Struct OnceFut 

pub(crate) struct OnceFut<T> {
    state: OnceFutState<T>,
}

A OnceFut represents a shared asynchronous computation, that will be evaluated once for all Clone’s, with OnceFut::get providing a non-consuming interface to drive the underlying Future to completion

Fields

state: OnceFutState<T>

Implementations

impl<T: 'static> OnceFut<T>

pub(crate) fn new<Fut>(fut: Fut) -> Self

where Fut: Future<Output = Result<T>> + Send + 'static,

Create a new OnceFut from a Future

pub(crate) fn get(&mut self, cx: &mut Context<'_>) -> Poll<Result<&T>>

Get the result of the computation if it is ready, without consuming it

pub(crate) fn get_shared( &mut self, cx: &mut Context<'_>, ) -> Poll<Result<Arc<T>>>

Get shared reference to the result of the computation if it is ready, without consuming it

Trait Implementations

impl<T> Clone for OnceFut<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.