Trait Input 

pub trait Input {
    type Token: Copy + Eq;
    type Slice;
    type Checkpoint: Copy + Eq + Ord;

    // Required methods
    fn next_token(&mut self) -> Option<Self::Token>;
    fn peek_token(&self) -> Option<Self::Token>;
    fn slice_since(&self, cp: Self::Checkpoint) -> Self::Slice;
    fn checkpoint(&self) -> Self::Checkpoint;
    fn reset(&mut self, checkpoint: Self::Checkpoint);
    fn offset(&self) -> usize;
    fn remaining(&self) -> Self::Slice;
    fn is_eof(&self) -> bool;
}

Required Associated Types

type Token: Copy + Eq

type Slice

type Checkpoint: Copy + Eq + Ord

Required Methods

fn next_token(&mut self) -> Option<Self::Token>

1トークン消費して返す。EOF なら None。

fn peek_token(&self) -> Option<Self::Token>

次のトークンを消費せずに返す。

fn slice_since(&self, cp: Self::Checkpoint) -> Self::Slice

checkpoint から現在位置までの Slice を返す。

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

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

fn offset(&self) -> usize

fn remaining(&self) -> Self::Slice

fn is_eof(&self) -> bool

Implementors

impl<'a> Input for ByteInput<'a>

type Checkpoint = usize

type Slice = &'a [u8]

type Token = u8

impl<'a> Input for StrInput<'a>

type Checkpoint = usize

type Slice = &'a str

type Token = char