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) -> MapErr<A, F, E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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

where A: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

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

where A: Service<R>, F: Fn(<A as Service<R>>::Error) -> E,

type Response = <A as Service<R>>::Response

Responses given by the service.

type Error = E

Errors produced by the service when polling readiness or executing call.

async fn ready( &self, ctx: ServiceCtx<'_, MapErr<A, F, E>>, ) -> Result<(), <MapErr<A, F, E> as Service<R>>::Error>

Returns when the service is ready to process requests.

fn poll( &self, cx: &mut Context<'_>, ) -> Result<(), <MapErr<A, F, E> as Service<R>>::Error>

Polls the service from the current async task.

async fn call( &self, req: R, ctx: ServiceCtx<'_, MapErr<A, F, E>>, ) -> Result<<MapErr<A, F, E> as Service<R>>::Response, <MapErr<A, F, E> as Service<R>>::Error>

Processes a request and returns the response asynchronously.

async fn shutdown(&self)

Shuts down the service.

fn map<F, Res>(self, f: F) -> ServiceChain<Map<Self, F, Req, Res>, Req>

where Self: Sized, F: Fn(Self::Response) -> Res,

Maps this service’s output to a different type, returning a new service.

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

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

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