Struct Deferred 

pub struct Deferred<T> { /* private fields */ }

One piece of code a program fetches on first use; see the module documentation.

Implementations

impl<T> Deferred<T>

where T: Copy,

pub const fn new() -> Deferred<T>

pub fn wait(&self) -> impl Future<Output = Option<T>> + Send

where T: Send + Sync,

The code once it is in, fetching it if no fetch is running. None when this fetch fails or the program registered no loader.

pub fn wake_on_arrival(&self, waker: Waker)

Wake waker once the code is in or this fetch failed: for work polled once a frame that found the code missing, so it is polled again then rather than on whatever frame comes next.

pub fn get(&self) -> Option<T>

The code, or None while it is still to come (and then fetched).

pub fn generation(&self) -> u64

Bumped when the code arrives: what was made without it is made again once this moved.

pub fn defer(&self, load: fn())

How the program fetches the code: load starts the fetch and, once the code is in, calls Self::install (or Self::load_failed).

pub fn install(&self, value: T)

The code is in.

pub fn load_failed(&self)

The fetch failed: the next use fetches again.

Trait Implementations

impl<T> Default for Deferred<T>

where T: Copy,

fn default() -> Deferred<T>

Returns the “default value” for a type.