Trait combine::stream::position::Positioner

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

Trait for tracking the current position of a Stream.

Associated Types

type Position: Clone + Ord

The type which keeps track of the position

type Checkpoint: Clone

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Required methods

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

Returns the current position

pub fn update(&mut self, token: &Item)

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

pub fn checkpoint(&self) -> Self::Checkpoint

pub fn reset(&mut self, checkpoint: Self::Checkpoint)

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Implementations on Foreign Types

impl<Item, T: ?Sized> Positioner<Item> for &mut T where
    Item: Clone,
    T: Positioner<Item>, 

type Position = T::Position

type Checkpoint = T::Checkpoint

pub fn position(&self) -> T::Position

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

pub fn checkpoint(&self) -> Self::Checkpoint

pub fn reset(&mut self, checkpoint: Self::Checkpoint)

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Implementors

impl Positioner<char> for SourcePosition

type Position = SourcePosition

type Checkpoint = Self

pub fn position(&self) -> SourcePosition

pub fn update(&mut self, token: &char)

pub fn checkpoint(&self) -> Self::Checkpoint

pub fn reset(&mut self, checkpoint: Self::Checkpoint)

impl Positioner<u8> for SourcePosition

type Position = SourcePosition

type Checkpoint = Self

pub fn position(&self) -> SourcePosition

pub fn update(&mut self, token: &u8)

pub fn checkpoint(&self) -> Self::Checkpoint

pub fn reset(&mut self, checkpoint: Self::Checkpoint)

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

type Position = usize

type Checkpoint = Self

pub fn position(&self) -> usize

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

pub fn checkpoint(&self) -> Self::Checkpoint

pub fn reset(&mut self, checkpoint: Self::Checkpoint)

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