Struct futures::stream::FilterMap [] [src]

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

A combinator used to filter the results of a stream and simultaneously map them to a different type.

This structure is returned by the Stream::filter_map method.

Methods

impl<S, F> FilterMap<S, F>
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Acquires a reference to the underlying stream that this combinator is pulling from.

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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.

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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 FilterMap<S, F>
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Formats the value using the given formatter. Read more

impl<S, F> Sink for FilterMap<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.

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

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

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

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

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Composes a function in front of the sink. Read more

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Composes a function in front of the sink. Read more

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Transforms the error returned by the sink.

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

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

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Fanout items to multiple sinks. Read more

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

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

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

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

The type of error this stream may generate.

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

Important traits for Wait<S>
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Creates an iterator which blocks the current thread until each item of this stream is resolved. Read more

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Converts this stream into a Future. Read more

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

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

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

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

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

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

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

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

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

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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

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

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

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

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

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

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

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

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

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

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Borrows a stream, rather than consuming it. Read more

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Catches unwinding panics while polling the stream. Read more

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

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

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Deprecated

: functionality provided by select now

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

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An adapter for zipping two streams together. Read more

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Adapter for chaining two stream. Read more

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

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

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

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

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

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

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

Auto Trait Implementations

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

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