Trait Positioner

pub trait Positioner<Item> {
    type Position: Clone + Ord;

    // Required methods
    fn position(&self) -> Self::Position;
    fn update(&mut self, item: &Item);
}

Trait for tracking the current position of a Stream.

Required Associated Types

type Position: Clone + Ord

The type which keeps track of the position

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

Implementors

impl Positioner<char> for SourcePosition

type Position = SourcePosition

impl<Item> Positioner<Item> for IndexPositioner

where Item: PartialEq + Clone,

type Position = usize