Trait combine::stream::StreamOnce

pub trait StreamOnce {
    type Item: Clone + PartialEq;
    type Range: Clone + PartialEq;
    type Position: Clone + Ord;
    type Error: ParseError<Self::Item, Self::Range, Self::Position>;
    fn uncons(&mut self) -> Result<Self::Item, StreamErrorFor<Self>>;

    fn is_partial(&self) -> bool { ... }
}

StreamOnce represents a sequence of items that can be extracted one by one.

Associated Types

type Item: Clone + PartialEq

The type of items which is yielded from this stream.

type Range: Clone + PartialEq

The type of a range of items yielded from this stream. Types which do not a have a way of yielding ranges of items should just use the Self::Item for this type.

type Position: Clone + Ord

Type which represents the position in a stream. Ord is required to allow parsers to determine which of two positions are further ahead.

type Error: ParseError<Self::Item, Self::Range, Self::Position>

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Required methods

fn uncons(&mut self) -> Result<Self::Item, StreamErrorFor<Self>>

Takes a stream and removes its first item, yielding the item and the rest of the elements. Returns Err if no element could be retrieved.

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Provided methods

fn is_partial(&self) -> bool

Returns true if this stream only contains partial input.

See PartialStream.

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Implementations on Foreign Types

impl<'a> StreamOnce for &'a str

type Item = char

type Range = &'a str

type Position = PointerOffset

type Error = StringStreamError

fn uncons(&mut self) -> Result<char, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<'a, T> StreamOnce for &'a [T] where
    T: Clone + PartialEq, 

type Item = T

type Range = &'a [T]

type Position = PointerOffset

type Error = UnexpectedParse

fn uncons(&mut self) -> Result<T, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

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Implementors

impl<'a, T> StreamOnce for SliceStream<'a, T> where
    T: PartialEq + 'a, 

type Item = &'a T

type Range = &'a [T]

type Position = PointerOffset

type Error = UnexpectedParse

fn uncons(&mut self) -> Result<&'a T, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<I> StreamOnce for BufferedStream<I> where
    I: StreamOnce + Positioned,
    I::Item: Clone + PartialEq, 

type Item = I::Item

type Range = I::Range

type Position = I::Position

type Error = I::Error

fn uncons(&mut self) -> Result<I::Item, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<I, X, S> StreamOnce for State<I, X> where
    I: StreamOnce,
    X: Positioner<I::Item>,
    S: StreamError<I::Item, I::Range>,
    I::Error: ParseError<I::Item, I::Range, X::Position, StreamError = S>,
    I::Error: ParseError<I::Item, I::Range, I::Position, StreamError = S>, 

type Item = I::Item

type Range = I::Range

type Position = X::Position

type Error = I::Error

fn uncons(&mut self) -> Result<I::Item, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<I: Iterator> StreamOnce for IteratorStream<I> where
    I::Item: Clone + PartialEq, 

type Item = I::Item

type Range = I::Item

type Position = ()

type Error = UnexpectedParse

fn uncons(&mut self) -> Result<I::Item, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<R: Read> StreamOnce for ReadStream<R>

type Item = u8

type Range = u8

type Position = usize

type Error = Errors<u8, u8, usize>

fn uncons(&mut self) -> Result<u8, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<S> StreamOnce for Stream<S> where
    S: StreamOnce + Positioned, 

type Item = S::Item

type Range = S::Range

type Position = S::Position

type Error = ParseError<S>

fn uncons(&mut self) -> Result<Self::Item, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

impl<S> StreamOnce for PartialStream<S> where
    S: StreamOnce, 

type Item = S::Item

type Range = S::Range

type Position = S::Position

type Error = S::Error

fn uncons(&mut self) -> Result<S::Item, StreamErrorFor<Self>>

fn is_partial(&self) -> bool

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