Struct futures::stream::Filter[][src]

#[must_use = "streams do nothing unless polled"]
pub struct Filter<S, F> { /* fields omitted */ }

A stream combinator used to filter the results of a stream and only yield some values.

This structure is produced by the Stream::filter method.

Methods

impl<S, F> Filter<S, F>
[src]

Acquires a reference to the underlying stream that this combinator is pulling from.

Acquires a mutable reference to the underlying stream that this combinator is pulling from.

Note that care must be taken to avoid tampering with the state of the stream which may otherwise confuse this combinator.

Consumes this combinator, returning the underlying stream.

Note that this may discard intermediate state of this combinator, so care should be taken to avoid losing resources when this is called.

Trait Implementations

impl<S: Debug, F: Debug> Debug for Filter<S, F>
[src]

Formats the value using the given formatter. Read more

impl<S, F> Sink for Filter<S, F> where
    S: Sink
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The type of value that the sink accepts.

The type of value produced by the sink when an error occurs.

Begin the process of sending a value to the sink. Read more

Flush all output from this sink, if necessary. Read more

A method to indicate that no more values will ever be pushed into this sink. Read more

Creates a new object which will produce a synchronous sink. Read more

Composes a function in front of the sink. Read more

Composes a function in front of the sink. Read more

Transforms the error returned by the sink.

Map this sink's error to any error implementing From for this sink's Error, returning a new sink. Read more

Adds a fixed-size buffer to the current sink. Read more

Fanout items to multiple sinks. Read more

A future that completes when the sink has finished processing all pending requests. Read more

A future that completes after the given item has been fully processed into the sink, including flushing. Read more

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more

impl<S, F> Stream for Filter<S, F> where
    S: Stream,
    F: FnMut(&S::Item) -> bool
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The type of item this stream will yield on success.

The type of error this stream may generate.

Attempt to pull out the next value of this stream, returning None if the stream is finished. Read more

Important traits for Wait<S>

Creates an iterator which blocks the current thread until each item of this stream is resolved. Read more

Converts this stream into a Future. Read more

Converts a stream of type T to a stream of type U. Read more

Converts a stream of error type T to a stream of error type U. Read more

Filters the values produced by this stream according to the provided predicate. Read more

Filters the values produced by this stream while simultaneously mapping them to a different type. Read more

Chain on a computation for when a value is ready, passing the resulting item to the provided closure f. Read more

Chain on a computation for when a value is ready, passing the successful results to the provided closure f. Read more

Chain on a computation for when an error happens, passing the erroneous result to the provided closure f. Read more

Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more

Concatenate all results of a stream into a single extendable destination, returning a future representing the end result. Read more

Deprecated since 0.1.14

: please use Stream::concat2 instead

Concatenate all results of a stream into a single extendable destination, returning a future representing the end result. Read more

Execute an accumulating computation over a stream, collecting all the values into one final result. Read more

Flattens a stream of streams into just one continuous stream. Read more

Skip elements on this stream while the predicate provided resolves to true. Read more

Take elements from this stream while the predicate provided resolves to true. Read more

Runs this stream to completion, executing the provided closure for each element on the stream. Read more

Map this stream's error to any error implementing From for this stream's Error, returning a new stream. Read more

Creates a new stream of at most amt items of the underlying stream. Read more

Creates a new stream which skips amt items of the underlying stream. Read more

Fuse a stream such that poll will never again be called once it has finished. Read more

Borrows a stream, rather than consuming it. Read more

Catches unwinding panics while polling the stream. Read more

An adaptor for creating a buffered list of pending futures. Read more

An adaptor for creating a buffered list of pending futures (unordered). Read more

Deprecated

: functionality provided by select now

An adapter for merging the output of two streams. Read more

An adapter for zipping two streams together. Read more

Adapter for chaining two stream. Read more

Creates a new stream which exposes a peek method. Read more

An adaptor for chunking up items of the stream inside a vector. Read more

Creates a stream that selects the next element from either this stream or the provided one, whichever is ready first. Read more

A future that completes after the given stream has been fully processed into the sink, including flushing. Read more

Splits this Stream + Sink object into separate Stream and Sink objects. Read more

Do something with each item of this stream, afterwards passing it on. Read more

Do something with the error of this stream, afterwards passing it on. Read more

Auto Trait Implementations

impl<S, F> Send for Filter<S, F> where
    F: Send,
    S: Send

impl<S, F> Sync for Filter<S, F> where
    F: Sync,
    S: Sync