pub enum MaybeDone<Fut: Future> {
    Future(Fut),
    Done(Fut::Output),
    Gone,
}
Expand description

A future that may have completed.

This is created by the maybe_done() function.

Variants

Future(Fut)

A not-yet-completed future

Done(Fut::Output)

The output of the completed future

Gone

The empty variant after the result of a MaybeDone has been taken using the take_output method.

Implementations

Returns an Option containing a mutable reference to the output of the future. The output of this method will be Some if and only if the inner future has been completed and take_output has not yet been called.

Attempt to take the output of a MaybeDone without driving it towards completion.

Trait Implementations

Formats the value using the given formatter. Read more

Returns true if the underlying future should no longer be polled.

The type of value produced on completion.

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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The output that the future will produce on completion.

Which kind of future are we turning this into?

Creates a future from a value. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.