Struct MapErr

pub struct MapErr<A, F, E> { /* private fields */ }

Service for the map_err combinator, changing the type of a service’s error.

This is created by the ServiceExt::map_err method.

Trait Implementations

impl<A, F, E> Clone for MapErr<A, F, E>

where A: Clone, F: Clone,

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<A, F, E> Service for MapErr<A, F, E>

where A: Service, F: Fn(A::Error) -> E + Clone,

type Request = <A as Service>::Request

Requests handled by the service.

type Response = <A as Service>::Response

Responses given by the service.

type Error = E

Errors produced by the service.

type Future = MapErrFuture<A, F, E>

The future response value.

fn poll_ready(&mut self, ctx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Ready when the service is able to process requests.

fn call(&mut self, req: A::Request) -> Self::Future

Process the request and return the response asynchronously.

fn map<F, R>(self, f: F) -> Map<Self, F, R>

where Self: Sized, F: FnMut(Self::Response) -> R,

Map this service’s output to a different type, returning a new service of the resulting type.

fn map_err<F, E>(self, f: F) -> MapErr<Self, F, E>

where Self: Sized, F: Fn(Self::Error) -> E,

Map this service’s error to a different error, returning a new service.