# Function futures::future::poll_fn [−] [src]

    pub fn poll_fn<T, E, F>(f: F) -> PollFn<F> where
        F: FnMut() -> Poll<T, E>,

Creates a new future wrapping around a function returning `Poll`.

Polling the returned future delegates to the wrapped function.

# Examples

    use futures::future::poll_fn;
    use futures::{Async, Poll};

    fn read_line() -> Poll<String, std::io::Error> {
        Ok(Async::Ready("Hello, World!".into()))
    }

    let read_future = poll_fn(read_line);

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