Trait combine::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

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