Function futures_util::future::poll_fn [−][src]
pub fn poll_fn<T, F>(f: F) -> PollFn<F>ⓘ where
F: FnMut(&mut Context<'_>) -> Poll<T>,
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::task::{Context, Poll}; fn read_line(_cx: &mut Context<'_>) -> Poll<String> { Poll::Ready("Hello, World!".into()) } let read_future = poll_fn(read_line); assert_eq!(read_future.await, "Hello, World!".to_owned());