Trait Positioner

pub trait Positioner: Clone + PartialEq {
    type Position: Clone + Ord;

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

Positioner represents the operations needed to update a position given an item from the stream When implementing stream for custom token type this must be implemented for that token to allow the position to be updated

Required Associated Types

type Position: Clone + Ord

Required Methods

fn start() -> Self::Position

Creates a start position

fn update(&self, position: &mut Self::Position)

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

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Positioner for char

type Position = SourcePosition

fn start() -> SourcePosition

fn update(&self, position: &mut SourcePosition)

impl Positioner for u8

type Position = BytePosition

fn start() -> BytePosition

fn update(&self, b: &mut BytePosition)

impl<'a, T> Positioner for &'a T

where T: Positioner,

type Position = <T as Positioner>::Position

fn start() -> <T as Positioner>::Position

fn update(&self, position: &mut <T as Positioner>::Position)

Implementors