After returns a single future that resolves after all of the given futures.

Err returns a new future that is immediately ready with the given error.

Join combines the values from multiple futures into a single future that resolves to []T.

Map converts a future's result to a different type using a conversion function.

MapOk converts a future's value to a different type using a conversion function.

MapOk converts a future's value to an `any` type.

MapOk converts a future's value to a value of a different type.

New constructs a new future from a poll function.

Ok returns a new future that is immediately ready with the given value.

Then invokes f when the future is resolved and returns a future that resolves when f's return value is resolved.

Future represents a result that will be available at some point in the future.

Result holds either a value or an error.