Trait nom::InputIter

pub trait InputIter {
type Item;
type Iter: Iterator<Item = (usize, Self::Item)>;
type IterElem: Iterator<Item = Self::Item>;
    fn iter_indices(&self) -> Self::Iter;
    fn iter_elements(&self) -> Self::IterElem;
    fn position<P>(&self, predicate: P) -> Option<usize>
    where
        P: Fn(Self::Item) -> bool;
    fn slice_index(&self, count: usize) -> Option<usize>;
}

abstracts common iteration operations on the input type

Associated Types

type Item

the current input type is a sequence of that Item type.

example: u8 for &[u8] or char for &str`

type Iter: Iterator<Item = (usize, Self::Item)>

an iterator over the input type, producing the item and its position for use with Slice. If we're iterating over &str, the position corresponds to the byte index of the character

type IterElem: Iterator<Item = Self::Item>

an iterator over the input type, producing the item

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Required methods

fn iter_indices(&self) -> Self::Iter

returns an iterator over the elements and their byte offsets

fn iter_elements(&self) -> Self::IterElem

returns an iterator over the elements

fn position<P>(&self, predicate: P) -> Option<usize> where
    P: Fn(Self::Item) -> bool, 

finds the byte position of the element

fn slice_index(&self, count: usize) -> Option<usize>

get the byte offset from the element's position in the stream

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Implementations on Foreign Types

impl<'a> InputIter for &'a [u8]

type Item = u8

type Iter = Enumerate<Self::IterElem>

type IterElem = Map<Iter<'a, Self::Item>, fn(_: &u8) -> u8>

fn iter_indices(&self) -> Self::Iter

fn iter_elements(&self) -> Self::IterElem

fn position<P>(&self, predicate: P) -> Option<usize> where
    P: Fn(Self::Item) -> bool, 

fn slice_index(&self, count: usize) -> Option<usize>

impl<'a> InputIter for &'a str

type Item = char

type Iter = CharIndices<'a>

type IterElem = Chars<'a>

fn iter_indices(&self) -> Self::Iter

fn iter_elements(&self) -> Self::IterElem

fn position<P>(&self, predicate: P) -> Option<usize> where
    P: Fn(Self::Item) -> bool, 

fn slice_index(&self, count: usize) -> Option<usize>

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Implementors

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