Struct FutureOption

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

A future representing a value which may or may not be present.

Created by the IntoFuture implementation for std::option::Option.

Trait Implementations

impl<T: Clone> Clone for FutureOption<T>

fn clone(&self) -> FutureOption<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for FutureOption<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> From<Option<T>> for FutureOption<T>

fn from(o: Option<T>) -> Self

Converts to this type from the input type.

impl<F, T, E> Future for FutureOption<F>

where F: Future<Item = T, Error = E>,

type Item = Option<T>

A successful value

type Error = E

An error

fn poll(&mut self, cx: &mut Context<'_>) -> Poll<Option<T>, E>

Attempt to resolve the future to a final value, registering the current task for wakeup if the value is not yet available.