Trait combine::stream::state::Positioner

pub trait Positioner<Item> {
    type Position: Clone + Ord;
    fn position(&self) -> Self::Position;
    fn update(&mut self, item: &Item);
}

Trait for tracking the current position of a Stream.

Associated Types

type Position: Clone + Ord

The type which keeps track of the position

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Required methods

fn position(&self) -> Self::Position

Returns the current position

fn update(&mut self, item: &Item)

Updates the position given that item has been taken from the stream

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Implementors

impl Positioner<char> for SourcePosition

type Position = SourcePosition

fn position(&self) -> SourcePosition

fn update(&mut self, item: &char)

impl<Item> Positioner<Item> for IndexPositioner where
    Item: PartialEq + Clone, 

type Position = usize

fn position(&self) -> usize

fn update(&mut self, _item: &Item)

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