Struct futures_state_stream::Map

pub struct Map<S, F> { /* fields omitted */ }

A stream which applies a transform to the elements of a stream.

Trait Implementations

impl<S, F, B> StateStream for Map<S, F> where
    S: StateStream,
    F: FnMut(S::Item) -> B, 

type Item = B

The items being streamed.

type State = S::State

The state returned when streaming completes.

type Error = S::Error

The error returned.

fn poll(&mut self) -> Poll<StreamEvent<B, S::State>, (S::Error, S::State)>

Similar to Stream::poll.

fn into_future(self) -> IntoFuture<Self> where
    Self: Sized, 

Returns a future which yields the next element of the stream.

fn into_stream(self) -> IntoStream<Self> where
    Self: Sized, 

Returns a normal Stream which yields the elements of this stream and discards the state.

fn map<F, B>(self, f: F) -> Map<Self, F> where
    Self: Sized,
    F: FnMut(Self::Item) -> B, 

Returns a stream which applies a transform to items of this stream.

fn map_err<F, B>(self, f: F) -> MapErr<Self, F> where
    Self: Sized,
    F: FnMut(Self::Error) -> B, 

Returns a stream which applies a transform to errors of this stream.

fn map_state<F, B>(self, f: F) -> MapState<Self, F> where
    Self: Sized,
    F: FnOnce(Self::State) -> B, 

Returns a stream which applies a transform to the state of this stream.

fn filter<F>(self, f: F) -> Filter<Self, F> where
    Self: Sized,
    F: FnMut(&Self::Item) -> bool, 

Returns a stream which filters items of this stream by a predicate.

fn filter_map<F, B>(self, f: F) -> FilterMap<Self, F> where
    Self: Sized,
    F: FnMut(Self::Item) -> Option<B>, 

Returns a stream which filters and transforms items of this stream by a predicate.

fn collect(self) -> Collect<Self> where
    Self: Sized, 

Returns a stream which collects all items of this stream into a Vec, returning it along with the stream's state.

fn for_each<F>(self, f: F) -> ForEach<Self, F> where
    Self: Sized,
    F: FnMut(Self::Item), 

Returns a future which applies a closure to each item of this stream.