Trait hooks_core::HookPollNextUpdate

pub trait HookPollNextUpdate {
    fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>;
}

Required Methods

fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>

The meaning of the return value is:

• Poll::Pending means this hook’s inner state is not updated after the last use_hook. The executor DO NOT NEED to call use_hook again because the returned value is expected to remain the same as the value from the last call. The executor CAN still call use_hook to re-get the returned value.

• Poll::Ready(true) means this hook’s inner state has been updated since the last use_hook. The executor SHOULD call use_hook again to get the new value. The executor CAN ignore this update, by polling next update without calling use_hook.

• Poll::Ready(false) means this hook’s inner state will never be updated. The executor CAN no longer call use_hook or even drop this hook. The executor CAN also call use_hook to get the value and the hook MIGHT become dynamic again during use_hook or when some operations is done to the returned value.

Implementations on Foreign Types

impl<H: HookPollNextUpdate + Unpin + ?Sized> HookPollNextUpdate for &mut H

fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>

impl<H: ?Sized + HookPollNextUpdate + Unpin> HookPollNextUpdate for Box<H>

fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>

impl<P> HookPollNextUpdate for Pin<P>where
    P: DerefMut,
    <P as Deref>::Target: HookPollNextUpdate,

fn poll_next_update(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<bool>

Implementors

impl<Data, P, U, H> HookPollNextUpdate for FnHook<Data, P, U, H>where
    P: FnMut(Pin<&mut Data>, &mut Context<'_>) -> Poll<bool>,

impl<H1: HookPollNextUpdate, H2: HookPollNextUpdate> HookPollNextUpdate for HookPair<H1, H2>