Struct differential_dataflow::trace::implementations::option_container::OptionContainer

pub struct OptionContainer<C> { /* private fields */ }

A container that effectively represents default values.

This container is meant to be a minimal non-trivial container, and may be useful in unifying OrdVal and OrdKey spines.

Trait Implementations

impl<C> BatchContainer for OptionContainer<C>

where C: BatchContainer, C::PushItem: Default + Ord,

type PushItem = <C as BatchContainer>::PushItem

The type of contained item.

type ReadItem<'a> = OptionWrapper<'a, C>

The type that can be read back out of the container.

fn push(&mut self, item: Self::PushItem)

Inserts an owned item.

fn copy<'a>(&mut self, item: Self::ReadItem<'a>)

Inserts a borrowed item.

fn with_capacity(size: usize) -> Self

Creates a new container with sufficient capacity.

fn merge_capacity(cont1: &Self, cont2: &Self) -> Self

Creates a new container with sufficient capacity.

fn index(&self, index: usize) -> Self::ReadItem<'_>

Reference to the element at this position.

fn len(&self) -> usize

Number of contained elements

fn copy_push(&mut self, item: &Self::PushItem)

Inserts an owned item.

fn copy_range(&mut self, other: &Self, start: usize, end: usize)

Extends from a range of items in anotherSelf.

fn last(&self) -> Option<Self::ReadItem<'_>>

Returns the last item if the container is non-empty.

fn is_empty(&self) -> bool

Indicates if the length is zero.

fn advance<F: for<'a> Fn(Self::ReadItem<'a>) -> bool>( &self, start: usize, end: usize, function: F ) -> usize

Reports the number of elements satisfing the predicate.