1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89

//! A types for compatibility with futures 0.1 crate.

#[cfg(feature = "std-future")]
mod internal {
    pub use std::task::{Poll, Waker};
}

#[cfg(not(feature = "std-future"))]
mod internal;

#[doc(inline)]
pub use self::internal::*;

#[cfg(feature = "futures01")]
pub(crate) use self::internal_futures01::*;

#[cfg(feature = "futures01")]
mod internal_futures01 {
    use std::pin::Pin;

    use futures::{Async, Future as Future01, Poll as Poll01};
    use pin_utils::unsafe_unpinned;

    use crate::response::Response;

    use super::*;

    #[cfg(not(feature = "std-future"))]
    pub(crate) fn convert_01_to_std<T, E>(poll: Poll01<T, E>) -> Poll<Result<T, E>> {
        match poll {
            Ok(Async::Ready(i)) => Poll::Ready(Ok(i)),
            Ok(Async::NotReady) => Poll::Pending,
            Err(e) => Poll::Ready(Err(e)),
        }
    }

    pub(crate) fn convert_std_to_01<T, E>(poll: Poll<Result<T, E>>) -> Poll01<T, E> {
        match poll {
            Poll::Ready(Ok(i)) => Ok(Async::Ready(i)),
            Poll::Ready(Err(e)) => Err(e),
            Poll::Pending => Ok(Async::NotReady),
        }
    }

    #[cfg(feature = "std-future")]
    type Wrap<T> = crate::response::FutureResponse<futures_util::compat::Compat01As03<T>>;

    #[cfg(not(feature = "std-future"))]
    type Wrap<T> = T;

    pub struct Compat<T> {
        inner: Wrap<T>,
    }

    impl<T> Compat<T> {
        unsafe_unpinned!(inner: Wrap<T>);

        #[cfg(feature = "std-future")]
        pub(crate) fn new(object: T) -> Self {
            let object = futures_util::compat::Compat01As03::new(object);
            Compat {
                inner: crate::response::FutureResponse::new(object),
            }
        }

        #[cfg(not(feature = "std-future"))]
        pub(crate) fn new(object: T) -> Self {
            Compat { inner: object }
        }
    }

    impl<T> Response for Compat<T>
    where
        T: Future01,
    {
        type Ok = T::Item;
        type Error = T::Error;

        #[cfg(feature = "std-future")]
        fn poll(mut self: Pin<&mut Self>, w: &Waker) -> Poll<Result<Self::Ok, Self::Error>> {
            Pin::new(&mut self.inner).poll(w)
        }

        #[cfg(not(feature = "std-future"))]
        fn poll(self: Pin<&mut Self>, _w: &Waker) -> Poll<Result<Self::Ok, Self::Error>> {
            convert_01_to_std(Future01::poll(self.inner()))
        }
    }
}