actix 0.5.3

Actor framework for Rust
Documentation 
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use std::marker::PhantomData;
use futures::{Poll, Async};

use actor::Actor;
use fut::ActorFuture;


/// Future for the `from_err` combinator, changing the error type of a future.
///
/// This is created by the `Future::from_err` method.
#[derive(Debug)]
#[must_use = "futures do nothing unless polled"]
pub struct FromErr<A, E> where A: ActorFuture {
    future: A,
    f: PhantomData<E>
}

pub fn new<A, E>(future: A) -> FromErr<A, E>
    where A: ActorFuture
{
    FromErr {
        future,
        f: PhantomData
    }
}

impl<A:ActorFuture, E:From<A::Error>> ActorFuture for FromErr<A, E> {
    type Item = A::Item;
    type Error = E;
    type Actor = A::Actor;

    fn poll(&mut self,
            act: &mut A::Actor,
            ctx: &mut <A::Actor as Actor>::Context) -> Poll<A::Item, E>
    {
        let e = match self.future.poll(act, ctx) {
            Ok(Async::NotReady) => return Ok(Async::NotReady),
            other => other,
        };
        e.map_err(From::from)
    }
}