1 //! Contains [`Either`] and related types and functions.
3 //! See [`Either`] documentation for more details.
18 /// [`Either`] is useful for handling conditional branching in service middleware
22 pub enum Either<A, B> {  enum
29 impl<A, B, Request> Service<Request> for Either<A, B>  implementation
38     type Future = Either<A::Future, B::Future>;
41         use self::Either::*;  in poll_ready()
50         use self::Either::*;  in call()
59 impl<A, B, T, AE, BE> Future for Either<A, B>  implementation
76 impl<S, A, B> Layer<S> for Either<A, B>  implementation
81     type Service = Either<A::Service, B::Service>;
85             Either::A(layer) => Either::A(layer.layer(inner)),  in layer()
86             Either::B(layer) => Either::B(layer.layer(inner)),  in layer()