batch.

fn description(&self) -> &Description<T>

Describes the times of the updates in the batch.

fn is_empty(&self) -> bool

True if the batch is empty.

fn lower(&self) -> &[T]

All times in the batch are greater or equal to an element of lower.

fn upper(&self) -> &[T]

All times in the batch are not greater or equal to any element of upper.

impl<K, V, T: Clone, R, B: Clone> Clone for BatchFrontier<K, V, T, R, B>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.