Description

The task

The `actix` crate currently provides combinators for `ActorFuture` through the `ActorFutureExt` trait, but it lacks equivalents of the standard `TryFutureExt` for futures whose output is `Result<T, E>`. When an `ActorFuture` returns a `Result`, there is no way to apply `.map_ok(...)`, `.map_err(...)`, or…