#[must_use = "streams do nothing unless polled"]
pub struct FilterMap<St, Fut, F> where
F: FnMut(<St as Stream>::Item) -> Fut,
Fut: Future,
St: Stream, { /* 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.
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.
[+]
[+]
type Item = T
Values yielded by the stream.
[−]
Attempt to pull out the next value of this stream, registering the current task for wakeup if the value is not yet available, and returning None
if the stream is exhausted. Read more
[+]
[+]
type Error = !
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
[−]
🔬 This is a nightly-only experimental API. (try_from
)
[+]
type Error = <U as TryFrom<T>>::Error
🔬 This is a nightly-only experimental API. (try_from
)
The type returned in the event of a conversion error.
[−]
🔬 This is a nightly-only experimental API. (try_from
)
[+]
[+]
[+]
[+]
[−]
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
[+]
[−]
Creates a future that resolves to the next item in the stream. Read more
[−]
Converts this stream into a future of (next_item, tail_of_stream)
. If the stream terminates, then the next item is None
. Read more
[−]
Maps this stream's items to a different type, returning a new stream of the resulting type. Read more
[−]
Filters the values produced by this stream according to the provided asynchronous predicate. Read more
[−]
Filters the values produced by this stream while simultaneously mapping them to a different type according to the provided asynchronous closure. Read more
[−]
Computes from this stream's items new items of a different type using an asynchronous closure. 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 items of a stream into a single extendable destination, returning a future representing the end result. Read more
fn fold<T, Fut, F>(self, init: T, f: F) -> Fold<Self, Fut, T, F> where F: FnMut(T, Self::Item) -> Fut, Fut: Future<Output = T>, | [src] |
[−]
Execute an accumulating asynchronous 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 provided asynchronous predicate resolves to true
. Read more
[−]
Take elements from this stream while the provided asynchronous predicate resolves to true
. Read more
[−]
Runs this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
[−]
Creates a new stream of at most n
items of the underlying stream. Read more
[−]
Creates a new stream which skips n
items of the underlying stream. Read more
[−]
Fuse a stream such that poll_next
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
[−]
An adapter for zipping two streams together. 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
Important traits for Either<L, R>
impl<L, R> Read for Either<L, R> where
L: Read,
R: Read, impl<L, R> Write for Either<L, R> where
L: Write,
R: Write, impl<L, R> Iterator for Either<L, R> where
L: Iterator,
R: Iterator<Item = <L as Iterator>::Item>, type Item = <L as Iterator>::Item;
[−]
Wrap this stream in an Either
stream, making it the left-hand variant of that Either
. Read more
Important traits for Either<L, R>
impl<L, R> Read for Either<L, R> where
L: Read,
R: Read, impl<L, R> Write for Either<L, R> where
L: Write,
R: Write, impl<L, R> Iterator for Either<L, R> where
L: Iterator,
R: Iterator<Item = <L as Iterator>::Item>, type Item = <L as Iterator>::Item;
[−]
Wrap this stream in an Either
stream, making it the right-hand variant of that Either
. Read more
[−]
[+]
type Ok = T
The type of successful values yielded by this future
type Error = E
The type of failures yielded by this future
[−]
Poll this TryStream
as if it were a Stream
. Read more
[+]
[−]
Wraps the current stream in a new stream which converts the error type into the one provided. Read more
[−]
Wraps the current stream in a new stream which maps the success value using the provided closure. Read more
[−]
Wraps the current stream in a new stream which maps the error value using the provided closure. Read more
[−]
Creates a future that attempts to resolve the next item in the stream. If an error is encountered before the next item, the error is returned instead. Read more
[−]
Attempts to run this stream to completion, executing the provided asynchronous closure for each element on the stream. Read more
[−]
Attempt to Collect all of the values of this stream into a vector, returning a future representing the result of that computation. Read more