Struct differential_dataflow::trace::wrappers::enter_at::TraceEnter

pub struct TraceEnter<Tr, TInner, F> where
    Tr: TraceReader,  { /* fields omitted */ }

Wrapper to provide trace to nested scope.

Methods

impl<Tr, TInner, F> TraceEnter<Tr, TInner, F> where
    Tr: TraceReader,
    Tr::Time: Timestamp,
    TInner: Refines<Tr::Time> + Lattice, 

pub fn make_from(trace: Tr, logic: Rc<F>) -> Self

Makes a new trace wrapper

Trait Implementations

impl<Tr, TInner, F> TraceReader for TraceEnter<Tr, TInner, F> where
    Tr: TraceReader,
    Tr::Batch: Clone,
    Tr::Key: 'static,
    Tr::Val: 'static,
    Tr::Time: Timestamp,
    TInner: Refines<Tr::Time> + Lattice,
    Tr::R: 'static,
    F: 'static,
    F: Fn(&Tr::Key, &Tr::Val, &Tr::Time) -> TInner, 

type Key = Tr::Key

Key by which updates are indexed.

type Val = Tr::Val

Values associated with keys.

type Time = TInner

Timestamps associated with updates

type R = Tr::R

Associated update.

type Batch = BatchEnter<Tr::Key, Tr::Val, Tr::Time, Tr::R, Tr::Batch, TInner, F>

The type of an immutable collection of updates.

type Cursor = CursorEnter<Tr::Key, Tr::Val, Tr::Time, Tr::R, Tr::Cursor, TInner, F>

The type used to enumerate the collections contents.

fn map_batches<F2: FnMut(&Self::Batch)>(&mut self, f: F2)

Maps logic across the non-empty sequence of batches in the trace.

fn advance_by(&mut self, frontier: &[TInner])

Advances the frontier of times the collection must be correctly accumulable through.

fn advance_frontier(&mut self) -> &[TInner]

Reports the frontier from which all time comparisions should be accurate.

fn distinguish_since(&mut self, frontier: &[TInner])

Advances the frontier that may be used in cursor_through.

fn distinguish_frontier(&mut self) -> &[TInner]

Reports the frontier from which the collection may be subsetted.

fn cursor_through(
    &mut self,
    upper: &[TInner]
) -> Option<(Self::Cursor, <Self::Cursor as Cursor<Tr::Key, Tr::Val, TInner, Tr::R>>::Storage)>

Acquires a cursor to the restriction of the collection's contents to updates at times not greater or equal to an element of upper.

fn cursor(
    &mut self
) -> (Self::Cursor, <Self::Cursor as Cursor<Self::Key, Self::Val, Self::Time, Self::R>>::Storage)

Provides a cursor over updates contained in the trace.

fn read_upper(&mut self, target: &mut Antichain<Self::Time>) where
    Self::Time: Timestamp, 

Reads the upper frontier of committed times.

impl<Tr, TInner, F> Clone for TraceEnter<Tr, TInner, F> where
    Tr: TraceReader + Clone, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.