pub fn poll_fn<T, F>(f: F) -> PollFn<F>ⓘNotable traits for PollFn<F>impl<T, F> Future for PollFn<F> where F: FnMut(&mut Context<'_>) -> Poll<T>, type Output = T; where F: FnMut(&mut Context<'_>) -> Poll<T>,
impl<T, F> Future for PollFn<F> where F: FnMut(&mut Context<'_>) -> Poll<T>, type Output = T;